摘要
《工程流体力学》本科生教材的基本理论和工程应用都是针对圆形管道适用的,而对于非圆形管道的计算,教科书中提到采用当量直径的方法,认为非圆形管道的阻力和当量直径相同的圆形管道近似,从而将非圆形管道按照圆形管道进行计算。但当量直径相同的圆管和非圆形管的阻力受不同条件影响差别较大,所以本文采用数值计算方法分析影响矩形截面管道比摩阻的要素,为异型管阻力计算提供依据。
The basic theory and engineering application of the undergraduate textbook of Engineering Fluid Mechanics are applicable to circular pipelines,while for the calculation of non-circular pipelines,the equivalent diameter method is mentioned in the textbook,which considers that the resistance of non-circular pipelines is similar to that of circular pipelines with the same equivalent diameter,so that non-circular pipelines are calculated according to circular pipelines.But the resistances of circular pipelines with the same equivalent diameter and non-circular pipelines behave very differently under different conditions.Therefore,this paper uses numerical calculation method to analyze the factors affecting the specific friction of rectangular section pipelines,and provides a basis for the resistance calculation of special-shaped pipelines.
作者
刘丽丽
陶聪颖
王庆
杨含笑
杨晶
范家伟
LIU Lili;TAO Congying;WANG Qing;YANG Hanxiao;YANG Jing;FAN Jiawei(Petroleum Engineering Institute,Northeast Petroleum University,Daqing 163318,Heilongjiang,China)
出处
《力学与实践》
2025年第1期238-241,共4页
Mechanics in Engineering
基金
黑龙江省2021年高等教育教学改革项目(SJGY20210125)资助。
关键词
矩形截面
比摩阻
当量直径
rectangular section
specific friction
equivalent diameter
