摘要
采用5阶精度的有限差分格式WCNS-E-5,对梯形翼高升力构型进行了数值模拟。研究了网格收敛性,WCNS格式对网格的依赖性更小。得到了与实验结果相一致的气动特性和压力分布。通过与一些著名CFD软件的计算结果比较表明,相比二阶格式,WCNS格式模拟高升力构型有明显优势,特别在失速迎角附近对流动结构的刻画更准确。同时,验证了程序对复杂外形的模拟能力和鲁棒性。
High order accuracy numerical simulations for flows of high lift trapezoidal wing configuration were performed by solving Navier-Stokes equation together with SST two-equation turbulence model.In the study,WCNS-E-5 scheme was utilized in the discretization of convection terms,while 6 th order central difference scheme for viscous term.Grid convergence result was obtained,which was in good agreement with test data,and WCNS scheme was less dependent on mesh density than 2 nd order scheme.Compared with other computational results obtained by typical CFD solvers,both the force coefficients and the surface pressure distributions given in this paper shown better accordance with the test data,and more reasonable prediction of flow structure near stalling was obtained.As revealed from these results,WCNS scheme took higher ac-curacy order and was more suitable for simulation of flow around high lift configurations than 2 nd order scheme.The capability and the robustness of the program to simulate complex high lift configurations were confirmed.
出处
《空气动力学学报》
CSCD
北大核心
2014年第4期439-445,共7页
Acta Aerodynamica Sinica
基金
国家重点基础研究发展计划(973计划
2014CB744803.2)
关键词
高升力构型
高阶精度
数值模拟
失速迎角
high lift configuration
high order scheme
numerical simulation
stalling angle
WCNS
