引射器出口直径对船用燃气轮机装置的影响  

Influence of Ejector Outlet Diameter upon Marine Gas Turbine Installation

作　　者：胡肖肖[1] 李良才[1] 姚思楠 HU Xiao-xiao;LI Liang-cai;YAO Si-nan(China Ship Development and Design Center,Wuhan 430064,China)

机构地区：[1]中国舰船研究设计中心,武汉430064

出　　处：《船海工程》2022年第S02期43-46,共4页Ship & Ocean Engineering

摘　　要：利用数值仿真模拟和陆上试验验证的方法,研究燃气轮机箱装体温度、冷却空气引射率,以及燃气轮机效率随引射器出口直径的变化规律。对比仿真计算数据和陆上试验数据,发现燃气轮机引射冷却空气系数、箱装体冷却空气出口温度分布趋势基本一致,即随着冷却空气引射器出口直径的降低,燃气轮机的引射系数会逐渐增大,引射的冷却空气量变大,箱装体内温度会降低,但是燃气轮机的效率降低。为解决燃气轮机箱装体温度高的问题,综合考虑冷却空气引射系数和燃气轮机的效率,优选了冷却空气引射器出口直径大小,可以为工程设计提供依据。The methods of numerical simulation and land test verification were used to study the variation rules of the internal temperature of gas turbine unit,the emission rate of cooling air and the efficiency of gas turbine with the outlet diameter of ejector.By comparing the simulation data with the onshore test data,it was found that the coefficient of cooling air and the trend of temperature distribution are basically the same,that is,with the decrease of outlet diameter of ejector,the ejection coefficient of gas turbine will increase gradually,the cooling air volume of the injection will be larger,and the internal temperature of gas turbine unit will be reduced,but they are at the cost of reducing the efficiency of gas turbine.In order to solve the problem of high internal temperature of gas turbine unit,considering the ejection coefficient and the ejection coefficient of gas turbine,the outlet area of cool air ejector was optimized,which can provide basis for engineering design.

关 键 词：船用燃气轮机 引射器出口 箱装体温度 引射率 效率 

分 类 号：U664.131[交通运输工程—船舶及航道工程]