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 Expert  723608

Expert in Wind Energy, Wind Turbine Design, Aircraft Icing and Anti-icing, Wind Turbine Icing, Aerodynamics

Available for your Consulting and Expert Witness Needs

Education Work History Career AccomplishmentsPublicationsConsulting Services Expert Witness

Summary of Expertise: Listed with other top experts in: 
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.

fluid dynamics


aerodynamic characteristics


applied aerodynamics


aircraft icing


wind turbine icing

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.

wind energy


wind energy system


wind load




wind turbine design

Show Secondary and Basic Areas of Expertise

Often requested
with this expert:

Electric Motors, Generators, Wind Energy, Voltage...
Motor and Generator Design and Development
Wind Turbine Design and Performance Analysis
Renewable Energy Development, Ethanol, Wind Energy, Waste...

Year   Degree   Subject   Institution   Honors
1974   PhD   Aerodynamics   Polytechnic University of Bucharest  
1965   BS   Aerospace Engineering   Polytechnic University of Bucharest   Magna Cum Laude

Work History:
Years   Employer   Department   Title   Responsibilities

1984 to




Mechanical Engineering




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.

1979 to 1984


IREQ (Research Institute of Hydro-Quebec)


Energy Production


Senior Scientist


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.

1984 to 1985


IREQ (Research Institute of Hydro-Quebec)


Energy Production


Expert Consulting


He provided technical advices on the Wind Energy Projects of the Research Institute of Hydro-Quebec.

1976 to 1979




Mechanical Engineering


Research Associate


He was involved in the research projects on: the aircraft wing with variable geometry and wind energy.

1973 to 1976


Polytechnic University of Bucharest


Mechanical Engineering




He was teaching undergradute courses on solid mechanics and fluid mechanics.

1967 to 1973


Polytechnic University of Bucharest


Mechanical Engineering


Assistant Professor


Career Accomplishments:

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)


P.E. (Order of Engineers of Quebec)

Professional Appointments

Associate Editor of International Journal of Rotating Machinery; President of the American Romanian Academy of Arts and Sciences (ARA)


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

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.

Selected Publications and Publishers  
 - Proceedings of the Workshop on CFD Methods for SLD Simulation, organized by NASA and ONERA  
 - Proceedings of the EXPO World Conference on Wind Energy, Renewable Energy  
 - AIAA Journal of Aircraft, American Institute of Aeronautics and Astronautics (AIAA)  
 - Polytechnic International Press  
 - International Polytechnic Press, Montreal  

Government Experience:
Years   Agency   Role   Description
1998 to   Natural Sciences and Engineering Research Council of Canada (NSERC)   Reviewer   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.
1999 to 2003   FCAR Quebec   Reviewer   He evaluated research proposal submitted for funding to the Quebec Research Agency
1993 to 1995   SANDIA National Laboratories, Albuquerque, NM, USA   Expert consulting   He developed a new 2D dynamic stall model to be used in the aerodynamic analysis of the Vertical Axis Wind Turbines

Consulting Services:
Selected Consulting Examples:
  • 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
  • Since 2001, Expert has been a consultant for the design of new vertical axis wind turbines developed by ECOFYS Co. in Utrecht, Netherlands.
  • 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.
  • 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.
Recent Client Requests:
  • Aerodynamics Expert for consulting on Wind Turbine Design.
  • 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.
  • Expert in vertical axis wind turbine design for consulting on VAWT blade design.
  • Expert in vertical wind turbines for consulting on Ontario province report on wind turbine development.
  • Expert for consulting on Aerodynamic opportunity - Unique tethered aircraft.
  • Expert in Rooftop Generation of Power.
  • Expert in wind turbine design in Canada for consulting on VAWT design.
  • Aerodynamics expert for consulting on inserter binding application for magazine production.
Click the green button above to contact Expert for a free initial screening call regarding your expert consulting needs.  Expert is available for consulting to corporate, legal and government clients.  Remember, your initial screening call to speak with Expert is free.

Expert Witness:
Recent Litigation Client Requests:
  • Wind turbine expert for consulting on wind turbine patents, legal documents, and expert reports.
  • Turbine blade expert for consulting on Wind Turbine Blade Damper Tank.
  • Expert in consulting on wind turbine blades maitanance
  • Wind energy expert for consulting on Wind Energy - turbine design, safety and warnings.
  • Vertical axis wind turbine
  • Yaw and Flow Fields Expert
  • Electrical engineering and wind turbine expert for consulting on wind turbine crash case.
Click the green button above to contact Expert for a free initial screening call regarding expert testimony, litigation consulting and support, forensic services, or any related expert witness services.  A few litigation needs include product liability, personal injury, economic loss, intellectual property (patent, trademark, trade secret, copyright), and insurance matters.  Remember, your initial screening call to speak with Expert is free.

International Experience:
Years   Country / Region   Summary
2004 to 2005   Japan   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.
2005 to 2005   Moldova   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.
1982 to 1990   France   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.
1981 to 1996   USA, New Mexico   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.

Language Skills:
Foreign Language   Description
English   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.
French   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.
Romanian   Mother tongue.
Russian   The expert can read and write Russian fairly well but his ability to speak Russian is rather limited.

Additional Skills and Services:

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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