一种波瓣混合器超级燃烧室的掺混特性  

Mixing characteristics of hyperburner with a lobed mixer

作　　者：程晓军[1] 范育新[1] 蔡迪[1] 王家骅[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《航空动力学报》2014年第7期1606-1614,共9页Journal of Aerospace Power

基　　金：江苏省普通高校研究生科研创新计划(CXZZ12_0167)

摘　　要：为了使涡轮基组合循环发动机超级燃烧室的涡扇涵道和冲压涵道两股气流具有高效低阻的掺混特性,设计了一种结构简单的方形波瓣混合器.用数值模拟方法对该方形波瓣混合器与常规混合器进行了比较分析,结果表明方形波瓣混合器具有与菊花型波瓣混合器相似的流向涡高效低阻掺混特性.进行混合器结构参数变化对掺混特性的影响研究发现扩张角对方形波瓣混合器的热混合效率的影响起主要作用,而出口高度的影响不大;当方形波瓣混合器的波长比为1.0时,方形波瓣混合器具有高效低阻的掺混特性.A simple structure square lobed mixer with high mixing efficiency and low resistance was designed to turbofan by pass flow with ram bypass flow thoroughly in turbine based combined cycle engine hyperburner.Numerical simulation of square lobed mixer and comparative analysis with conventional mixer were made;the results indicate that square lobed mixer with high mixing efficiency and low resistance of the streamwise vortices of daisy lobed mixer.Numerical simulation results of various mixer structure parameters＇influence on mixing characteristics show that expansion angle dominates the thermal mixing efficiency,and the export height of the mixer has little effect on it.The square lobed mixer has the characteristics of high mixing efficiency and low resistance when the wavelength ratio is 1.0.

关 键 词：涡扇冲压组合发动机 超级燃烧室 波瓣混合器 流向涡 热混合效率 总压恢复系数 

分 类 号：V236[航空宇航科学与技术—航空宇航推进理论与工程]