在有喷射的情况下,调节固体发动机的额定推力有三种方法:1、在喷管流中喷射附加质量流;2、使喷射流与推进剂的燃烧产物起化学反应;3、改变推进剂表面上的火焰结构.前二种方法已由Reichard论叙过.虽然这些方法的效应可以通过计算来预估,但所有有关固体药表面率与燃烧室压力之间的关系式都是建立在试验基础上,没有一个完整的火焰理论可用来解释和预估推进剂性能. In the case of injection, there are three ways to adjust the rated thrust of a solid engine: 1. injecting an additional mass flow in the nozzle flow; 2. chemically reacting the injection flow with the propellant combustion products; 3. changing the propellant surface The first two methods have been reviewed by Reichard Although the effects of these methods can be estimated by calculation, all the relationships between solid surface rates and combustor pressures are based on experimental basis No complete theory of flame can be used to explain and predict propellant performance.