摘要
针对某涡轴发动机径向进气装置的进气畸变模拟需求,采用数值模拟的方式研究了径向进气时孔板流动的流场特征和AIP界面总压分布特点,并分析了不同几何参数对径向进气装置流场的影响情况。结果表明:板上无孔时,周向孔板越大造成的总压损失越大,流场畸变更强;孔数不变时,随着堵塞度Pb的减小,总压恢复系数σ和畸变指数会上升;堵塞度Pb不变时,随着孔数的增加,总压恢复系数σ都几乎不受影响,而畸变指数减小。
The radial intake device of a turboshaft engine is selected as research object.The flow field characteristics of orifice plate flow and the total pressure distribution characteristics of AIP interface are studied by numerical simulation,and the influence of different geometric parameters on the flow field of the radial intake device is analyzed.The results show that the flow loss mainly comes from the wake area behind the support plate without the arc plate;the flow around the orifice plate and the interaction between the orifice plate and the support plate promote the separation of the fluid on the support plate surface and increase the loss,while the orifice plate jet restrains the separation of the support plate surface and weakens the loss;smaller plugging rate and fewer holes make the distortion of the AIP interface flow field smaller.
作者
肖竞雄
张品
XIAO Jingxiong;ZHANG Pin(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;The 60th Research Institute of General Staff Dept of P.L.A.,Nanjing 210016,China)
出处
《机械制造与自动化》
2020年第4期57-60,77,共5页
Machine Building & Automation
关键词
径向进气
孔板绕流
数值计算
流动损失
radial intake
orifice flow
numerical calculation
flow loss
