CAJ | 학술논문

基于二维雷诺平均Navier-Stokes(RANS)方程,耦合e~N数据库方法进行流动转捩判断,采用SA湍流模型计算了风力机专用翼型DU91-W2-250的气动特性.得到了雷诺数R_e=1.0×10~6时,攻角在-11°～12°范围内该翼型的升力和阻力特性曲线及压力分布.通过对全湍流计算结果、耦合转捩判断的计算结果及实验数据的对比,表明考虑转捩因素后的计算结果与实验结果吻合更好,说明要准确模拟风力机翼型的绕流,必须考虑转捩影响.
기우이유뢰낙평균Navier-Stokes(RANS)방정,우합e~N수거고방법진행류동전렬판단,채용SA단류모형계산료풍력궤전용익형DU91-W2-250적기동특성.득도료뢰낙수R_e=1.0×10~6시,공각재-11°～12°범위내해익형적승력화조력특성곡선급압력분포.통과대전단류계산결과、우합전렬판단적계산결과급실험수거적대비,표명고필전렬인소후적계산결과여실험결과문합경호,설명요준학모의풍력궤익형적요류,필수고필전렬영향.
Based on two dimensional Reynold Averaged Navier-Stokes(RANS) equations coupled with the e~*.The coefficients of lift and drag as well as the pressure distribution were computed with the airfoil's angle of attack changing from -11° to 12°.The comparison between fully turbulent calculation, computed results incorporating tran-sition prediction and experimental data showed that transitional predicted results were closer to the experi-mental values.It's necessary to take transition into account in order to simulate the flow around wind turbine airfoil more accurately.