水力发电学报2012，Vol.31Issue(1)：140-145,150,7.
空化水流与水流空化数的压强差当量表述
Cavitation flow and the description to pressure equivalent of cavitation numbers
刘继广1
作者信息
- 1. 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038
- 折叠
摘要
Abstract
Relative relationships between pressure equivalent and pressure stress state are compared for three different cavitation numbers by using the concepts of matter state and matter image and taking image as state equivalent in graphical expressions in a 4-axises system.Based on the physical process of water cavitation phenomenon and the physical meaning of cavitation numbers,non-corresponding situations of the quantitative expression of cavitation numbers to the cavitation flow state are analyzed.The analysis results show that the cavitation numbers have some defects in representing cavitation condition or being used as a similitude criterion.This suggests that any mathematical formula description of physical phenomenon should not be beyond its physical boundary,and otherwise its correspondence to the practical engineering problems would become difficult.关键词
水力学/空化水流/压强当量/物理边界/绝对压强Key words
hydraulics/cavitation flow/pressure equivalent/physical boundary/absolute pressure分类
建筑与水利引用本文复制引用
刘继广..空化水流与水流空化数的压强差当量表述[J].水力发电学报,2012,31(1):140-145,150,7.
