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Expert in Wind Energy, Wind Turbine Design, Aircraft Icing and Anti-icing, Wind Turbine Icing, Aerodynamics
Available for your Consulting and Expert Witness Needs
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Summary of Expertise:
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Listed with other top experts in: |
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In more than 30 years of activity, expert has gained a wide and solid experience in fluid dynamics and applied aerodynamics, particularly in wind turbine and aircraft aerodynamics. In these domains he conducted research that covered analytical and numerical modeling of the Vertical Axis Wind Turbine (VAWT) aerodynamics for performance prediction and design purposes, numerical simulation of the aircraft and wind turbine icing in conditions which are specific to the rime and glaze types of accretion, including those related to the Supercooled Large Droplets (SLD), numerical modeling of the hot-air and electro-thermal based aircraft anti-icing systems. He also carried out studies in unsteady aerodynamics, focused especially on the dynamic stall phenomenon which occurs on wind turbine and helicopter rotor blades, did research, based on numerical tools, on the stability of the boundary layer flow, including transition prediction and control of the laminar boundary layer on airfoils and finite span wings, performed CFD research regarding the aircraft drag prediction and reduction at subsonic and transonic speeds. In connection to his research on wind turbine aerodynamics he studied the flow around airfoils at low Reynolds numbers and large and very large angles of attack (0 to 360 degrees), building a database with the aerodynamic characteristics of some of the airfoils which are widely used in the vertical axis wind turbine design (NACA symmetric series, Sandia Natural Laminar series). In what regards the aerodynamic characteristics of the finite span wings one must mention his expertise in the area of the variable-geometry delta configurations, on which he performed theoretical research and conducted wind tunnel tests. Based on the results of those studies he applied for and obtained two patents. Expert coded and used panel-type numerical methods for the computation of the flow around single and multi-element airfoils. He incorporated these aerodynamic analysis tools in the icing simulation code CANICE. Developed in two-dimensional and three-dimensional versions CANICE is one of the five codes accepted worldwide for aircraft icing and anti-icing simulation, being currently used in Canada in the aircraft certification process for flight in icing conditions. One of the most significant results of his work in the flow stability analysis area is the code SCOLIC. This performs numerical analysis of the boundary layer stability for two and three-dimensional flows and predicts the location of the laminar to turbulent transition. A major aeronautical company uses SCOLIC to compute stability characteristics of the flow on lifting surfaces (wings, empennages) and to determine the position where the strips used in forced transition tests should be installed on the wings of their wind tunnel models. Expert has published 6 books and textbooks on fluid mechanics and subsonic aerodynamics. For over 25 years he has taught courses in fluid mechanics, subsonic aerodynamics and unsteady aerodynamics at undergraduate and graduate levels. These courses include comprehensive chapters on analytical and numerical methods for the computation of the aerodynamic characteristics of airfoils and finite span wings. He also successfully directed a team involved in applied aerodynamic research in collaboration with a prominent partner of the aeronautical industry.
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Expert enjoys a good reputation in the wind energy community for his significant contributions to the theory of the aerodynamic performance of the Darrieus vertical-axis wind turbines. For this type of wind energy converters he proposed the double-multiple streamtube (DMST) model that allows the computation of the energy (and power) extracted from the wind by a VAWT with known geometric and operational characteristics. This model is being used by: Sandia National Laboratories (Albuquerque, New Mexico, USA), FloWind Inc. (San Rafael, California, USA), Atlantic Wind Test Site (Prince Edward Island, Canada), Delft Technical University and Ecofys Engineering Co. (Netherlands) and by Tottori University, Tokai University and Showa Denki Co.(in Japan) in their wind turbine analysis and design studies. Based on the DMST model, expert developed several versions of the CARDAAV computer code, for the prediction of the aerodynamic characteristics, wind loads on turbine blades and the performances of the Darrieus-type rotor. Starting with the CARDAA version, the code was constantly improved. Following the implementation of several important corrections, including the dynamic stall (four models are now available) and the influence of the main secondary effects (tower wake, struts and aerodynamic brakes drag) CARDAAV has continuously gained in precision and reliability. To its previous options, expert added recently the possibility to compute the performances of straight bladed H-type rotors provided with variable pitch systems able to reduce the power losses due to the dynamic stall or having inclined blades, for improved self-starting qualities. For several years now he is also carrying on research on the use of the vertical axis wind turbines in built environments. In relation to this he did numerical simulations to determine the wind characteristics in urban areas, near or on top of buildings and developed a modified version of the DMST model for the analysis of the aerodynamic characteristics and the performances of a H-Darrieus rotor that operates in skewed wind conditions. By coupling CARDAAV to a genetic algorithm optimizer he developed an optimization tool, including geometric and structural constraints, which is very efficient and useful for design purposes. For many years expert acted as a consultant for major companies and research centers in USA and Europe on problems related to wind turbine aerodynamics, performance prediction and optimal design. Rated by one of the most important reviewers in the wind energy domain as being “probably the definitive work on Darrieus technology”, his book on the Darrieus wind turbine design, one of the few that exist on this subject, was also translated into Japanese. As a direct consequence of his hands-on experience in the wind energy domain, he is also a respected specialist in the problems concerning the economic, environmental and social aspects of the wind power.
