矩形孔口射流条件下承泄水体紊动规律研究  

Study on turbulence patterns in receiving water under rectangular orifice jet conditions

作　　者：郭维东[1] 张潇文 王冰欣 GUO Weidong;ZHANG Xiaowen;WANG Bingxin(College of Water Conservancy,Shenyang Agricultural University,Shenyang 110866,China)

机构地区：[1]沈阳农业大学水利学院,辽宁沈阳110866

出　　处：《中国水利水电科学研究院学报(中英文)》2025年第1期19-30,共12页Journal of China Institute of Water Resources and Hydropower Research

基　　金：国家自然科学基金项目(41602247)。

摘　　要：为探究矩形孔口射流条件下承泄水体的紊动规律,本研究使用高速摄像机对水体入水形态进行拍摄,并对承泄水体掺气及水体表面紊动参数进行分析。试验结果表明:水流入水形式主要分为密实水柱入水和破碎水滴入水两种,以连续的密实水柱形式进入承泄水体时,掺气较少;以破碎水滴形式进入承泄水体时,掺气形式多样,掺气量相对较多。对于承泄水体表面的形态特性,随着毛细数C a的增大,相对铺展长度L d逐渐增大,相对喷溅强度B逐渐减小;对于承泄水体,相对掺气体积V随水流下落高度、流量和出射角度的增加而增大,但各角度之间的增长幅度减小。To investigate the turbulent patterns of the submerged body under rectangular orifice discharge conditions,this study used a high-speed camera to capture the water entry patterns,and analyzed the aeration and surface turbulence parameters of the submerged body.The results show that the water entry form mainly consists of compact water column entry and broken water droplet entry,and the aeration is less when the water enters the submerged body in the form of compact water column.When the water enters the submerged body in the form of broken water droplets,the aeration form is diverse and the aeration volume is relatively larger.For the surface morphological characteristics of the submerged body,as the capillary number C a increases,the relative spreading length L d increases and the relative splash intensity B decreases.For the submerged body,the relative aeration volume V increases with the increase of water flow falling height,flow rate and outlet angle,but the growth rate of each angle decreases.

关 键 词：射流 水体紊动 毛细数 相对铺展长度 相对喷溅强度 相对掺气体积 

分 类 号：TV13[水利工程—水力学及河流动力学] O35[理学—流体力学]