前缘开槽对可调导叶气动性能的影响
Effect of leading edge slotting on aerodynamic performance of variable inlet guide vanes
辛建池 1刘向阳 2田志涛 1吴化银 1陆华伟1
作者信息
- 1. 大连海事大学 船舶与海洋工程学院,辽宁 大连 116000
- 2. 大连海事大学 船舶与海洋工程学院,辽宁 大连 116000;南京航空航天大学 能源动力学院,江苏 南京 210016
- 折叠
摘要
为减少大攻角时可调导叶产生的流动损失,本文基于平面叶栅试验和数值模拟方法,在前缘设置不同槽道结构,将叶片压力面的流体引导至吸力面,吹走低能流体,降低总压损失.研究结果表明:设置槽道引导气流产生射流动量至吸力面侧分离区域能够一定程度上降低不同开度下导叶的出口总压损失.在进口速度为 45 m/s、攻角为 25°时,射流能够有效削弱吸力面的分离涡,可降低 65%的出口总压损失和 2.4°气流落后角,当来流速度达到98m/s时出口总压损失最大可降低 70%.对比不同的槽道形式的射流动量、角度对流场的影响,发现合理的槽道形式可以降低大攻角时的损失基础上,控制小攻角时射流对流场的负面影响.
Abstract
To reduce the flow loss associated with variable inlet guide vanes(VIGVs),this study employs both experi-mental and numerical simulation methods to investigate the impact of introducing differently structured slots at the vane's leading edge.These slots are designed to guide fluid from the vane pressure side to the suction surface,effectively blo-wing away the low-energy fluid and thereby reducing the total pressure loss.Our results show that appropriately placed slots can reduce the total pressure loss at the outlet by guiding airflow and generating jet momentum to the separation are-a near the suction surface.When the inlet velocity is 45 m/s,and the incidence angle is 25°,the jet flow can effectively weaken the separation vortex on the suction surface and reduce the total pressure loss and deviation angle by up to 65%and 2.4°,respectively.Furthermore,when the incoming flow velocity reaches 98 m/s,the outlet's total pressure loss can decrease by up to 70%.By comparing the influence of jet momentum and the angle of different slot forms on the flow field,we discovered that a suitable slot design can reasonably control the negative influence of jet momentum on the flow field at smaller incidence angles while reducing loss at larger incidence angles.
关键词
可调导叶/开槽/气动性能/离心压气机/预旋角度/总压损失/平面叶栅/气流角Key words
variable inlet guide vanes(VIGV)/slotting/aerodynamic performance/centrifugal compressor/pres-wirl angle/total pressure loss/cascade/flow angle引用本文复制引用
基金项目
国家自然科学基金面上项目(5217060574)
辽宁省教育厅基本科研项目(LJKMZ20220364)
出版年
2024
国家科技期刊平台
NSTL
万方数据