排汽缸内置挡板对扩压管出口下游漩涡的影响  

Influence on Fluid Vortex Below Outlet of Diffuser by Deflectors in Exhaust Hood

作　　者：魏春枝 杨新健[2] 陈顺宝[2] 

机构地区：[1]国网冀北电力有限公司技能培训中心,保定071000 [2]华北电力大学电站设备状态检测与控制教育部重点实验室,保定071003

出　　处：《汽轮机技术》2014年第3期203-205,共3页Turbine Technology

摘　　要：汽轮机排汽缸内扩压管排出的汽流翻转越过扩压管的内壁进入排汽缸,在上半部排汽缸内形成一个强度较大的漩涡,造成较大的排汽压损。运用Fluent模拟分析排汽缸内流场,结果表明,在上半部排汽缸内装设一列挡板,能有效地减小漩涡的强度,汽缸内流场得到改善,排汽压损减小35Pa。Flow from the diffuser turns over across the inner wall of diffuser and then into the exhaust hood,forming a heavy fluid vortex below the outlet of diffuser,causing exhaust loss. By the simulation analysis of the fluid field in the exhaust hood with application of Fluent programme,it is figured out that a series of deflectors equipped in the upper half hood can decrease the intensity of the vortex,so that the flow field in the exhaust hood is improved and the exhaust pressure loss decreased by 35 Pa.

关 键 词：排汽缸 扩压管 挡板 排汽损失 漩涡 

分 类 号：TK113[动力工程及工程热物理—热能工程]