ANALYSIS OF SIMULATION DATA OF A SUPERSONIC FLOW IN A SHORT NOZZLE WITH A NOZZLE

Abstract

In this paper, we analyzed the influence of the geometric parameters of a shortened nozzle when operating under various conditions - at sea level (at Р=1 bar) and upper atmosphere (Р= 0.1 bar). The influence of geometrical parameters of the nozzle, pressure at the inlet, and the environment on the impulse characteristics of the flow are considered. It is shown that the momentum factor decreases with decreasing inlet pressure, but with increasing flight altitude, i.e. a decrease in the pressure of the external environment, the momentum coefficient decreases to a certain value, and then increases again. This character of the dependence is explained by the wave structure of the flow in a shortened nozzle. The study of simulation data can be used to create new types of nozzles for rocket and space technology.