Numerical Research νt-92 Turbulence Model for Axisymmetric Jet Flow
Abstract
In this work, we verify the turbulent Secundov νt-92 model for various jets. Based on this model, numerical studies of an axisymmetric subsonic cold, hot, and transonic jet are carried out. For the numerical implementation of the equations of hydrodynamics are written in the Mises variables and an implicit absolutely stable scheme of the second order of accuracy in the transverse and first order in the longitudinal directions is used. To compare the obtained numerical results, we used experimental data from the NASA database, which presents not only experimental data of recent years, but a comparative analysis of many turbulence models. Comparisons were made on the propagation of the axial flow velocity, along the profile of turbulent stresses and longitudinal velocity in various sections. It is shown that the model quantitatively describes well the main parameters of incompressible and compressible turbulent jets. It is shown that the Secundov νt-92 model is less prone to the so-called "anomaly" of the circular jet, the essence of which is that many other RANS models give a very strong expansion for axisymmetric jets.
