[1]陈 杰,余延顺.制冷剂雾化喷嘴节流性能研究[J].南京理工大学学报(自然科学版),2017,41(05):610.[doi:10.14177/j.cnki.32-1397n.2017.41.05.012]
 Chen Jie,Yu Yanshun.Study on throttling performance of refrigerant atomizing nozzle[J].Journal of Nanjing University of Science and Technology,2017,41(05):610.[doi:10.14177/j.cnki.32-1397n.2017.41.05.012]
点击复制

制冷剂雾化喷嘴节流性能研究()
分享到:

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
41卷
期数:
2017年05期
页码:
610
栏目:
出版日期:
2017-10-31

文章信息/Info

Title:
Study on throttling performance of refrigerant atomizing nozzle
文章编号:
1005-9830(2017)05-0610-06
作者:
陈 杰余延顺
南京理工大学 能源与动力工程学院,江苏 南京 210094
Author(s):
Chen JieYu Yanshun
School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,China
关键词:
液态制冷剂 分配均匀度 节流雾化性能 雾化喷嘴
Keywords:
liquid refrigerant distribution evenness throttling and atomization performance atomizing nozzles
分类号:
TB657.9
DOI:
10.14177/j.cnki.32-1397n.2017.41.05.012
摘要:
为提高制冷系统蒸发器内液态制冷剂的分配均匀度和换热性能,该文提出采用雾化喷嘴代替节流阀的雾化节流方案。采用计算流体动力学(CFD)方法对制冷剂的节流雾化特性进行模拟,分析了系统蒸发温度、冷凝温度、阀前过冷度等对制冷剂节流雾化特性的影响。结果表明,当蒸发温度、冷凝温度和过冷度的范围分别为5~15 ℃、45~55 ℃和0~8 K时,节流雾化喷嘴的出口流量在4.125~5.230 g/s之间波动,并受冷凝温度影响较大; 雾化流场中约90%的两相流体处于3 m/s以下的低速段时,雾化效果较好。冷凝温度升高、蒸发温度降低、过冷度减小均有利于雾化,但也造成雾化流场蒸发量不均,气流紊乱,使得湍动能边界产生剧烈波动,雾化不稳定。
Abstract:
In order to improve the distribution evenness and the heat transfer performance of the liquid refrigerant in the evaporator of the refrigeration system,an innovative scheme of an atomizing nozzle replacing the throttle valve is presented here.The throttling and atomization performance of the liquid refrigerant are simulated by the computational fluid dynamics(CFD)method,and the influences of the evaporation temperature,the condensation temperature and the sub-cooling temperature on the atomization performance of the liquid refrigerant throttling are analyzed.The results show that,the flow rate of the nozzle outlet fluctuates in 4.125~5.230 g/s when the ranges of the evaporation temperature,the condensation temperature and the sub-cooling temperature are 5~15 ℃,45~55 ℃ and 0~8 K respectively,and it is more sensitive to the condensation temperature.When the velocity of about 90% two-phase flow in the atomized flow field is below 3 m/s,the atomization performance is better.Increasing the condensation temperature and decreasing the evaporation temperature and the sub-cooling temperature are beneficial to atomization,but cause uneven evaporation and disorder airflow in the atomized flow field and then result in the violent fluctuation of the turbulence kinetic energy boundary,thus leading to the instability of atomization.

参考文献/References:

[1] Yang Z,Hrnjak P S.Effects of fluid properties on two-phase flow and refrigerant distribution in the vertical header of a reversible microchannel heat exchanger-comparing R245fa,R134a,R410A,and R32[J].Applied Thermal Engineering,2014,70(1):966-976.
[2]Kaern M R,Brix W,Elmegaard B,et al.Compensation of flow maldistribution in fin-and-tube evaporators for residential air-conditioning[J].International Journal of Refrigeration-revue Internationale Du Froid,2011,34(5):1230-1237.
[3]Ahmad M,Berthoud G,Mercier P.General characteristics of two-phase flow distribution in a compact heat exchanger[J].International Journal of Heat & Mass Transfer,2009,52(1-2):442-450.
[4]胡海涛.R410A-润滑油混合物管内流动沸腾换热和压降特性的研究[D].上海:上海交通大学制冷与低温研究所,2008.
[5]蒋弢,翁春生.雾化混合对气液两相脉冲爆轰发动机工作过程的影响[J].南京理工大学学报,2013,37(5):692-698.
Jiang Tao,Weng Chunsheng.Effect of atomization and mixtion on detonation process of gas-droplet two-phase pulse detonation engine[J].Journal of Nanjing University of Science and Technology,2013,37(5):692-698.
[6]石文星,王宝龙,邵双全.小型空调热泵装置设计[M].北京:中国建筑工业出版社,2013.
[7]朱辉.高压微细雾化喷嘴雾化特性研究[D].哈尔滨:哈尔滨工业大学能源科学与工程学院,2015.
[8]韩清.制冷剂分液器性能研究[D].上海:上海交通大学制冷与低温研究所,2014.
[9]陈斌,郭烈锦,张西民,等.喷嘴雾化特性实验研究[J].工程热物理学报,2001,22(2):237-240.
Chen Bin,Guo Liejin,Zhang Ximin,et al.Experimental investigation of spray characteristics of different nozzles[J].Journal of Engineering Thermodynamics,2001,22(2):237-240.
[10]文华.基于CFD柴油机喷雾混合过程的多维数值模拟[D].重庆:重庆大学能源与动力工程学院,2004.
[11]曹建明.喷雾学[M].北京:机械工业出版社,2005.
[12]Xue Q,Battistoni M,Powell C F,et al.An Eulerian CFD model and X-ray radiography for coupled nozzle flow and spray in internal combustion engines[J].International Journal of Multiphase Flow,2015,70:77-88.
[13]贺滔,夏春礼,丁利群,等.过冷度对喷嘴效率影响的测试研究[J].西安交通大学学报,2009,43(11):18-21.
He Tao,Xia Chunli,Ding Liqun,et al.Influence of sub-cooling on nozzle efficiency[J].Journal of Xi’an Jiaotong University,2009,43(11):18-21.

备注/Memo

备注/Memo:
收稿日期:2017-03-19 修回日期:2017-07-04

基金项目:国家自然科学基金(51406087)
作者简介:陈杰(1993-),男,硕士生,主要研究方向:空气源热泵,E-mail:550265776@qq.com; 通讯作者:余延顺(1975-),男,博士,教授,主要研究方向:高效制冷与热泵技术理论与实践,E-mail:yuyanshun@gmail.com。
引文格式:陈杰,余延顺.制冷剂雾化喷嘴节流性能研究[J].南京理工大学学报,2017,41(5):610-615.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2017-09-30