Abstract

Info

Title:: Investigation on natural circulation precooling for cryogenic liquid rocket engine

Author(s):: CHENG Xiang-hua¹; CHEN Er-feng²; LI Yan-zhong³; 1. Xi’an Aerospace Propulsion Test Technique Institute, Xi’an 710100, China;

Keywords:: titanium alloy injectordiffusion brazingfailure analysisimprovement

Abstract:: The circulation precooling process of liquid rocket engine is involved with the complicated flow regimes transform and heat transfer that are affected by many factors. The one-dimensional homogeneous balance fluid dynamic model was adopted to analyze the distribution of various parameters of cryogenic propulsion in the precooling pipeline under steady state by discretized method, and investigate the effects of return location, ullage pressure and liquid condensate depression on rocket engine precooling. The results indicate the relative optimal location of return inlet is within 4 m~6 m above the bottom spherical cap, and the engine precooling performance is restained by increase of the ullage pressure and liquid condensate depression.