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Show Only Primary Areas of Expert Consulting
Secondary Expertise
aeronautical engineering, aerospace engineering, air flow, air motor, air transportation, aircraft, aircraft design, airflow visualization, airframe design, Bernoulli equation, Bernoulli theorem, critical speed, drag, drag reduction, energy conservation, energy-efficient wind water pumping, fluid behavior, fluid boundary layer, fluid channel, fluid compressibility, fluid compression, fluid flow measurement, fluid mechanics, fluid mechanics mathematical modeling, fluid mechanics modeling, fluid system dynamics, friction, gas mechanics, gas property, home wind energy, hydromechanics, hydrostatic pressure, hydrostatics, interfacial fluid mechanics, interfacial tension, internal fluid mechanics, laminar flow, laser Doppler anemometer, liquid flow, liquid flow through a nozzle, liquid state mechanics, low surface tension, mass flow quantity, Navier-Stokes equation, Newtonian flow, perturbed turbulent boundary layer, pipe flow, pneumatics, pressure drop, renewable energy system, renewable resource, terminal velocity, thin liquid film-gas flow interaction, turbulent boundary layer, turbulent boundary layer drag reduction, turbulent flow, variable geometry aircraft, viscosity, vortex, wake, water flow, wind measurement, wind turbine generator
Basic Expertise
aircraft control system design, aircraft decompression, aircraft electrical insulation design, aircraft manufacturer, aircraft manufacturing, airframe stress analysis, airframe wiring process, airline system, avionics engineering, cryogenic fluid flow, cryogenic heat transfer, dynamics, electric energy generation, fluid mechanics permeability coefficient, fluid-power transmission, gas flow through a nozzle, hydraulics, hydrodynamics, hydrofoil boat, internal flow, mixed flow, open-channel flow, sail, surface tension, turbulent flow pattern recognition | | |
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Degree |
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Subject |
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Institution |
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Honors |
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1974
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PhD
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Aerodynamics
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Polytechnic University of Bucharest
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1965
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BS
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Aerospace Engineering
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Polytechnic University of Bucharest
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Magna Cum Laude
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| Years |
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Employer |
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Department |
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Title |
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Responsibilities |
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1984 to
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(Undisclosed)
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Mechanical Engineering
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Professor
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He was J.-A.Bombardier Aeronautical
Chair Professor (1990-2005).
He is leader of a research group
including 2 research associates, 3 graduate students and several undergraduates. He is teaching undergraduate and graduate courses on Subsonic and Unsteady Aerodynamics, Fluid Dynamics and Wind Turbines.
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1979 to 1984
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IREQ (Research Institute of Hydro-Quebec)
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Energy Production
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Senior Scientist
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He was involved in the research on the
Vertical Axis Wind Turbine (VAWT) and he developed an original computer code for calculating aerodynamic loads and performance of VAWT.
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1984 to 1985
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IREQ (Research Institute of Hydro-Quebec)
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Energy Production
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Expert Consulting
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He provided technical advices on the
Wind Energy Projects of the
Research Institute of Hydro-Quebec.
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1976 to 1979
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(Undisclosed)
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Mechanical Engineering
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Research Associate
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He was involved in the research projects
on: the aircraft wing with variable geometry and wind energy.
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1973 to 1976
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Polytechnic University of Bucharest
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Mechanical Engineering
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Lecturer
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He was teaching undergradute courses
on solid mechanics and fluid mechanics.
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1967 to 1973
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Polytechnic University of Bucharest
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Mechanical Engineering
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Assistant Professor
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Associations/Societies
AIAA Associate Fellow (1998),
CASI (Canadian Aero Space Institute),
Order of Engineers of Quebec (1979),
American Romanian Academy of Arts and
Sciences (ARA) Member (1988) and President (1998)
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Licenses/Certifications
P.E. (Order of Engineers of Quebec)
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Professional Appointments
Associate Editor of International Journal of
Rotating Machinery;
President of the American Romanian Academy of Arts and Sciences (ARA)
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Awards/Recognition
He holds 6 titles of Doctor Honoris Causa, Prix d'Excelence from Ecole Polytechnique
Montreal (1987), Prix du Ministre for his book (2000),
Prize for"Oustanding Collaborative University-Industry Research" AIAC Aerospace Forum, Ottawa 2000
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| Publications: |
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Publications and Patents Summary
He has published: over 250 journal articles,
conference proceedings papers and technical reports, 1 patent and 6 books on Subsonic Aerodynamics, Wind Turbine Design and one book proposal on Aircraft
Icing.
