Study on Tail-flame Impart Effect of Double Seat Catapult Rocket Package
In order to provide important reference for research on the safety protection of the later ejeted pilot,an analysis was conducted on the impact on the wake field of the seat rocket package of a parallel twin seater fighter jet on the pilot later ejected.The complex multi-field interaction between the wake field and the aircraft cabin during the unsteady separation process is studied in this paper,which involves the impact and combustion of the rocket bag tail flame jet in the confined space of the cabin.In this paper,the complex multi-field interaction between the jet flow field and the aircraft cabin during the unsteady separation process is studied.The impact and combustion of the jet flow in the confined space of the aircraft cabin are involved.Based on computational fluid dynamics(CFD)method,a mathematical and physical model of the gas flow field of a rocket pack containing the moving boundaries of man-chair system and nacelle during ejection is established.This paper analyzes the interaction between the tail flame of the rocket package of the seat of the first ejection occupant,the cabin and the seat,explores the distribution characteristics of parameters such as velocity,temperature and pressure of the high temperature gas flow field,and studies the impact effect of the tail flame gas flow on the later ejected crew occupant during the ejection process,and obtains the variation rules of the pressure and temperature of the pilot's body surface.The research results are of great significance in the later ejected pilot occupant protection design of parallel two-seat ejection system.
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