摘要
把Pearsall提出的可变波速公式引入特征线法中,对二相流的水击波速在发生水击时的变化情况进行了计算分析,研究水中含有气泡的管路在水击时管道初始水头及管道特性等敏感因素对水击波速变化的影响,指出上游水头降低、相对管壁厚增加、管材弹性模量增加都会引起水击波速变化的加剧.
In this paper Pearsall's alterable wave speed formula has been brought into the characteristics line method. The variety of the water hammer wave speed of the two-phase flow has been calculated and analyzed. Then the Influence of hypersensitive factors, such as head pressure,pipe characteristics, to the change of the water hammer wave speed in the two-phase flow is analyzed. By analysis we can draw a conclusion that the decline of head pressure, the increase of the relative thickness of pipe and Young's modulus of material all can increase the variety of the water hammer wave speed.
出处
《水利水电技术》
CSCD
北大核心
2004年第11期84-86,共3页
Water Resources and Hydropower Engineering
关键词
水击
非恒定流
水击波速
特征线法
water hammer
unsteady flow
water hammer wave speed
characteristics line method
