水利水电科技进展2025，Vol.45Issue(3)：1-7,7.DOI:10.3880/j.issn.1006-7647.2025.03.001
平面扩散角对侧式进/出水口水力特性的影响
Influence of planar diffusion angle on hydraulic characteristics of lateral inlet/outlet
摘要
Abstract
To investigate the optimal range of the planar diffusion angle,this study employed a numerical simulation method to analyze the hydraulic characteristics of a lateral inlet/outlet in a pumped storage power station under different planar diffusion angles.The influence of the planar diffusion angle on the velocity distribution at the trash rack section,orifice flow distribution,and head loss of the inlet/outlet was analyzed.The results demonstrated that when the planar diffusion angle increased from 25° to 45°,the non-uniformity coefficient of the velocity at the trash rack section decreased gradually under the outflow condition,while the non-uniformity of the orifice flow distribution and head loss of the inlet/outlet increased gradually.The velocity distribution at the trash rack section,orifice flow distribution,and head loss of the inlet/outlet remained unchanged under the inflow condition.Considering the hydraulic indices of the inlet/outlet comprehensively,it is concluded that the optimal range for the planar diffusion angle is 30° to 40° when the average velocity at the trash rack section meets the design requirement.This range provides higher precision than the current specification and aligns with the diffusion angle range associated with minimal resistance coefficients in rectangular expanding conduits.关键词
抽水蓄能电站/侧式进/出水口/平面扩散角/拦污栅断面流速/数值模拟Key words
pumped storage power station/lateral inlet/outlet/planar diffusion angle/flow velocity at trash rack section/numerical simulation分类
水利科学引用本文复制引用
高学平,罗畅,刘殷竹,朱洪涛..平面扩散角对侧式进/出水口水力特性的影响[J].水利水电科技进展,2025,45(3):1-7,7.基金项目
国家自然科学基金项目(52179077) （52179077）
