应用动网格技术计算着陆过程中缓冲发动机喷流流场

利用Fluent软件对着陆过程中缓冲发动机的喷流流场进行数值计算,发动机与地面相对位置的不断变化使计算域形状不断改变.为了保证计算的正确性,必须采用动网格技术.介绍了实现移动网格的基本方法,并结合使用网格弹性平滑移动和网格重构方法实现了着陆过程中缓冲发动机喷流流场的非定常数值计算;得到了随发动机着陆产生的喷流流场的压强...

Calculation of jet stream flow field of reverse jet engine during landing with dynamic mesh technology

The flow field of a reverse jet engine during landing is numerically calculated with Fluent software.The shape of the computational domain is changed with the relative position of ground and engine.In order to assure the accuracy of calculation,the dynamic mesh technology must be used. The basic methods to realize the mobile grid are described in this paper.The unsteady flow field numerical calculation during the engine landing is achieved by using the methods of grid spring-based smoothing motion and region face remeshing.The static pressure field and velocity field of the jet flow field generated the engine landing.In comparison with the steady calculation of flow field,the results show that the dynamic mesh is applicable for the calculation of jet flow field during the movement of reverse jet engine.The result is significant for the analysis of stirred dust pollution caused by the engine exhaust during landing.