水力发电学报2024，Vol.43Issue(4)：50-61,12.DOI:10.11660/slfdxb.20240405
侧式进/出水口水头损失系数多元线性回归分析
Multiple linear regression analysis on head loss coefficients of side inlets and outlets
摘要
Abstract
Flows past the inlets and outlets cause a significant part of the total head loss in the water transmission system of a pumped storage power plant,and its accurate calculation is needed in evaluation of the plant's economic benefit.This paper uses numerical simulations to study the head loss coefficients of 14 types of side inlets and outlets.Using the multiple linear regression method,we formulate regression equations that can calculate the head loss coefficient,and examine its variations with the shape parameters of the inlets and outlets.The results show that the influence of these parameters on the loss coefficients is significant in the outflow condition while insignificant in the inflow condition.Under the outflow condition,a positive correlation occurs between the loss coefficient and the parameters-the length of the diffusion section,the distance between the middle pier retraction of the diffusion section,the horizontal diffusion angle,the vertical diffusion angle,and the ratio of the width of the side hole in the pier head of the diversion section,and the slope ratio of the reverse slope section-while a negative correlation occurs between the loss coefficient and the length of the adjustment section or the length of the anti-vortex beam section.The head loss coefficients calculated using the regression equations agree well with the calculations from numerical simulations.Application of our regression equations is a new way to calculate the head loss coefficients of side inlets and outlets.关键词
侧式进/出水口/水头损失系数/体型参数/数值模拟/回归方程Key words
side inlet and outlet/head loss coefficient/structural parameters/numerical simulation/regression equation分类
水利科学引用本文复制引用
高学平,陶文杰,朱洪涛,刘殷竹..侧式进/出水口水头损失系数多元线性回归分析[J].水力发电学报,2024,43(4):50-61,12.基金项目
国家自然科学基金(52179077) （52179077）
