飞机气动力大规模并行模拟研究

Massively Parallel Simulation of Aircraft Aerodynamics

计算流体力学在航空航天领域正发挥着越来越重要的作用,但传统串行计算和小规模并行计算由于其规模和速度的限制,计算精度和计算效率难以满足实际工程要求。在超级计算机上应用计算流体力学软件CFD++,依次对串列双圆柱、30P30N高升力多段翼和翼身组合体的气动力进行大规模并行模拟,输出各种气动条件下的表面压力系数、升力系数和阻力系数,并将模拟结果与实验结果相比较。对比结果显示模拟结果与实验结果相符合,准确地模拟了各类复杂流动,可以对大规模高性能计算进行性能评估,获得较好的并行效率和加速比。

Computational fluid dynamics(CFD)is playing a more and more important role in aerospace.However,due to the limitation of computing scale and speed,traditional serial computingand small scale parallel computingare difficult to meet the requirements of engineering designs.This paper presents simulation results of tandem cylinders,a 30P30N multi-element high-lift airfoil and awing-body configuration,obtained with the CFD application software CFD++on supercomputers.The results of surface pressure coefficient,lift coefficient and drag coefficientget good agreement with the experimental results.All kinds of complex aerodynamic states are accurately simulated.This paper also focuses on the performance evaluation of large-scale parallel computing,andachieves good parallel efficiency and speedup.