地效翼风洞试验支架干扰数值分析

对地效翼移动地面风洞试验研究中的支架干扰进行了数值模拟和分析。分别对独立地效翼，带支架的地效翼及独立支架进行了数值模拟，计算采用可实现的κ-ε模型，通过求解定常不可压N-S方程，得出地效翼及支架周围流场分布情况。对几组计算结果比较分析了支架和地效翼的空气动力及由于干扰引起的空气动力，发现支架与地效翼之间的相互干扰随着地效翼迎角的增大而增强，如果忽略流动干扰造成的空气动力变化，地效翼升力误差很小，但阻力误差相对较大。同时对有干扰下和没有干扰下的流场进行了对比，分析了支架对翼尖涡流动及绕机翼流动的干扰。翼尖涡在地效翼翼尖附近的发展在0．5犮范围内基本不受支架的干扰；除支架对流场产生干扰外，移动带区域以外的固定地面附近粘性流动也对绕地效翼流动有一定的影响。本研究分析了风洞试验结果的可靠性，为地效翼风洞试验优化设计和地面效应风洞试验研究提供了参考。

Numerical analysis on support interference on wing in ground effect wind tunnel test

The support interference in wing in ground effect wind tunnel test was simulated and analyzed by using computational fluid dynamics（CFD）method.The wing model NACA 0012 was applied.Because of the symmetry the half model was simulated.The cases of separate sup-port,the wing with and without support were simulated separately.The steady imcompressible Navier-Stokes equation and realizableκ-εmodel were used.The semi-infinite computational do-main was calculated.The floor was divided into two different parts,one part was fixed using wall boundary condition,and the other part was moving belt which was set with moving wall bounda-ry condition.Aerodynamic forces of frame and wing with interference were studied by analyzing the aerodynamic interference and flow field interference separately,and we got some conclusions. On one hand,the interference between frame and wing was increased with the increase of the wing’s attack angle.On the other hand,if the interference from flowing air was ignored,the er-ror for lift force of wing was little while that for drag force was large.Then flows with and with-out interference were compared with each other in order to study the effect of interference on de-velopment of wingtip vortex and flow around the wing.Within the area around 0.5c far from wingtip the wingtip vortex was almost not affected.The viscous flow near steady ground outside the moving belt had some effects on the flow around wing.The current study evaluates the relia-bility of test results in wind tunnel test and provides reference for optimization of wing in ground effect wind tunnel test and experimental investigation of ground effect.