In this report a procedure is considered for fitting shock wave intransonic type-dependent finite-difference relaxation calculations by using the full-potential equation. The iterative line relaxation method for transonic finite-difference (rotated or conservative schemes) calculations can be described by a time-dependent equation. The shock-fitting algorithm presented here depends on this unsteady equation. Written in conservative form, the jump condition is derived, in terms of shock speed. In the steady-state limit, shock speed vanishes, and the steady shock polar is retained. In this way the jump conditions are imposed iteratively and in a manner consistent with the relaxation procedure that is used everywhere else in the flow field. Preliminary results for axisymmetric flows around a sphere are presented. Application of the algorithm to small-disturbance calculations are discussed in the appendic. (DePo)
Shock-fitting for full potential equation
Berechnung von Stosswellen mittels Potentialgleichungen
US Government Research Reports ; Dec ; 1-41
1978
41 Seiten
Report
English