高气液流速下垂直管两相流实验及数值模拟研究

摘要

In order to make up the flow experiment and theoretical study blank of gas-liq-uid two-phase flow in vertical pipes under high gas-liquid flow rate, take water and air as the experimental medium, and perform two-phase flow experimental research with high gas-water capacity vertically upward on the multi-phase flow experimental platform.The experi-ment was proposed in the transparent organic glass pipe with an inner diameter of 60 mm and a length of 9.4 m, and record the flow pattern by high speed camera; and on the basis of this experiment,by using the Fluent software in the vertical upward pipe,the numerical simula-tion during the gas-liquid two-phase flow process is studied. The experimental results show that: with high gas-liquid capacity, the flow patterns appeared in the vertical upward pipes are mainly stirred flow, annular flow and fine beam annular flow, while bubble and slug flow accounts for a small proportion;fluctuation of pressure drop curve and flow pattern transition are closely related.%为了弥补高气液流速下垂直管气液两相流流动实验和理论研究的空白，以水和空气为实验介质，在多相流实验平台上进行了垂直向上的高气液量下两相流实验研究。采用内径为60 mm、长9.4 m的透明有机玻璃管，利用高速摄像仪记录实验过程中的流型；在实验的基础上，利用Fluent软件对垂直上升管内气液两相流动过程进行了数值模拟。实验结果表明：在高气液量下，垂直向上管中出现的流型主要为搅混流、环状流和细束环状流，泡状流和弹状流所占的比例很小；压降波动曲线变化与流型转变间存在相关的联系。