Iopara Inc

IOPARA offers expert services in fluid dynamics and applied aerodynamics, especially in the field of advanced wind technology and has completed professional works for clients in more than 15 countries on several projects including small and large scale Vertical Axis Wind (or Water) Turbines, as well as simulation environment for the IEC certification of VAWT according to the IEC 61400 standard. The founder, Dr. Ion Paraschivoiu, has over 35 years of experience in conducting research, teaching and in providing services for major companies and research centers worldwide on problems related to wind turbine aerodynamics, performance prediction and optimal design, aircraft icing and anti-icing. He has developed world renowned simulation and analysis softwares. The CARDAAV, CARDAAX and CARDAAS-1D/-3D computer codes, based on the Double-Multiple Streamtube model, have been constantly improved in order to produce an efficient software package appropriate for the needs of VAWT designers and more than 100 authors have cited the research work related to these computer codes. CARDAAV is a computer code based on the Double-Multiple Streamtube model with variable upwind and downwind induced velocities in each streamtube (DMSV model). A unique feature of the CARDAAV code, apart from the two actuator disks model, is that additional parameters or input options can be included, for example: to analyze the influence of the blade geometry, the airfoil type and the secondary effects such as the rotating tower, the presence of struts and aerodynamic spoilers on the Darrieus turbine. Those capabilities make CARDAAV a very attractive and efficient design and analysis tool. Therefore, although based on a momentum model, the results obtained with the DMSV model, supplemented with the above mentioned corrections that are available in CARDAAV, are in good agreement with the experimental data.