摘要
基于假设土体饱和、均质和满足颗粒固定床达西定律的前提下,结合孔口出流模型,推导漏损口漏失流体流量计算模型,揭示了供水地下管道漏损口漏失量与周围土体空隙率和粒径以及管内流体压力之间的变化关系。数值模拟地下管道漏损圆孔流体渗透过程,获得了漏损圆孔漏失流体流量与流体压力的变化规律,预测地下管道漏损圆孔的压力降与文献的实验测量流体压力降相吻合。同时数值模拟得到的地下供水管道流体压力与漏损孔漏失流体流量计算模型预测值具有相同的变化趋势。
A water leakage discharge model is proposed in order to understand the relation between the leakage flow rate and fluid pressure in the buried water supply pipe.Considering the effect of homogeneous and saturated soil on fluid diffusion,the leakage flux rate is correlated with circular orifice when the leakage fluid diffuses into the soil in the radial direction according to the Darcy law.The effect of soil particle size and volume fraction on leakage flux rate is analyzed.Numerical simulations of leakage hydrodynamics are performed according to porous medium method in the buried pipe,and verified from experimental measurements from literature.Simulated fluid pressure drops are in agreement with measured data with the change of leaking hole sizes.The simulated fluid pressures trend to calculations using leakage discharge model at two different leaking hole diameters along axial direction.
作者
李响
姜秀光
邹亚男
汪瞳
夏谢天
陈星
徐增辉
LI Xiang;JIANG Xiuguang;ZOU Yanan;WANG Tong;XIA Xietian;CHEN Xing;XU Zenghui(China Construction Eco-environmental Protection Technology Co.,Ltd.,Suzhou Jiangsu 215124,China)
出处
《工业安全与环保》
2024年第12期26-32,共7页
Industrial Safety and Environmental Protection
基金
中建二局科技资助计划(2021ZX180001)。
关键词
地下供水管道
渗漏
土体空隙率
漏损孔漏失流率
漏失流体压力
buried water supply pipe
leakage
soil volume fraction
flux of leaking hole
pressure loss of leaking fluid
