摘要
为分析流速系数和动能系数对挖深式消力池深度及长度的影响,计算了某挖深式消力池工程在不同溢洪道流量、流速系数及动能系数组合条件下的消力池的深度及长度。分析结果表明,计算的消力池深度及长度随流速系数及动能系数的增大而增大。流量和动能系数一定时消力池深度、长度对流速系数变化的敏感性较大,流量和流速系数一定时消力池深度、长度对动能系数变化的敏感性较小,流速系数、动能系数一定时消力池深度随流量的变化趋势为先增大后减小,而消力池长度随流量的增大而增大。建议在进行消力池水力设计时,动能系数α可取中值为1.02~1.03,而流速系数φ的取值则需根据工程具体条件慎重选取。
In order to analyze the influence of kinetic energy coefficient and velocity coefficient on the depth and length of the deepened-stilling basin,this paper took a spillway stilling basin engineering as an example to calculate the depth and length of the stilling basin under the conditions of different combinations of spillway flow discharges,kinetic energy coefficient and velocity coefficient.The results show that the calculated depth and length of the stilling basin increase with the increase of velocity coefficient and kinetic energy coefficient.With the constant flow discharge and kinetic energy coefficient,the velocity coefficient has a greater influence on the calculated depth and length of the stilling basin.Under the conditions of constant flow discharge and velocity coefficient,the kinetic energy coefficient has a little influence on the calculated depth and length of the stilling basin.Furthermore,with the constant velocity coefficient and kinetic energy coefficient,as flow discharge increasing,the calculated depth of the stilling basin increases at the beginning and then decreases,while the calculated length of the stilling basin increases with the flow discharge increasing.It is suggested that the kinetic energy coefficient should be given in the range of 1.02-1.03 for design of stilling basin,and the velocity coefficient should be given based on the project conditions.
作者
杨金孟
韩旭东
孙一清
张靖
徐力群
YANG Jin-meng;HAN Xu-dong;SUN Yi-qing;ZHANG Jing;XU Li-qun(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;Dongying Branch of Shandong Water Diversion Project Operation and Maintenance Center,Dongying 257300,China;College of Water Conservancy and Civil Engineering,Shandong Agricultural University,Taian 271018,China)
出处
《水电能源科学》
北大核心
2021年第8期133-137,共5页
Water Resources and Power
基金
国家自然科学基金/雅砻江联合基金项目(U1765205)
江苏高校优势学科建设工程资助项目(水利工程)(YS11001)。
关键词
流速系数
动能系数
消力池深度
消力池长度
敏感性分析
velocity coefficient
kinetic energy coefficient
depth of stilling basin
length of stilling basin
sensitive analysis
作者简介
杨金孟(1993-),男,博士研究生,研究方向为水利工程控制与优化,E-mail:630955225@qq.com;通讯作者:徐力群(1983-),男,博士、副教授,研究方向为水利工程控制与优化,E-mail:20100051@hhu.edu.cn。
