摘要
为降低叶轮所受动静干涉,提高叶轮的安全性,本文以某带有进口可调导叶的离心压缩机为例,采用数值方法,在导叶中设置吹气槽道,补偿导叶所产生的尾迹影响,针对导叶不同开度以及不同吹气量,分析吹气结构后的叶轮流场及其气动载荷。结果表明:在0°开度下导叶尾缘吹气为2%压缩机总流量时,呈现出无动量亏损型尾迹,叶轮气动载荷降低显著,同时对压缩机外特性影响较低;随着导叶开度增加,导叶壁面分离加大,尾缘吹气效果反而降低。
In order to compensate the wake effect casing by guide vane,the air injection through two channels is applied to the trailing edge. The trailing edge blowing reduces the impact of rotor-stator interaction and further decreases the aerodynamic load on the following impeller. Thus,it improves the safty of the impeller. Based on numerical simulations,this article studies on the effect of the trailing edge blowing structure in a centrifugal compressor with variable inlet guide vane. The study analyzes the flow field and aerodynamic load under different guide vane angle during the centrifugal compressor operation. The simulation results show that the trailing edge blowing has a little influence on compressor performance. Under different blowing flows,the flow field shows different wake styles,which include pure wake,weak wake,momentumless wake and jet. When the blowing set 2% of the total flow under 0 degree guide vane angle,the momentumless wake appears,and the aerodynamic load on impellers has been reduced significantly,especially at the middle span of the impellers. With the increasing of the guide vane angle,the wake distribution after the guide vane appears significant difference as the development of wall separation flow. It needs more blowing flow to reach the momentumless wake style,however,the effect has decreased. When the guide vane angle is large than 50 degrees above,the influence of wakes can be ignored.
作者
辛建池
王晓放
陈旭东
石海
周路圣
杨树华
XIN Jianchi;WANG Xiaofang;CHEN Xudong;SHI Hai;ZHOU Lusheng;YANG Shuhua(School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024,China;Key Laboratory of Ocean Energy Utilization and Energy Conservation, Dalian University of Technology, Dalian 116024, China;Shenyang Blower Works Group Corporation, Shenyang 110000,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2018年第6期1006-1011,共6页
Journal of Harbin Engineering University
基金
国家重点研究发展计划项目(2016YFB0600104)
辽宁重大装备制造协同创新中心项目
辽宁省科学技术计划重大项目(2015106016)
关键词
离心压缩机
可调导叶
尾缘吹气
气动载荷
数值模拟
运行工况
无动量亏损尾迹
centrifugal compressor
variable inlet guide vane
trailing edge blowing
aerodynamic load
numerical simulation
operation condition
momentumless wake
