脉冲爆震涡轮发动机性能计算

Calculating Performance of Pulse Detonation Turbo Engine

关键词:  脉冲爆震涡轮发动机  脉冲爆震燃烧室  性能  计算

Key words:  Pulse Detonation Turbo Engine  Pulse Detonation Combustor  Performance  Computation

摘要:

建立了一种基于爆震波ZND理论和循环分析的PDTE性能计算模型-ZND循环分析模型(模型-1)。将该模型及目前已有的推力壁模型(模型-2)分别与基于实验的PDC特性图模型(模型-3)进行对比,计算了模型PDTE的设计点性能,结果表明:模型-1计算得到的PDTE单位推力(FS)及单位燃油消耗率(sfc)的计算误差较模型-2分别减小了1.75%和4.04%,准确性有所提高。与需要大量实验数据的模型-3相比较,模型-1更简便,可用于PDTE性能的快速评估。应用模型-1计算了飞行状态改变时PDTE性能增益的变化趋势。

Abstract:

Calculating performance of PDTE can provide important data for design and further experiment. Based on the theory of ZND detonation wave and cycle analysis,a model (ZND cycle analysis method, model-1) to calculate the performance of PDTE was established.The model and former thrust wall model (model-2) with PDC characteristic chart method (model-3) was compared. And using the three models the design point performance of a PDTE was calculated. The result shows that, compared with model-2 the error of specific thrust (FS) by using model-1 reduces 1.75%. And the error of specific fuel consumption (sfc) reduces 4.04%. Thus model-1 is more precise than model-2. Compared with model-3 which need more experiment data the method-1 is more convenient. This model can be used to fast evaluate the performance of PDTE.The change of performance gain of PDTE was calculated with the change of flight state. 