Study of the dependence of an air jet shape on pressure in a Laval nozzle

The article considers the dependences of the pressure and velocity ratios typical for the Laval nozzle. The dependence of the shape and speed of the air jet on the pressure change of the ejecting jet is determined. The regularity of displacement of pressure extremes and reduction of their density along the length of the nozzle is shown. The change in the frequency of pulsations of the jet with an increase in the velocity of the gas flow is described. CFD modeling and its control parameters are considered. Approximate analytical solutions, simple in form, were obtained. They made it possible to carry out studies of the pressure state in the range of the longitudinal coordinate along the length of the nozzle.