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.
作者
白阳
罗翔
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)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
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)。
关键词
管式减涡器
湍流参数
流场结构
总压系数
入口预旋
tubed vortex reducer
turbulence parameter
flow state
total pressure coefficient
inlet pre swirl
