摘要
流体管道小孔泄漏流场的研究以及数值模拟所得数据对泄漏的检测、定位技术的研究具有重要参考意义。由伯努利方程、连续性方程组成的方程组表明当上游来流速度、下游静压强一定时,泄漏孔直径大小、入口速度、管道内外静压强差将影响流场特性。基于FLUENT的输水管道小孔泄漏流场数值模拟数据表明在模拟泄漏孔径范围内泄漏速度主要由管道内外静压强差决定,管道内外静压强差与泄漏速度成正相关关系。泄漏孔处的质量流量主要由泄漏孔直径、管道内外静压强差决定,管道内外静压强差一定时泄漏孔直径与泄漏孔处质量流量成正相关关系。泄漏孔直径大小、流场入口速度、管道内外压强差对流场入出口静压强差产生影响,数据显示流场入口速度的影响最大,与流场入出口静压强差成正相关关系。
The researches of fluid pipe small hole leakage and data of flow field numerical simulation had important reference significances to the technologies of leakage detection and location. The equations consisted of Bernoulli equation and continuity equation indicated characteristics of flow field ware influenced by leakage hole diameter, inlet velocity, the static pressure difference between inside and outside of the pipe when inlet velocity and outlet static pressure ware fixed values. The results of water pipeline small hole leakage numerical simulations based on FLUENT showed the leakage velocity was determined by static pressure differences between internal and external of leakage pipe, the leakage velocity had positively relation to static pressure differences between internal and external of leakage pipe. The mass flow rate of leakage hole was determined by leak hole diameter and static pressure differences between internal and external of leakage pipe, the mass flow rate of leakage hole had positively relation to static pressure differences between internal and external of leakage pipe. The static pressure differences between inlet and outlet ware influenced by leak hole diameter, inlet velocity and static pressure differences between internal and external of leakage pipe, the static pressure differences between inlet and outlet was major influenced by inlet velocity showed by data, the static pressure differences between inlet and outlet had positively relation to inlet velocity.
出处
《机电工程技术》
2015年第3期15-17,78,共4页
Mechanical & Electrical Engineering Technology
基金
山西省自然科学基金资助项目(编号:2013011026-2)
关键词
流体管道
小孔泄漏
仿真模型
fluidpipe
small hole leak
simulation model
