[1]朱科钤,李美香,蔡婷婷,等.小间距多孔受限射流流场特性实验研究[J].常州大学学报(自然科学版),2019,31(01):35-40,54.[doi:10.3969/j.issn.2095-0411.2019.01.006]
　ZHU Keqian,LI Meixiang,CAI Tingting,et al.Experimental Investigation on Flow Field Characteristics of Confined Multiple Impinging Jets at Small Nozzle-to-Plate Distances[J].Journal of Changzhou University(Natural Science Edition),2019,31(01):35-40,54.[doi:10.3969/j.issn.2095-0411.2019.01.006]
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小间距多孔受限射流流场特性实验研究()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
第31卷
期数:
2019年01期
页码:
35-40,54
栏目:
机械制造及其自动化
出版日期:
2019-01-28

文章信息/Info

Title:
Experimental Investigation on Flow Field Characteristics of Confined Multiple Impinging Jets at Small Nozzle-to-Plate Distances
文章编号:
2095-0411(2019)01-0035-06
作者:
朱科钤; 李美香; 蔡婷婷; 丁建宁
(常州大学 机械工程学院, 江苏 常州 213164)
Author(s):
ZHU Keqian;  LI Meixiang;  CAI Tingting;  DING Jianning
(School of Mechanical Engineering, Changzhou University, Changzhou 213164, China)
关键词:
小间距;  受限射流;  多孔射流;  流场特性;  PIV
Keywords:
small nozzle-to-plate distance;  confined impinging jets;  multiple impinging jets;  flow field characteristics;  PIV
分类号:
TP 60
DOI:
10.3969/j.issn.2095-0411.2019.01.006
摘要:
应用PIV测试技术,对雷诺数Re为2 738～6 024、射流喷口孔间距S为12,16,24 mm以及受限高度H为1～5 mm的多孔射流流场进行实验研究,以揭示小间距内(H≤D)流场特性的影响规律。研究结果表明,小间距流场复杂多变,明显区别于大间距下的流场,其流型对受限高度最敏感,其后依次是射流孔间距、雷诺数。当H降至1 mm时,射流速度在背压的作用下,喷口附近的竖直分量和边界层附近的切向分量都超过喷口最大出流速度的值。
Abstract:
Particle image velocimetry(PIV)was employed to investigate flow field characteristics of confined multiple impinging air jets with small nozzle-to-plate spacing. The flow structures were compared for Reynolds numbers(Re)ranging from 2 738 to 6 024, nozzle-to-nozzle spacing(S)of 12, 16 and 24mm, and confined height(H)varying from 1 to 5mm respectively. Results show that the crossflow configuration was complex and changeable, which is very different from that of larger distances. The type of flow pattern had the closest relationship with the H, followed by S and Re. In addition, when the H drops to 1mm both the vertical velocity of the section near the nozzles and the tangential velocity near the boundary layer exceed the maximum outflow velocity of the nozzle.

参考文献/References:


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备注/Memo

备注/Memo:
收稿日期:2018-10-14。
基金项目:国家自然科学基金重点资助项目(51335002)。
作者简介:朱科钤(1980—),女,江苏常州人,硕士,讲师。E-mail:zkq@cczu.edu.cn
更新日期/Last Update: 2019-02-20