具有无限长尖形端部滞止区的轴对称无粘分离流的差分研究。绕球流动
Finite-Difference Investigation of Axisymmetric Inviscid Separated Flows with Infinitely-Long Cusp-Ended Stagnation Zone. Flow around a Sphere
摘要：
应用经典的Helmholtz问题模拟了轴对称无粘尖端分离绕球流动。采用了两种坐标系：极坐标系用于初始计算，抛物线坐标系更适合于无限长滞止区的研究。引入标度坐标，并设计了自由流方程和伯努利积分的差分格式。分离点不是最初规定的，而是迭代定义的。得到了阻力系数为零的分离流。
英文摘要：
The classical Helmholtz problem is applied for modelling the axisymmetric inviscid cusp-ended separated flow around a sphere. Two coordinate systems are employed: polar for initial calculations and parabolic the latter being more suitable for investigation of infinitely-long stagnation zones. Scaled coordinates are introduced and difference schemes for the free-stream equation and the Bernoulli integral are devised. The separation point is not initially prescribed and is defined iteratively. A separated flow with vanishing drag coefficient is obtained.
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