Calculation Of Turbomachinery Flow Fields And Design Of Blade Profile On Arbitrarily Rotational Surface

This article focuses on the aerodynamic performance calculation of Vertical-Axis Wind Turbine, the flow characteristics and the design of blade profile on arbitrarily rotational surface. Specific content is divided into three parts.The first part is researching on the aerodynamic performance of Vertical-Axis Wind Turbine. First, considering the effect of the physical time step, far field boundaries and so on, the unsteady numerical method of Vertical-Axis Wind Turbine with high accuracy was formed by using Fluent Commercial Software. On this basis, researching on the geometric parameter of blade numbers, chord length, blade setting angle, blade profile which affected the unsteady flow characteristics of the straight wing Vertical-Axis Wind Turbine. Then, a new aerodynamic performance program of Vertical-Axis Wind Turbine based on the stream-tube model was established by introducing energy loss model. The aerodynamic performance of Vertical-Axis Wind Turbine was respectively comparative studied by using these two methods. The results shown that there was a good consistency of the results of two methods, and both of them had a certain degree of calculation accuracy.The second part is that developing the flow field software of arbitrarily rotational cascades with using Baldwin-Lomax turbulence model and the curvilinear coordinates N-S equation. The discrete of equation was finite volume. Then the local time step and remnant polished technique was used to accelerate the convergence. The reliability of the results was certified by NUMECA Commercial Software. The subsonic and transonic flow characteristics of rotary cascades were analyzed by the self software.The third part is that a new method of arbitrarily rotational surface optimization design, based on old self developed platform, was developed with using algorithm Multiple-tar and the Parameter Design Method of the additional modifier. Used Multiple-target optimization design(pressure ratio, loss, area), this method was adopted for the optimization design of subsonic and transonic arbitrarily rotational profiles, then the aerodynamic performance of the optimization is better than the original, the results shown that the developed software was valid and effective.