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在一台内径61 mm、长度1140 mm的气动阀式脉冲爆震发动机(PDE)上,进行了爆震管热负荷的测量计算,主要采用了两种换热模型:一是自然对流和热辐射模型;二是强迫对流模型.在两种方式下,爆震管的热负荷随频率的变化关系基本相同,即随频率升高而热负荷增大,但频率增加两倍热负荷增加却不止两倍.此外,在方式二的情况下,还得到煤油蒸发率随频率的变化关系,为PDE蒸发器设计提供参考.
In a pneumatic valve pulse detonation engine (PDE) with an inner diameter of 61 mm and a length of 1140 mm, the calculation of the heat load of the detonation tube was carried out. Two kinds of heat exchange models were mainly used: one is natural convection and heat radiation Model, and forced convection model. In both cases, the relationship between the heat load and the change of the detonation tube is basically the same, that is, the heat load increases with the increase of the frequency, but the increase of the heat load is more than twice In addition, in the case of the second method, the relationship between the evaporation rate of kerosene and frequency is also obtained, which provides a reference for the design of PDE evaporator.