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波瓣数对波瓣强迫混合排气系统性能影响
引用本文:刘友宏,樊超,谢翌,卲万仁,许羚.波瓣数对波瓣强迫混合排气系统性能影响[J].航空动力学报,2010,25(8):1683-1689.
作者姓名:刘友宏  樊超  谢翌  卲万仁  许羚
作者单位:1. 北京航空航天大学,能源与动力工程学院,北京,100191
2. 北京航空航天大学,能源与动力工程学院,北京,100191;中国航空工业集团公司,沈阳发动机设计研究所,沈阳,110015
3. 中国航空工业集团公司,沈阳发动机设计研究所,沈阳,110015
摘    要:建立了不同波瓣数的某涡扇发动机波瓣混合排气系统的几何模型和数值计算模型,通过三维数值模拟研究,得到了在波瓣强迫混合排气中不同波瓣数对波瓣混合器流场、热混合效率和总压恢复系数的影响规律.结果表明:在波瓣数8~24范围内,在波瓣尾缘处,流向涡无量纲平均涡量随波瓣数的增加而增大;在混合排气系统出口截面处,热混合效率随波瓣数的增加而减小,总压恢复系数随波瓣数的增加先增大后减小再增大.

关 键 词:排气系统  波瓣混合器  波瓣数  热混合效率  总压恢复系数
收稿时间:2009/6/24 0:00:00
修稿时间:2009/10/16 0:00:00

Effect of lobe numbers on the performance of a lobed mixer in the forced mixing exhaust system
LIU You-hong,FAN Chao,XIE Yi,SHAO Wan-ren.Effect of lobe numbers on the performance of a lobed mixer in the forced mixing exhaust system[J].Journal of Aerospace Power,2010,25(8):1683-1689.
Authors:LIU You-hong  FAN Chao  XIE Yi  SHAO Wan-ren
Institution:Beihang University
Abstract:Geometric and numerical simualtion models of a foced lobe mixing exhaust system with different number of lobe were created. Though 3-D numerical simulation the principle of effect of different number of lobe in a forced mixing exhaust system was obtained. The results show that non-dimensional average streamwise vorticities increase at the trailing edge of the lobe mixer as the number of lobe augments. At the exit section of the force mixing exhaust system, thermal mixing efficiency rises as the lobe number increases, and the total-pressure recovery factor at first increases when the lobe number increases form 8 to 16, then declines when it augments form 16 to 20 and finally again increases when it rises from 20 to 24.
Keywords:exhaust system  lobed mixer  lobe numbers  thermal mixing efficiency  total-pressure recovery coefficient
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