突扩整流孔板设计与多孔孔板尾迹发展的数值模拟  

Design of Multi-hole Orifice for Sudden Expansion Flow and Numerical Simulation on the Development of Wake in Porous Orifice Plate

作　　者：但汉攀 薛临风 丁骏 汪旦军 蓝吉兵 郑健生 DAN Hanpan;XUE Linfeng;DING Jun;WANG Danjun;LAN Jibing;ZHENG Jiansheng(Hangzhou Turbine Power Group Co.,Ltd.,Hangzhou 310022,China;Zhejiang Ranchuang Turbine Machinery Ltd.,Hangzhou 311102,China)

机构地区：[1]杭州汽轮动力集团股份有限公司,杭州310022 [2]浙江燃创透平机械有限公司,杭州311102

出　　处：《动力工程学报》2024年第11期1804-1810,共7页Journal of Chinese Society of Power Engineering

基　　金：中国博士后科学基金资助项目(2020M671672);浙江省科技计划资助项目(2022C01118)。

摘　　要：为了研究压气机试验台进气系统突扩流动孔板的整流效果,设计了4套不同布局的孔板。采用数值模拟方法研究了突扩流动核心区域(简称“中心区域”)开孔率和整个孔板孔分布对多孔孔板尾迹流和主流掺混过程的影响。结果表明:中心区域开孔率增大会使孔板四周区域分流不足,当中心区域开孔率增大到突扩上下游截面面积比的1.46倍时,中心区域分流流量占比达到其面积占比的1.88倍,稳压箱近壁面区域和角区尾迹涡合并增大,长度达到孔间距的17~24倍;为抑制近壁面区域和角区尾迹涡增大和变长,选取中心区域开孔率与突扩上下游截面面积比相当为宜;缩短中心区域孔后尾迹涡长度的最有效方法是缩小孔间距。To investigate the rectification effect of perforated plates in the inlet system of a compressor test rig with sudden expansion flow,four sets of perforated plates were designed.Effects of the porosity in the core region of sudden expansion flow(referred to as central region)and pore distribution on the mixing process between the wake flow of multi-hole orifices and main flow were studied using numerical simulation method.Results show that increasing the porosity of central region leads to insufficient flow distribution at the periphery of plates.When the opening rate of the central region increases to 1.46 times of upstream and downstream cross-sectional area ratio of the sudden expansion,the proportion of flow distribution in the central region reaches 1.88 times of its area ratio.Consequently,the wake vortices near the wall and corner of plenum chamber merge and elongate,whose length reaches 17 to 24 times of the pore spacing.To suppress the increase and elongation of wake vortices near the wall and corner,it is advisable to select the opening ratio in the central area equivalent to the upstream and downstream cross-sectional area ratio of the sudden expansion.Reducing the pore spacing is the most effective method to shorten the length of wake vortices behind the central region.

关 键 词：突扩流动 多孔孔板 整流 尾迹涡 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]