叶顶间隙对船舶余热系统动力涡轮性能的影响
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摘要
近些年来随着国家对节能减排的重视,船舶余热利用系统越来越多地受到关注。动力涡轮是余热利用系统的重要组成部分,其设计效果直接影响余热利用系统的转换效率。采用数值模拟方法研究叶顶间隙对动力涡轮的性能影响,结果表明,叶顶间隙的增加会导致径流式涡轮二次流动损失增加,进而导致涡轮等熵效率下降。
In recent years, with the national attention to energy saving and emission reduction, ship waste heat utilization system has attracted more and more attention. The power turbine is an important part of the waste heat utilization system, and its design effect directly affects the conversion efficiency of the waste heat utilization system. The numerical simulation method is used to study the influence of the tip clearance on the performance of the power turbine. The results show that the increase of the tip clearance will lead to an increase in the secondary flow loss of the radial turbine, which in turn leads to a decrease in the isentropic efficiency of the turbine.
In recent years, with the national attention to energy saving and emission reduction, ship waste heat utilization system has attracted more and more attention. The power turbine is an important part of the waste heat utilization system, and its design effect directly affects the conversion efficiency of the waste heat utilization system. The numerical simulation method is used to study the influence of the tip clearance on the performance of the power turbine. The results show that the increase of the tip clearance will lead to an increase in the secondary flow loss of the radial turbine, which in turn leads to a decrease in the isentropic efficiency of the turbine.
引文
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[2]陈东.基于FLUENT的车用涡轮增压器蜗壳内三维流场分析[D].天津:天津大学,2012.
[3]赵刚.透平转子叶顶流动及换热特性研究[D].上海:上海交通大学,2014.
[4]PAPA M,GOLDSTEIN R J,GORI F.Numerical Heat Transfer Predictions and Mass Heat Transfer Measurements in a Linear Turbine Cascade[J].Applied Thermal Engineering,2007,27(4):771-778.
[5]孙文剑.船舶余热利用动力涡轮设计与发电单元研究[D].哈尔滨:哈尔滨工程大学,2018.
[6]HEYES F J G,HODSON H P.Measurement and Predicttion of Tip Clearance Flow in Linear Turbine Cascades[J].Journal of Turbo Machinery,1993,115(3):376-382.
[7]邓庆锋,郑群,岳国强.某船用汽轮机调节阀箱数值模拟[C]//中国工程热物理会(气动).2009.
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