消防流道系统渐扩管水力损失分析与结构优化  

Analysis of hydraulic loss and structure optimization of diverging pipe of fire-fighting runner system

作　　者：胡旭财 胡亚辉[1,2] 宁图增 李俊 HU Xucai;HU Yahui;NING Tuzeng;LI Jun(Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control;National Demonstration Center for Experimental Mechanical and Electrical Engineering Education,Tinjin University of Technology,Tianjin 300384,China;Tianjin Ruikelai Electrical Equipment Manufacturing Co.,Ltd.,Tianjin 300400,China)

机构地区：[1]天津理工大学天津市先进机电系统设计与智能控制重点实验室,天津300384 [2]天津理工大学机电工程国家级实验教学示范中心,天津300384 [3]天津市瑞克来电气设备制造有限公司,天津300400

出　　处：《天津理工大学学报》2022年第4期38-42,共5页Journal of Tianjin University of Technology

基　　金：天津市自然科学基金资助项目(17JCQNJC04700)。

摘　　要：针对消防流道系统渐扩管局部水力损失问题,采用计算流体动力学(computational fluid dynamics,CFD)技术,对渐扩管内部流动进行分析,并与模型试验结果进行比较。基于流体力学理论,对渐扩管局部损失系数进行计算,运用数值模拟方法优化渐扩管结构。结果表明:数值模拟结果与试验结果误差较小。在不同流量下,渐扩管水力损失符合二次抛物线规律。扩张角与管径比对渐扩管水力损失有显著影响,在扩张角为8.6°,管径比为1.4时,水力损失最小。工程应用中应重视渐扩管选型,降低局部水力损失,提高流道效率。Aiming at the local hydraulic loss of the diverging pipe of the fire-fighting runner system,the computational fluid dynamics(CFD)technology is used to analyze the internal flow of the diverging pipe and compare with the model test results.Based on the theory of fluid mechanics,the local loss coefficient of the expander is calculated,and the structure of the expander is optimized by the numerical simulation method.The error between the numerical simulation results and the test results is small.Under different flow rates,the hydraulic loss of the diverging pipe conforms to the quadratic parabola law.The ratio of expansion angle to pipe diameter has a significant effect on the hydraulic loss of the diverging pipe.When the expansion angle is 8.6°and the pipe diameter ratio is 1.4,the hydraulic loss is the smallest.In engineering applications,the attention should be paid to the selection of divergent pipes to reduce local hydraulic losses and improve flow channel efficiency.

关 键 词：渐扩管 水力损失 数值模拟 优化设计 消防流道 

分 类 号：TU892[建筑科学]