Analysis of Attitude Control Method of Flight Machine Based on Gas-Jet Side Force

摘要

This paper analyzes the influence of Laval nozzle geometry parameters on jet properties. The Laval nozzle is used on an attitude control device for gasjet propulsion flight vehicle. Based on the request of the flight vehicle, an attitude control model is proposed and its mechanism is introduced. The jet thrust of Laval nozzle is analyzed with gas dynamics. The surface of Laval nozzle is designed by double-arc method. A mathematical model is built to analyze the influence of the nozzle geometric parameters on the gas flow performances. The results are useful for the design and analysis of the Laval nozzle used on other aerospace projects.