|제목(국문)||풍차 날개의 틈새에 패들휠을 사용하는 새로운 능동 유동제어 방법에 대한 유동해석|
|제목(영문)||CFD ANALYSIS OF A NEW ACTIVE FLOW CONTROL METHOD FOR WIND TURBINE AIRFOILS USING A PADDLE WHEEL INSIDE THE SPLIT OF AIRFOIL|
(Amir Maleki ,Department of Aerospace Engineering, K.N. Toosi University of Technology, Tehran, Iran ) ▷공저자네트워크등록하기
(Morteza Ramezani ,Faculty of New Sciences and Technologies, University of Tehran ) ▷공저자네트워크등록하기
허남건 (Nahmkeon Hur ,서강대학교 기계공학과 ) ▷공저자네트워크등록하기
In the following years, the wind energy industry will maintain its surge during the last few decades. Meanwhile, horizontal axis wind turbines (HAWT) are the most prominent one among other wind turbines. Accordingly, enhancing blade aerodynamic performance should be the main part of study over this type of turbines. For this purpose, various active and passive flow control methods are being extensively investigated. Investigating new hybrid method is the main aim of this paper. Therefore, in this present study a novel idea, that uses a paddle wheel which is located inside the split, is investigated. This new configuration is based on the split method and the rotation of a paddle wheel that provides pulsatile flow inside the split. The flow then gets injected into the bulk flow over the airfoil, causing hybrid flow control effects. Optimized split geometry of S809 airfoil has been selected and then a paddle wheel is placed inside the split. First, the effect of split width on passing flow and separation zone was investigated. Second, the effect of rotational speed of the paddle is discussed. To this end, 2D CFD simulations using SST-k-ω turbulence model have been performed. The simulations have been conducted for a wide range of angles of attack (AOA). The results are discussed in the form of aerodynamics force coefficients as well as streamlines to compare the size of the separation area at higher angles of attack.
|keyword||Flow control, Paddle wheel, Wind turbine, S809 airfoil, CFD