湍流参数对含管式减涡器盘腔流动特性影响  

Influence of turbulence parameters on flow characteristics of cavity with tubed vortex reducer

作　　者：白阳 罗翔[1,2] 何建 BAI Yang;LUO Xiang;HE Jian(Research Institute of Aero-Engine,Beihang University,Beijing 102206,China;National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics,School of Energy and Power Engineering,Beihang University,Beijing 102206,China)

机构地区：[1]北京航空航天大学航空发动机研究院,北京102206 [2]北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室,北京102206

出　　处：《航空动力学报》2022年第6期1295-1305,共11页Journal of Aerospace Power

基　　金：国家重大专项(2017-Ⅲ-0011-0037)。

摘　　要：通过计算卷吸流量对传统湍流参数定义进行修正,并验证了修正后的湍流参数对气流流动的控制情况。结果表明:修正后的湍流参数在不同的管氏减涡器进出口位置和入口预旋下均对盘腔内的气流流场和总压系数取得了很好的控制效果。气流总压系数和实际旋流系数均同时受修正湍流参数和入口旋流系数控制。此外,随同转速下的湍流参数增加,气流保持其径向内流状态的能力增强,需要管氏减涡器抑制其周向旋转的区域减少,使得总压系数最小的最优管氏减涡器长度减短。This parameter was modified by calculating the entrainment flow rate. The result showed that the modified turbulence parameter had great control effect on flow state and total pressure coefficient. Both the total pressure coefficient and the effective swirl fraction relied on the modified turbulence parameter and the inlet pre-swirl fraction. In addition, the ability of air to maintain radial internal flow state was enhanced with the increase of modified turbulence parameter. Therefore, the area requiring suppress circumferential rotation decreased, which shortened the optimal length of the tubed vortex reducer with the minimum total pressure coefficient.

关 键 词：管式减涡器 湍流参数 流场结构 总压系数 入口预旋 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]