摘要
摩阻损失的精确计算对于长输管道的水力瞬变分析是很重要的一个环节,过去为减少计算工作量,采用固定摩阻系数和流量一阶近似法计算瞬变流摩阻,精度有限.本文跟踪液流流态变化,采用变摩阻系数和流量二阶插值法计算瞬变流摩阻,提高了摩阻计算精度.同时,从理论上分析了管道摩阻对水力瞬变的影响,澄清了一些模糊认识.
In the analysis of transient in long pipeline, it is very important to compute the hydraulic friction as accurate as possible. In the past, in order to reduce the operations, the fixed viscous friction coefficient and first-order approximation were used to compute the friction term in the basic equations of transient flow. But this treatment is inadequate. In this paper, the treatment of the friction term by using friction coefficient varying with flow conditions and a second-order integration is more accurate. At the same time, on the basis of the theoretical analysis, the influence of hydraulic friction to transient flow was studied.
出处
《力学与实践》
CSCD
北大核心
2003年第1期13-15,共3页
Mechanics in Engineering
