Using the proposed fluid solid coupling heat transfer model

numerical simulation was carried out for the transient heat transfer properties of active cooling combustion chambers with thin wall with different geometric sizes of cooling channels. The distribution and evolution of transient temperature field of active cooling combustion chambers were given. Finite element method was adopted to calculate the thermal stress and strain of combustion chamber. The influence laws of geometric parameters of cooling channels and inner volume flow rate of kerosene on the highest temperature and thermal stress of the thin wall of combustion chamber were explored. The results show that

while bringing the kerosene cooling effect into full play

if the cooling channel is closer to the inner wall of the combustion chamber

the larger kerosene volume flow rate is needed. More attention should be paid to the material properties at 10s when the thermal stress of the combustion chamber structure reaches peak value.