Modeling shock-wave cells at the initial region of the underexpanded supersonic jet

Supersonic underexpanded air jet modeling based on the QGD algorithm is carried out. The process of jet flow evolution and the formation of unsteady flow regions are investigated to obtain a good qualitative and quantitative agreement of the results with experimental and simulation data, known from the literature. The QGD algorithm is shown to enable studies of the structure of shock-wave cells at the initial region of the flow and to describe the general character of the turbulent jet.