超/亚临界流体在反流式特斯拉阀中的压降分析  

Pressure drop analysis of supercritical/subcritical fluids in a reverse flow Tesla valve

作　　者：石家百 兰忠[1] 马学虎[1] SHI Jiabai;LAN Zhong;MA Xuehu(Institute of Chemical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学化工学院,辽宁大连116024

出　　处：《高校化学工程学报》2024年第5期703-713,共11页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金重点项目(51836002)。

摘　　要：超/亚临界流体急速泄压过程具有显著的节流膨胀效应,导致流动过程气液相变强度较常规两相流过程存在明显差别。针对这个问题,构建了流动过程分段节流膨胀模型,引入状态方程计算等焓过程的温度变化及相应产生的相变源,并耦合入流动相变方程,使数值模拟结果更符合迅速泄压过程的流动相变特性。在此基础上,提出以反流式特斯拉阀结构作为泄压部件的概念,并进行数值模拟分析和优化设计。综合考虑案例工况、流速、降压效果、加工特性等因素,该反流特斯拉阀降压部件的优化参数:水力直径为10 mm、阀的半圆半径为20 mm、阀角为40°~60°。Rapid pressure relief of sup/subcritical fluids has significant throttling and expansion effects,which leads to a significant difference in the intensity of vapor-liquid phase transition in flow processes compared with a typical two-phase flow process.A segmented throttling expansion model of the flow process was constructed to solve this problem.Equation of state was introduced to calculate temperature changes under the isenthalpic condition,which was coupled into the flow phase change equation,thus the numerical simulation results were more in line with the flow phase change characteristics of the rapid pressure relief process.A concept of counter-flow Tesla valve structure as a pressure relief component was proposed after the above study,and numerical simulation analysis and optimization design were carried out.Considering case conditions,flow rate,pressure relief effect,processing characteristics and other factors,the optimized parameters of this counter-flow Tesla valve pressure relief component were obtained as 10 mm in hydrodynamic diameter,20mm in semi-circular radius of the valve,and 40°-60°in valve angle.

关 键 词：节流膨胀效应 特斯拉阀 压降 计算流体力学 数值模拟 

分 类 号：X703.1[环境科学与工程—环境工程]