摘要
跨音速离心式透平是一种单级焓降大、占用空间小、结构简单、气动效率较高的新型透平,适合用于中小型工业透平或余能利用场所。以过热蒸汽为工质,借鉴常规透平的气动设计方法,并针对某小型轴流式蒸汽透平的进出口热力参数,进行跨音速离心式透平级的一维气动设计、三维数值模拟与优化以及变工况性能研究。数值模拟结果与一维气动设计基本一致,叶栅流道内流场合理、流线顺畅、效率较高,气动性能符合预期,说明离心式透平一维气动设计程序具有可靠性和有效性;最后,通过改变转速和背压,对离心式透平进行变工况分析,结果表明,在给定的变工况范围内,跨音速离心式透平具有较好的变工况性能。
The transonic centrifugal turbine which shows high single-stage enthalpy drop,small space occupation,simple structure and high aerodynamic efficiency is suitable for small-to-medium scale industrial steam turbine and waste energy utilization.In this paper,the superheated steam was used as the working substance by adopting aerodynamic design method of conventional turbine.Based on the inlet and outlet thermodynamic parameters of a small-sized axial flow steam turbine,the study of one-dimensional aerodynamic design,three-dimensional numerical simulation and optimization,and performance analysis under off-design condition were carried out.Simulation results based on k-εturbulence model are basically in agree with the one-dimensional aerodynamic design value.There shows reasonable flow field and smooth streamlines in the cascade passage with high efficiency and relatively good aerodynamic performance.In this way,the reliability and validity of one-dimensional aerodynamic design procedure of centrifugal turbine is demonstrated.Finally,the centrifugal turbine is analyzed with various rotational speeds and backpressures under different off-design conditions.The simulation results demonstrate that the transonic centrifugal turbine has a good off-design performance under the given off-design conditions.
作者
司马浩
李会
王莹
黄典贵
SIMA Hao;LI Hui;WANG Ying;HUANG Diangui(Shanghai Key laboratory of Multiphase Flow and Heat Transfer of Power Engineering(University of Shanghai for Science and Technology),Yangpu District,Shanghai 200093,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2020年第5期1569-1579,共11页
Proceedings of the CSEE
基金
国家自然科学基金项目(51536006)
上海市科委科研计划项目(17060502300).
关键词
跨音速
离心式透平
数值模拟
变工况性能
transonic
centrifugal steam turbine
numerical simulation
off-design performance
作者简介
司马浩(1994),男,硕士研究生。主要研究方向为流体机械,动力机械,18917219121@163.com;通信作者:黄典贵(1963),男,上海理工大学教授,主要研究方向为动力机械及工程、流体机械及工程,汽轮机、燃气轮机内部流动与仿真,流动控制,风力机及流场,dghuang@usst.edu.cn。
