潜热输送介质颗粒沉降速度的固-液两相流模拟  

SOLID-LIQUID TWO-PHASE FLOW SIMULATION ON PARTICLE DEPOSITION VELOCITY USING FOR LATENT HEAT TRANSPORTATION

作　　者：宋文吉[1] 肖睿[1] 冯自平[1] 黄冲[1] 黎涛[1] 董凯军[1] 

机构地区：[1]中科院可再生能源与天然气水合物重点实验室,中国科学院广州能源研究所,广东广州510640

出　　处：《工程热物理学报》2010年第10期1693-1696,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.U0634005);中国科学院知识创新工程重要方向项目(No.KGCX2-YW-345)

摘　　要：颗粒的沉降速度是水力输送中的重要问题。中央空调系统或区域供冷系统中,使用TBAB包络化合物浆作为载冷介质进行潜热输送时同样面临输送安全问题。本文通过建立固液两相流模型,对管内截面速度分布和颗粒浓度分布进行模拟,根据颗粒分层情况判断其临界沉降速度,得到颗粒临界沉降速度随固相含量的变化规律,从而为安全输送提供依据。Critical deposition velocity is an important issue for safe hydraulic transportation, the same happens in centralized air-conditioning systems and district cooling systems with latent heat transportation using Tetra-n-Butyl-Ammonium Bromide Clathrate Hydrate Slurry （TBAB CHS） as secondary coolant. In this paper, one solid-liquid two-phase model was established. Based on that, the velocity profile and particle concentration distribution profile on cross section were calculated. Then, critical deposition velocities were analyzed according to stratification status along vertical direction, and the relationship between critical deposition velocity and solid mass fraction was obtained. All these could provide guidelines for safe transportation design.

关 键 词：临界沉降速度 固液两相流 潜热输送 TBAB 包络化合物浆 

分 类 号：TB61[一般工业技术—制冷工程]