摘要
与燃气轮机常规进气方式相比,舰用燃气轮机舷侧进气系统对风速、风向等环境条件更为敏感,从而影响整体性能表现。为验证某舰用燃气轮机舷侧进气系统在不同进气方向下总体性能是否满足设计要求,本文搭建了该进气系统比例模型,并在其中布置了滤清器、稳压室、消声器等损失部件模型,对舷侧进气系统在5个常见的进气方向下的整体性能表现进行了试验研究,对各个进气方向下7个关键截面上流场进行了详细测量。试验结果发现,进气方向明显影响舷侧进气系统性能,进气方向垂直于百页窗时进气系统总阻力损失最小。进气系统中前端部件,如百叶窗、滤清器、稳压室等部件流动损失受进气系统的影响较为明显,消声器等进气系统尾端部件的流动损失基本不受影响。速度场测量结果表明,进气方向同样会影响进气系统出口截面上流动畸变情况,变化趋势与进气系统总阻力损失变化趋势基本相反。试验结果表明,在不同进气方向下,舷侧进气系统设计方案的总阻力损失、出口截面畸变、主机功率损失均满足设计要求。
Compared to traditional structure,lateral facing air-intake system is much more sensitive to the environmental conditions,such as air-intake velocity or directions,which have significantly impact on overall performance.This paper investigated experimentally the influence of air-intake direction on lateral facing air-intake system in a large marine gas turbine.A scale model of the whole intake system was built,loss parts were also included,such as filter,plenum chamber and silencer.Five different air-intake directions were simulated with corresponding intake guide device.Detailed flow field measurements were made on seven critical planes in all the cases.The results indicate that air-intake direction significantly affects the overall performance of air-intake system.The total pressure loss is minimum when the air-intake direction is vertical to the shutter.Front parts of the system,such as shutter,filter and plenum chamber,are much more influenced by air-intake direction than the back parts.Meanwhile,flow distortion on the outlet plane of the system is also influenced by air-intake direction,but the variation tendency is almost opposite to that of total pressure loss.Based on the experimental results,it can be concluded that all the total pressure loss,the distortion and the engine power loss can meet the design requirement under different air-intake directions.
作者
李庆峰
胡娟娟
牛茂升
隋平阳
Li Qingfeng;Hu Juanjuan;Niu Maosheng;Sui Pingyang(China Ship Development and Design Center,Shanghai 201108,China)
出处
《燃气轮机技术》
2023年第4期20-27,31,共9页
Gas Turbine Technology
关键词
舷侧进气系统
进气方向
试验研究
总压损失
流动畸变
lateral facing air-intake system
air-intake direction
experimental investigation
total pressure losses
flow distortion
