Numerical investigations of turbulent flows with free and restricted shock separation

Аuthors

Ivanov I. E.^1*, Kryukov I. A.^2**

1. Lomonosov Moscow State University, 1, Leninskie Gory, Moscow, 119991, Russia
2. Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences, 101-1, prospekt Vernadskogo, Moscow, 119526, Russia

*e-mail: ivanovmai@mail.ru
**e-mail: kryukov@ipmnet.ru

Abstract

The article is devoted to numerical study of separation of turbulent boundary layer from nozzle wall for supersonic viscous flow. Interaction of shock wave with boundary layer is studied mainly for internal flows. Flow in plane, cone and profiled axisymmetric nozzles is considered. Detailed study of flow structure and some its parts (separation, mixing, reattachment, recirculation flow) is performed. Space-time correlations between flow parameters in different flow zones are investigated. Conditions of realization oj restricted and free shock separation in profiled nozzles, hysteresis of separation type during increasing or decreasing entrance pressure, possibilities of control of separation type and location of separation point are studied. Numerical simulation of turbulent flows in dual bell nozzles is considered for wide external pressure range.

Keywords:

Navier-Stokes equations, viscous flow, turbulence, nozzle jet, free shock separation, restricted shock, separation