脉冲爆震轴功率输出装置性能分析与对比
Performance Analysis and Comparison of Pulse Detonation Shaft Power Device

针对采用脉冲爆震燃烧的轴功率输出装置（Pulse detonation shaft power device，PDSPD），在采用PDC （Pulse detonation combustor）特性图的爆震室模型基础上，建立了其总体性能计算模型。研究了PDSPD工作参数对整机性能的影响，结果表明：同一工作频率时，随着增压比增大，PDSPD升功率、轴功率增大，耗油率减小，但单位功率存在最佳增压比；压比不变时，随着工作频率增大，PDSPD升功率增大。对比了不同情况下PDSPD和柴油机、汽油机及涡轴发动机这三种轴功率输出装置的性能，结果表明：相同排量、等功率情况下，PDSPD与现有柴油机耗油率水平接近；与现有汽油机相比，在一定增压比范围内，PDSPD产生相同功率，耗油率更低。与涡轴发动机相比较，PDSPD单位功率可提高38.08%以上，耗油率降低41.42%以上，且其最佳增压比较传统涡轴低，发动机推进性能、经济性和功重比优势明显。
A general performance calculation model was established for the pulse detonation shaft power device (PDSPD) with pulse detonation combustor (PDC). The detonation chamber model used PDC characteristic diagram. The influence of operating parameters on the performance of PDSPD was studied. The study results show that:under constant operating frequency, the power per liter and the shaft power rise with the increase of the pressure ratio, while the specific fuel consumption decreases; there is an optimum pressure ratio when the specific power reaches its maximum value; under constant pressure ratio, the power per liter of PDSPD rises with the increase of operating frequency. The performance of PDSPD and other three shaft power devices were compared under different operating conditions. The comparison results show that the specific fuel consumption level of PDSPD is close to that of the diesel engine at the same displacement and shaft power. Compared with the gasoline engine, PDSPD's specific fuel consumption level decreases with the same shaft power in a certain range of pressure ratios. Compared with the turbo-shaft engine, the specific power of PDSPD increases by more than 38.08%, and the specific fuel consumption decreases by 41.42%. Therefore, the propulsion, economy and thrust weight ratio of the engine are greatly improved