Finite-Difference Investigation of Axisymmetric Inviscid Separated Flows with Infinitely-Long Cusp-Ended Stagnation Zone. Flow around a Sphere

摘要

The classical Helmholtz problem is applied for modelling the axisymmetricinviscid cusp-ended separated flow around a sphere. Two coordinate systems areemployed: polar for initial calculations and parabolic the latter being moresuitable for investigation of infinitely-long stagnation zones. Scaledcoordinates are introduced and difference schemes for the free-stream equationand the Bernoulli integral are devised. The separation point is not initiallyprescribed and is defined iteratively. A separated flow with vanishing dragcoefficient is obtained.