关键词: 火箭发动机;排气火焰;流场;化学成分;电磁参量;计算方法

Abstract: A computational modeling technique and prediction method are presented for calculating two-dimensional profiles of chemical species mole fraction and electrical properties of rocket exhaust plumes. A comprehensive computer code has been programmed. The chemical reactions and radar attenuation which occur.in a rocket plume can be predicted more truly by using this code. It is suitable to calculating parameters of rocket plumes under a near complete-expansion condition and for smokeless (or reduced smoke) propellant apply-cation. The calculation results indicate that evident errors will occur for prediction of chemical and electrical parameters in the plume flowfield if the chemical reactions in the plume are ignored.

Key words: Rocket engine;Exhaust flame;Flow field;Chemical composition;Electromagnetic property;Calculation method