本文对分轴式坦克燃气轮机的简单循环和回热循环进行了具体分析，同时用严格的气动热力计算方法，考虑到实际循环的各影响因素进行了较精确的热力循环计算，可获得一整套关于压比、涡轮进口温度、回热度对比功和热效率的关系曲线。因此，将有助于坦克燃气轮机设计人员选择最佳化方案；同时也对现有的航空发动机改造为坦克用燃气轮机提供了方向。计算中，因比热是随温度和燃气成分而变化的，本文采用的变比热是考虑了此两者的影响，因此计算精度较高。最后还分析了环境温度、涡轮进口温度、各部件效率、流动阻力、回热度等因素对简单循环和回热循环的比功和循环效率的影响。

This paper presents an analysis of the simple cycle and regenerative cycle of the split shaft gas turbine for tanks in detail and the exact computations of thermodynamic cycle by means of strict calculative methods of the aerother- modynamics with various influences on real cycles considered. A set of curves relating to pressure ratio，turbine inlet temperature and regenerator effectiveness is obtained. Therefore, the paper will be in favour of designers in selecting optimal design and modifying the existing aero-gas turbines to be used on tanks. In calculating, we adopt the variable specific heat which varies with the temperature and the composition of combustion gases. Therefore， a high accuracy in calculations is maintained. Finally，we also analyse the influences of environment temperature, turbine inlet temperature，the efficiency of assemblies，drag in flow and regenerator effectiveness on the specific output and thermal efficiency of simple cycle and regenerative cycle.