摘要
为探究倒车涡轮叶片在反转条件下的鼓风损失影响因素,本文以某型可倒车涡轮双层涡轮叶片为研究对象,在正车运行工况下,使用有限元仿真计算方法,分析倒车涡轮叶片在反转条件下鼓风损失产生机制,并且在不同转速、不同气体压力、不同气体温度、不同叶片高度、不同挡板参数下,开展了倒车涡轮叶片反转鼓风损失计算,掌握鼓风损失影响因素,提炼了关键参数与鼓风损失的关系式。计算结果表明:倒车涡轮叶片反转产生的鼓风损失随转速的增加而增加、随气体压力的增加而增加、随气体温度的增加而降低、随叶片高度的增加而增加,在叶片附近增加挡板后,鼓风损失明显降低,并且随着叶片与挡板之间距离的减小而降低,随挡板与内通流壁板之间间隙的增加,鼓风损失先减小后增加。结论可用于指导倒车涡轮鼓风损失控制装置的设计。
In order to explore the factors influencing blast loss of reversing turbine blades under reverse conditions,the double-layer turbine blades in a reversing gas turbine were taken as the research object in this study Under the forward working condition,the generation mechanism of blast loss of reversing gas turbine blades in a reverse rotating state was analyzed by using the finite element simulation calculation method.And the reverse blast loss was calculated under different rotating speeds,different air pressure,different air temperature,different blade heights,and different baffle parameters.The influencing factors of blast loss was obtained,and the relational expression between key parameters and blast loss were refined.The calculation results show that the blowing loss generated by reverse rotation of reversing turbine blades increases with the increase of rotating speed,air pressure,blade height,respectively,and decreases with the increase of air temperature.After adding baffles near the blades,the blowing loss is reduced significantly.What’s more,the blowing loss decreases with the increase of the distance between the blade and the baffle.With the increase of the gap between the baffle and the internal flow wall panel,the blast loss first decreases and then increases.The conclusion can be used to guide the design of reverse turbine blast loss control device.
作者
李宗全
牛夕莹
王林
安仲玉
LI Zongquan;NIU Xiying;WANG Lin;AN Zhongyu(No.703 Research Institute of CSSC,Harbin 150078,China;National Engineering Laboratory for Marine and Ocean Engineering Power System,Harbin 150078,China)
出处
《应用科技》
CAS
2024年第1期98-104,129,共8页
Applied Science and Technology
基金
国家科技重大专项(J2019-II-0018-0039)。
关键词
倒车涡轮
双层涡轮叶片
倒车叶片
反向转动
鼓风损失
影响因素
挡板
关系式
reversing turbine
double-layer turbine blades
reversing blade
reverse rotation
blast loss
influencing factor
baffle
relational expression
