超重力旋转床气相传质 CFD 仿真分析及实验验证.pdf

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超重力旋转床气相传质CFD仿真分析及实验验证
周晓伟,张新玉,杨斌,于平安
(哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001)
摘要:为了研究闭式循环柴油机中超重力旋转床的水吸收二氧化碳过程,开展了仿真与实验研究。建立旋转床
三维物理模型,采用欧拉一拉格朗日两相流模型对气液流场进行流体力学计算。以希格比的溶质渗逶理论为基础,
设置气相源项,对液相吸收二氧化碳过程进行仿真。并通过实验验证不同操作参数对其吸收性能的影响。结果
表明:吸收过程在靠近丝网与分布器位置较为强烈,吸收性能随着旋转床转速与吸收因数增加而加强,随着进
气浓度增加而降低。仿真中设置的源项能模拟床内吸收的过程,仿真与实验得出的液相质单元数有较高的一
致性,平均相对误差在10%左右,最大误差为20.6%,在高进气浓度下仿真偏差较大。总的来说,仿真能较好地
模拟实际二氧化碳在旋转床中的吸收过程。
关键词:旋转床;欧拉-拉格朗日;溶质渗透模型;二氧化碳吸收
中图分类号:TQ1.3文献标志码:A文章编号:1000-6613(2014)04-0837-07
DOL:10.3969/issn.1000-6613.2014.04.008
CFD simulation and experimental verification of as phase mass transfer
in rotating packed bed
ZHOU Xiaowei, ZIANG Xinyu, YANG Bin, YU Ping am
( School of Power and Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China)
Abstract: Simulation and experimental research were performed to study the mass transfer process of
rotating packed bed in closed-cycle diesel engine. A 3-D physical model was set up Euler-lagrange
model was used to solve the gas-liquid phase flow field in the model Based on Higbie's percolation
theory, gas phase source term was set up to simulate the process of water dissolving CO2. Experiments
were conducted to determine the effect of different operation parameters on absorption ability. The
result showed that the mass transfer process was more intense around the distributor and mesh wire
The performance was better with higher absorption factor and faster rotational speed, also with lower
inlet CO concentration. The number of transfer unit obtained from simulation was similar with that
obtained from experiments, and the averaged relative error was around 10% and the maximum error
was 20.6% so the source term could simulate the actual absorption process and the actual CO
absorption process could be simulated
Key words: rotating packed bed(RPB); euler-lagrange model; percolation model; CO2 absorption
超重力旋转床是一种高效的强化混合与传质的水脱除循环尾气中的二氧化碳6?。由于闭式循环柴
新型设备,相比普通传质设备,超重力设备具有液油机常用于水下潜器,常规传质设备由于传质能力
泛速率高、停留吋间短、传质系数高等多种优势
引起了工业界的密切关注,现在已广泛应用于吸收、收稿日期:2013-10-29:修改稿日期:20115
解吸、精馏、脱氧等各个化工领域?。本文涉及的
第一作者:周晓伟(1989-),男,硕士研究生,研究主要方向为闭式
循环柴油机部件性能。联系人:张新玉,教授。E- mail zhangxinyu@
超重力旋转床用于闭式循环柴油机装置中,利用海 haben.edu. en