ORC向心透平静叶栅内二次流结构和损失分析  

Analysis on Structure and Loss of Secondary Flow in Stator Cascades of an ORC Radial Inflow Turbine

作　　者：王智[1] 尹立冰 刘艺苗 焦庆雅 屈海涛 WANG Zhi YIN Libing LIU Yimiao JIAO Qingya QU Haitao(MOE＇s Key Lab of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Baoding 071003, Hebei Province, China)

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定071003

出　　处：《动力工程学报》2017年第10期801-807,共7页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(51306059);华北电力大学中央高校基本业务费专项资金资助项目(2014ZD34);国家科技支撑计划资助项目(2014BAA06B01)

摘　　要：为了改进有机工质朗肯循环(ORC)向心透平静叶栅的气动性能,对ORC向心透平内有机工质流动进行三维黏性数值模拟,分析静叶栅上下端壁和通道内各种涡系的表现形式,给出了沿轴向和径向方向的总压力损失系数分布.结果表明:静叶栅内存在压力面与吸力面之间的横向流动,但通道涡并没有形成,通道涡并不是ORC向心透平静叶栅内二次流涡流形式中的重要涡系结构;主要总压损失沿流向方向集中在静叶栅后0.4流向位置,沿叶高方向集中在上下端壁,沿周向方向则聚集在吸力面附近.To improve the aerodynamic performance of stator cascades in radial inflow turbines,three-dimensional viscous numerical simulation was carried out for the flow of organic working fluid in a radial inflow turbine.The forms of various vortices on lower and upper end walls and in the stator cascade passage were analyzed in detail.Meanwhile the distribution of total pressure loss coefficient along the axial and radial directions was presented.Results show that there exists a horizontal flow between the pressure surface and suction surface,but no passage vortex is formed,which is not an important vortex structure for secondary flow in stator cascades of ORC radial inflow turbines.The total pressure loss mainly appears in later 0.4 cascade passage in axial chord direction,near lower and upper end walls in blade height direction,close to the suction surface in circumferential direction.

关 键 词：向心透平 静叶栅 二次流损失 涡系结构 有机工质 数值模拟 

分 类 号：TK14[动力工程及工程热物理—热能工程]