机电工程技术2024，Vol.53Issue(4)：222-226,5.DOI:10.3969/j.issn.1009-9492.2024-00023
板翅式换热器内气液两相流分配特性数值分析
Study on Distribution Characteristics of Gas-liquid Two-phase Flow in Plate-fin Heat Exchanger
摘要
Abstract
Plate-fin heat exchanger is the main heat exchange equipment for liquefaction after offshore natural gas extraction.Because of its internal structure with multi-fin characteristics,it is easy to cause uneven flow distribution of each fin,which seriously affects the heat exchange efficiency.A three-dimensional unsteady model of two-phase flow in the head of plate-fin heat exchanger is constructed after the heat exchanger head is simplified.The effects of different gas phase volume fractions on the distribution characteristics of gas-liquid two-phase flow in plate-fin heat exchangers are analyzed by computational fluid dynamics(CFD)simulation.The research results show that when the volume fraction of gas phase at the entrance is 50%,the overall distribution inhomogeneity of gas phase is 0.50,and the overall distribution inhomogeneity of liquid phase is 0.03.The mass flow distribution of gas phase in each channel is low in the middle and high at both ends,while that of liquid phase is the opposite,which verifies the correctness that the distribution performance of two-phase flow is more complicated than that of single-phase flow.When the volume fraction of the gas phase at the inlet gradually increases,the mass flow difference between the middle channel and the two channels gradually increases,which indicates that the overall distribution of the fluid is gradually deteriorating.关键词
板翅式换热器/流体分配/液化天然气/数值模拟Key words
plate-fin heat exchanger/fluid distribution/liquefied natural gas/numerical simulation分类
化学化工引用本文复制引用
辛杰,唐凌虹,刘佳伦,王铎..板翅式换热器内气液两相流分配特性数值分析[J].机电工程技术,2024,53(4):222-226,5.基金项目
陕西省自然科学基础研究计划项目(2023-JC-YB-350) （2023-JC-YB-350）
