Predicting Stall Delayed Performance of Rotating HAWT and Its Inherent Mechanical Driving Forces
Rotating HAWT exhibits special stall delayed performance since its blade boundary layer in 3D rotating environment develops differently from those measured aerodynamic characteristics in 2D wind tunnel. A conceptual HAWT analysis model is proposed in this paper to predict flow’s pressure distribution upon blade surfaces and the lifting forces along blade span under stalling conditions. Compared with 2D static measured data, delayed stall is captured with evident phenomenon and exhibited the validated model analysis ability. From the results it is also shown that along blade profile Coriolis force has the same magnitude to centrifugal force, while Coriolis one is connected with the stalled relative flow. Different levels of both forces along blade span result in varied spanwise boundary flow pattern. Three dimensional delayed stall can then be explained in quantity for rotating HAWT blade profile.
Stall delayed HAWT Boundary layer Span wise flow
DAI Ren Haiang WANG
College of Power Engineering, University of Shanghai for Science and Technology Shanghai, 200093，China
国际会议
2007杭州国际动力工程会议(The International Conference on Power Engineering 2007)
杭州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）