摘要
在湿空气平面叶栅缝隙抽吸试验装置上,对汽轮机空心静叶抽吸缝隙的去水性能进行了试验研究。试验条件为:叶栅进口空气湿度为7.94%,水滴直径在1.5～150μm之间,叶栅出口气流速度为170m/s,缝隙宽度为1.0mm,缝隙角度为45°,缝隙位置分别位于静叶的内弧和背弧。试验结果表明:随着缝隙相对位置的增大,缝隙抽吸水量增大;在相同的抽吸压差下,静叶内弧上单位长度缝隙的抽吸水量大于背弧缝隙的抽吸水量;靠近静叶内弧出口边的抽吸缝隙的去水性能最好;另外,随着抽吸压差的增大,缝隙抽吸水量也增大。
On the slot suction test rig of a humid-air plane-cascade,an experimental study was conducted of the water removal performance of the suction slots on hollow stationary blades of a steam turbine.The test conditions are given as follows:the air humidity at the cascade inlet,7.94%;water droplet diameter,between 1.5 to 150 μm,airflow velocity at the cascade outlet,170 m/s;width of the suction slot,1.0 mm,angle of the suction slot 45°with the suction slots being located at the suction and pressure side of the stationary blades respectively.The test results show that with an increase in relative location of the suction slots,the water quantity sucked through the slots will increase and under a same suction pressure difference,the water quantity sucked through a unit length of a slot on the concave surface of a stationary blade is greater than that on the convex surface.The suction slots close to the water outlet on the concave side of a stationary blade enjoy an optimum water-removal performance.Furthermore,with an increase of the suction pressure difference,the water quantity sucked through the slots will also increase accordingly.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
2007年第5期480-483,共4页
Journal of Engineering for Thermal Energy and Power
基金
国家自然科学重点基金资助项目(50336050)
国家自然科学专项基金资助项目(50323001)
关键词
汽轮机
空心静叶
缝隙位置
抽吸压差
抽吸水量
steam turbine blade,hollow stationary blade,suction slot location,suction pressure difference,water quantity sucked
