尾缘凹扇及综合修形对波瓣混合器性能影响  

Effect of elliptical and compositive cut at trailing edge on the performance of a lobed mixer

作　　者：刘友宏[1] 谢翌[1] 郭楠[1] 

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100191

出　　处：《航空动力学报》2010年第2期243-250,共8页Journal of Aerospace Power

基　　金：航空科技创新基金重点项目(07B51002)

摘　　要：建立了某实用的尾缘凹扇和综合修形波瓣混合器流场数值计算模型,通过三维数值模拟研究,得到了尾缘凹扇以及综合修形对波瓣混合器流场、热混合效率和总压恢复系数的影响规律.结果表明:凹扇修形热混合效率随切除大小的增大而减小,总压恢复系数随切除大小的增大而增加;在所研究的尾缘综合修形模型中,凹扇半切模型混合效率高,总压损失小,综合性能最好.The principal effects of different elliptical and compositive cut at trailing edge of a practical lobed mixer on the thermal mixing efficiency and total-pressure recovery coeffi- cient were studied by three dimensional-computational fluid dynamics （3D-CFD） numerical simulation. The results show that the thermal mixing efficiency declines while the total-pres- sure recovery coefficient increases as the cut size of the elliptical sector augments. As for the models of compositive cut at trailing edge, the thermal mixing efficiency is lower than that of the original models except for the model with half sector arrangement, but the total-pressure recovery coefficient is usually higher than that of the original model. Among all the models with compositive modification, the model with half sector arrangement has the best performance.

关 键 词：波瓣混合器 凹扇以及综合修形 流向涡 热混合效率 总压恢复系数 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]