论文部分内容阅读
运用非结构动态嵌套网格技术,通过求解三维非定常Euler方程,对螺旋桨飞机的螺旋桨滑流进行了真实数值模拟.动态嵌套网格方法通过建立运动区子域网格来模拟螺旋桨的旋转运动,静止的机身包含在静止区网格中,有效解决了螺旋桨滑流模拟中的相对运动问题.采用双时间方法求解控制方程,在每一个物理时间步上运用经典四步Runge-Kutta方法进行迭代计算,得出非定常流场.计算了螺旋桨飞机的螺旋桨拉力系数以及不同工况下的非定常流场,对滑流的影响进行了分析,并和相关实验数据进行了对比,结果比较一致.
The non-structural dynamic nested grid technique is used to simulate the projectile slip of a propeller plane by solving three-dimensional unsteady Euler equations.The dynamic nested grid method simulates the rotation of the propeller by establishing a grid of subdomains in the moving region The moving and stationary body is contained in the grid of quiescent zone, which effectively solves the problem of relative motion in the propeller slipstream simulation.Using the double-time method to solve the governing equations, a classical four-step Runge-Kutta method is applied to each physical time step The unsteady flow field is obtained by iterative calculation, the propeller pull coefficient of propeller aircraft and unsteady flow field under different conditions are calculated, and the influence on slip slip is analyzed and compared with the relevant experimental data. The results are compared Consistent.