关键词: 电火箭发动机;电加热;热交换器;数值分析

Abstract: For the improvement of the specific impulsion in electric rocket, the heating of actuating medium with elctric power is a practical method. In this paper, the flow in a annular passage is investigated. The Patankar-Spalding method is used to solve the parabolic Navier-Stokes equations and the heat losses at the outer wall is considered.Calculations are performed for various ammonia decomposition rates and various nozzle expand ratio, and the selection of heat power and passage length are investigated also.

Key words: Electric rocket engine;Electric heating;Heat exchanger;Numerical analysis