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我们在物体-空泡表面上分配源点,利用迭代法解重力场中带有混合边界条件的通过旋成体的势流。为了避免空泡闭合条件所带来的计算困难,只好在空泡闭合处至物体底部部分加入一个常压力边界条件。在不同的Froude数和底部压力系数下,我们将计算出的物体底部附近的压力分布和空泡外形与风洞和水下自由飞行状态下所得的测量结果进行了比较。计算和试验的一致性说明了计算方法是合理的。对于5°的锥体所提方法与已有的基于轴向奇点分布和细长体假设的解析解进行了比较。
We assign source points on the object-bubble surface and iteratively solve the potential flow through the spinosome with mixed boundary conditions in the gravitational field. In order to avoid computational difficulties caused by cavitation closure conditions, an atmospheric pressure boundary condition must be added to the bottom of the object at the closed cavity. Under different Froude numbers and bottom pressure coefficients, we compared the calculated pressure distribution near the bottom of the object and the shape of the cavities with those obtained under wind tunnel and underwater free flight conditions. The consistency of calculation and experiment shows that the calculation method is reasonable. The proposed method for the cone of 5 ° is compared with the existing analytical solution based on the axial singularity distribution and the slenderness assumption.