掺气分流墩墩头的动水压强特性研究  

Study on characteristics of hydrodynamic pressure on front of aeration-baffles

作　　者：张宗孝[1] 魏文礼[1] 阎晋垣[1] 

机构地区：[1]西安理工大学水利水电学院,西安710048

出　　处：《武汉大学学报（工学版）》2001年第4期1-5,34,共6页Engineering Journal of Wuhan University

基　　金：水利水电科学基金项目资助

摘　　要：对掺气分流墩墩头的动水压强特性进行了试验研究 ,以求了解墩头的抗空蚀性能及动水压强特性 .试验结果得出 :时均压强P/Pmax沿墩高和时均压强系数Cp 沿横断面的分布规律 ;墩头轴线与来流有夹角时Cp 沿横断面的分布规律 ;墩头壁压脉动压强特性以及探讨了柘林掺气分流墩 (墩头的θ =75°)的安全使用范围 ;在墩后充分供气时 ,墩头的空化特性 .Experimental researches of characteristics of hydrodynamic pressure on the front of aeration_baffle have been done so as to obtain the properties of the aeration-baffle resistant to cavitation. The experimental results show the law of distribution of time average pressure P/P max in the vertical direction and of time average pressure coefficient C p on the cross section of aeration-baffles, and the law of distribution of C p on the cross section when the flowing direction is not parallel to the axis of the aeration-baffle, and the characteristics of fluctuating pressure on the front surface of the aeration-baffle, and the safety employed condition of Zhelin Aeration-baffle; and the characteristics of cavitation of the front of the aeration-baffle when air is completely aerated from the back of the aeration-baffle.

关 键 词：掺气分流墩 墩头 脉动压强 时均压强 空化 

分 类 号：TV131.33[水利工程—水力学及河流动力学]