掺气折流器对侧空腔和底空腔长度的影响  

Effect of lateral deflector on lateral and bottom cavity lengths

作　　者：聂孟喜[1] 吴广镐[1] 王晓明[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《水利学报》2002年第5期91-96,共6页Journal of Hydraulic Engineering

摘　　要：在突扩突跌掺气设施中 ,为保证掺气效果 ,增加底空腔和侧空腔的长度 ,加设折流器是有效的工程措施 .试验证明 ,折流器坡度和高度对空腔长度均有影响 ,较高的折流器增加空腔长度明显 ,且使底空腔与侧空腔贯通 ,有利于底空腔充分掺气 .回溯水流使底空腔变短 ,有效空腔长度是影响掺气效果的重要因素 .在空腔长度的计算中应综合考虑 ,顶板坡角 ,跌坎挑角和折流器体型的影响 ,得出的计算公式有实际应用和理论意义 .The effect of lateral deflector on lateral and bottom cavity lengths is studied experimentally.The result shows that the high deflector may magnificently affect the lengths of cavity and makes the bottom cavity combining with lateral cavities,which is benefit to the entrainment of air.The backward flow in the bottom cavity reduces the cavity length.It is pointed out that the slope of outlet,the angle of bucket and the configuration of lateral deflector must be carefully considered to achieve the best air entrainment effect.A new formula is proposed for calculation of the cavity length.

关 键 词：掺气折流器 侧空腔 底空腔 长度 射流 

分 类 号：TV131.66[水利工程—水力学及河流动力学]