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掺气坎(槽)射流空腔长度的计算
引用本文:徐一民,王韦,许唯临,刘善均. 掺气坎(槽)射流空腔长度的计算[J]. 水利水电技术, 2004, 35(10): 7-9
作者姓名:徐一民  王韦  许唯临  刘善均
作者单位:四川大学,高速水力学国家重点实验室,四川,成都,610065;昆明理工大学,电力工程学院,云南,昆明,650051;四川大学,高速水力学国家重点实验室,四川,成都,610065
基金项目:国家杰出青年基金项目(50325928),国家自然科学基金项目(50279022),教育部博士点基金项目(20020160017).
摘    要:从分析掺气坎(槽)射流微分水体受力的力学关系出发,考虑了空腔内负压及运动液体所受离心惯性力的影响,建立起射流水舌下缘液体质点运动轨迹的微分方程.提出一种通过物理力学概念求解射流空腔长度的计算方法,并分析了空腔内负压、挑角等水力参数对射流空腔长度的影响.计算结果与试验值吻合良好。

关 键 词:掺气坎  空腔长度  空腔负压  离心惯性力
文章编号:1000-0860(2004)10-0007-03
修稿时间:2004-06-29

Calculation of the cavity length of jet flow from chute aerators
XU Yi-min. Calculation of the cavity length of jet flow from chute aerators[J]. Water Resources and Hydropower Engineering, 2004, 35(10): 7-9
Authors:XU Yi-min
Abstract:Based on the hydrodynamic analysis of micro water unit of jet flow from aerator, a differential equation for trajectory of jet flow has been established, in which the negative pressure in the bottom cavity of jet and centrifugal force of flow are considered. A new calculating method for bottom cavity length of jet flow from chute aerators is obtained. Finally, the way how the negative pressure in the bottom cavity of jet effects the length of jet is discussed. Comparison shows that the calculation results agree well with the observed experimental data.
Keywords:aerator  length of jet flow  negative pressure  centrifugal force
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