CAJ | 학술논문

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。
채용5계정도적유한차분격식 WCNS-E-5，대제형익고승력구형진행료수치모의。연구료망격수렴성， WCNS 격식대망격적의뢰성경소。득도료여실험결과상일치적기동특성화압력분포。통과여일사저명 CFD 연건적계산결과비교표명，상비이계격식，WCNS 격식모의고승력구형유명현우세，특별재실속영각부근대류동결구적각화경준학。동시，험증료정서대복잡외형적모의능력화로봉성。
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 differ-ence 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.