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Selected Publications and Publishers
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- Proceedings of the Workshop on CFD Methods for SLD Simulation, organized by NASA and ONERA
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- Proceedings of the EXPO World Conference on Wind Energy, Renewable Energy
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- AIAA Journal of Aircraft, American Institute of Aeronautics and Astronautics (AIAA)
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- Polytechnic International Press
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- International Polytechnic Press, Montreal
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| Government Experience: |
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| Years |
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Agency |
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Role |
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Description |
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1998 to
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Natural Sciences and Engineering Research Council of Canada (NSERC)
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Reviewer
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Since 1998 the Expert was continuously involved in the review of research proposals submitted to NSERC for funding (about 12), in domains related to his main expertise areas.
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1999 to 2003
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FCAR Quebec
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Reviewer
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He evaluated research proposal submitted for funding to the Quebec Research Agency
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1993 to 1995
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SANDIA National Laboratories, Albuquerque, NM, USA
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Expert consulting
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He developed a new 2D dynamic stall model to be used in the aerodynamic analysis of the Vertical Axis Wind Turbines
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| Selected Consulting Examples: |
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He was invited in 2004 to work for nine months as a consulting scientist in the Renevable Energy Laboratory of the Tottori University in Japan
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Since 2001, Expert has been a consultant for the design of new vertical axis wind turbines developed by ECOFYS Co. in Utrecht, Netherlands.
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Starting from 1990, as a Chair holder, he provided technical advice to Bombardier Aerospace Co. in aircraft icing & anti-icing, boundary layer stability and control and aerodynamic drag prediction.
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For over 15 years (1981 - 1996) he collaborated with SANDIA National Laboratories, Wind Energy Division, as a consultant on vertical axis wind turbine aerodynamics, and participated to periodic technical meetings regarding the ongoing and future research projects in wind energy.
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Recent Client Requests:
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Aerodynamics Expert for consulting on Wind Turbine Design.
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Wind energy independent expert for consulting on bid proposal preparation to reply to an RFP for engineering services to determine feasibility for constructing one wind turbine for a town municipality.
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Expert in vertical axis wind turbine design for consulting on VAWT blade design.
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Expert in vertical wind turbines for consulting on Ontario province report on wind turbine development.
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Expert in Rooftop Generation of Power.
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Expert in wind turbine design in Canada for consulting on VAWT design.
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Aerodynamics expert for consulting on inserter binding application for magazine production.
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Expert is free.
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Recent Litigation Client Requests:
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Wind turbine expert for consulting on wind turbine patents, legal documents, and expert reports.
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Expert in consulting on wind turbine blades maitanance
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Wind energy expert for consulting on Wind Energy - turbine design, safety and warnings.
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Electrical engineering and wind turbine expert for consulting on wind turbine crash case.
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Click the green button above to contact
Expert for a free initial screening call regarding expert testimony,
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A few litigation needs include product liability, personal injury, economic loss, intellectual property
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| International Experience: |
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Country / Region |
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Summary |
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2004 to 2005
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Japan
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In 2004 the Expert was invited to perform research work, during a sabbatical leave, in the Laboratories of Tottori
University, Japan. The research he was involved in there was mainly related to the study of the influence of the periodically varying wind and the blade inclination angle on the performances of straight-bladed vertical axis wind turbines.
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2005 to 2005
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Moldova
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Over four months he collaborated with a research team from the Technical University of Moldova to improve the dynamic-stall models which are included in the vertical axis wind turbine computer codes.
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1982 to 1990
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France
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For more than eight years he conducted several series of experiments at IMST Marseilles, France, on the structure of the flow through a Darrieus H-type rotor, using LDV measurements and flow visualization techniques.
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1981 to 1996
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USA, New Mexico
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SANDIA National Laboratories, Wind Energy Division, used the aerodynamic and performance prediction computer programs developed by the expert for designing Darrieus wind turbines and invited him to assist with the codes implementation and training.
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| Language Skills: |
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| Foreign Language |
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Description |
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English
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Expert can read English very well and write and speak well, being able without any problem to prepare his papers and to present them at the conferences he attends.
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French
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His speak, read and write skills in French are at a very good level. For over 30 years he has prepared research reports and teached at university level in this language.
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Romanian
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Mother tongue.
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Russian
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The expert can read and write Russian fairly well but his ability to speak Russian is rather limited.
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| Additional Skills and Services: |
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Training/Seminars
From 1987 to date Expert has coordinated as a faculty advisor the Ecole Polytechnique de Montreal student team for the annual AIAA Student branch competition in the North-East region.
Chairman of ARA Congress -1990 and 2001 in Montreal;
Chairman of The First International Bombardier Workshop - Montreal 1993;
Chairman of AIAA Student Regional Conference - Montreal 1989
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Education
