运用数值模拟方法,通过改变推力室螺旋通道结构参数,对太阳热发动机(STP)能进行了详细的研究,深入分析了STP的推力,比冲、质量流量变化情况,得出了一般情况下螺旋通道的长度,宽度参数范围,同时比较了单、双通道的优缺点,所得的结论对STP推力室/热吸收室推进剂加热通道结构设计具有指导意义. By means of numerical simulation, STP can be studied in detail by changing the structural parameters of spiral chamber of thrust chamber. Thrust, specific impulse and mass flow changes of STP are analyzed in depth. In general, Channel length and width parameter range, at the same time compared the advantages and disadvantages of single channel and double channel. The conclusion is of guiding significance for the structural design of STP thrust chamber / heat absorption chamber propellant heating channel.