三角形网格CE/SE方法在带锥形尾喷管两相脉冲爆轰发动机流场计算中的应用  

Application of CE/SE method using triangular meshes on calculation two-phase pulse detonation engine with nozzle

作　　者：王研艳[1] 翁春生[1] 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,江苏南京210094

出　　处：《空气动力学学报》2013年第5期662-669,共8页Acta Aerodynamica Sinica

基　　金：高等学校博士学科点专项科研基金(20093219110037);国家部委基金(KX21358)

摘　　要：推导了带源项的三角形网格求解元守恒元数值方法的计算格式,应用该方法模拟了带锥形扩张尾喷管的气液两相脉冲爆轰发动机的内外流场。分析了锥形尾喷管内不同填充状况对脉冲爆轰发动机的内外流场和推进性能的影响。计算结果表明该三角形网格CE/SE方法可以有效捕捉到直管和变截面管中的爆轰波、激波等强间断,很好地刻画了PDE内外流场的细节。锥形尾喷管中不填充燃料时,尾喷管中的流场复杂,压力峰值大幅下降,马赫数峰值增大,此时发动机对燃料的利用率更高;而将锥形尾喷管和爆轰管作为整体全部填充燃料时,锥形管中流场简单,压力峰值比直管中略有下降,此时发动机得到更大的瞬时推力和冲量,总体推进性能提高。To analyze the detonation characteristics and propulsive performance of pulse detonation engine （PDE） with conical divergent nozzle under different filling conditions, the CE/SE method using triangular meshes, which are suitable to the conical tube, has been proposed and applied to calculate the internal and external flow field of gas-droplets two-phase pulse detonation engine. The results show that the strong gradi- ent such as detonation shock and complicated wave interaction patterns in the straight tube and conical tube can both be perfectly described by using this CE/SE method. When the conical divergent nozzle is not filled with fuel, the PDE achieves a higher fuel specific impulse, with more complex flow field, much lower pres- sure peak and bigger Mach peak appearing in the nozzle than that in the detonation tube. In contrast, simpler flow field and smaller pressure peak difference have been gained in the divergent nozzle of PDE when the noz- zle is full filled with fuel. However, larger total thrust and bigger impulse of PDE are produced under this condition.

关 键 词：CE SE方法 三角形网格 两相爆轰 燃料填充率 锥形尾喷管 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]