基于延迟脱体涡模拟方法对Gurney襟翼分离流动的数值模拟

摘要

采用基于k-ωsst湍流模型的延迟脱体涡模拟DDES（Delayed-Detached Eddy Simulation）混合算法对施加Gurney襟翼的两段翼进行了数值模拟，重点讨论了DDES与非定常雷诺平均方法URANS （Unsteady Reynolds-Averaged Navier-Stokes）对Gurney襟翼分离绕流的数值模拟能力，并与试验结果进行对比。计算结果表明DDES方法结合了URANS与大涡模拟LES（Large Eddy Simulation）的优点，在分离流场脱体涡模拟方面具有优势，在Gurney襟翼的流场研究中体现出更强的模拟能力。%Turbulent lfow over a Gurney lfap is simulated using a hybrid method DDES (Delayed-Detached Eddy Simulation) based on k-ωsst model. The method combines the power URANS in the attached layers with the power of LES in separated lfow regions. The numeri-cal results indicate that the DDES model can forecast the separation and the vortex flow more accurately and pro-vide more reasonable force coefifcients. The results show DDES methods are very efifcient to deal with the separated lfow over Gurney lfap.