脉冲爆震发动机净推力系数研究

Experimental Investigation on Net Thrust Charactertistics of Pulse Detonation Engine

研究脉冲爆震发动机 ( Pulse detonation engine,PDE)净推力系数的变化规律。净推力系数为 PDE发出的净推力与毛推力的比值 ,通过运用以试验结果为基础的简化假设和经验公式 ,推导出计算模型 ,并通过该模型分别计算了管径为 1 5 0 mm、长度为 1 .2 m和管径为 1 80 mm、长度为 1 .6,1 .8m的带不同结构类型气动阀的 PDE的净推力系数 ,得出不同结构气动阀的 PDE净推力系数随飞行速度的变化曲线 ,用管径为 1 5 0 mm、长度为 1 .2 m,带径向双旋流气动阀的 PDE性能试验进行了验证 ,试验证明该简化计算模型对实际

The net thrust coefficient is defined as the ratio of net thrust to the gross integrated on wall thrust.Based on experimental results and experiential formula a mathematical model for the coefficient is formulated. This model is used to estimate the net thrust of an engine with diameter of 150 mm and 1 2 m long and engines with diameter of 180 mm and lengthes of 1 6 m and 1 8 m with different types of aerovalve. Curves displaying the variation of  with flight speed are obtained and confirmed by the performance experiments of an engine with diameter of 150 mm and 1 2 m long.