超音速和亚音速喷嘴对可调式喷射器性能的影响

doi:10.11949/j.issn.0438-1157.20170270

化工学报 ›› 2018, Vol. 69 ›› Issue (4): 1405-1411.DOI: 10.11949/j.issn.0438-1157.20170270

超音速和亚音速喷嘴对可调式喷射器性能的影响

金旭^1,2, 于跃¹, 陈作舟², 党超镔², 刘忠彦¹

1. 东北电力大学能源与动力工程学院, 吉林省吉林市 132012;
2. 东京大学新领创成科学研究科人间环境专业, 日本千叶 277-8563

收稿日期:2017-03-21 修回日期:2018-01-05 出版日期:2018-04-05 发布日期:2018-04-05
通讯作者: 刘忠彦
基金资助:
吉林省教育厅科学技术项目（JJKH20180097KJ）：吉林省科技厅重点科技研发项目（20180201006SF）。

Effects of supersonic and subsonic nozzles on performance of adjustable ejectors

JIN Xu^1,2, YU Yue¹, CHEN Zuozhou², DANG Chaobin², LIU Zhongyan¹

1. School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, China;
2. Department of Human and Engineered Environmental Studies, The University of Tokyo, Chiba, 277-8563, Japan

Received:2017-03-21 Revised:2018-01-05 Online:2018-04-05 Published:2018-04-05
Supported by:
supported by the Science and Technology Project of Educational Commission of Jilin Province, China(JJKH20180097KJ) and the Key Technology Researchable Project of Science and Technology Commission of Jilin Province, China(20180201006SF).

摘要/Abstract

摘要：

以探针轴向移动的可调式喷射器为研究对象，对超音速和亚音速两种喷嘴配置的喷射器性能进行了实验和模拟研究。结果显示：喷嘴出口驱动流流动特性与喷射器性能有着密切关系，且是导致两种喷嘴配置的喷射器性能调节差异性的主要原因。对于超音速喷嘴，喷嘴出口驱动流状态随探针位置发生改变，而亚音速喷嘴无此变化特性。通过探针调节喷射器性能过程中，当超音速喷嘴出口驱动流为理想膨胀时，系统处于最优运行状态；而当驱动流为过膨胀时，将产生压缩激波，系统性能降低，且低于亚音速喷嘴。进而，提出了两种配置喷嘴的选择方案。

关键词: 喷射器, 喷嘴配置, 可调节, 激波, R134a

Abstract:

An adjustable ejector with axial moving probe was taken as the object, the effects of ejector with supersonic and subsonic nozzles were investigated by experiment and simulation. The results showed that the flow characteristics of nozzles exit driving flow has close relationship with performance of the ejector, and was the main reason for the differences of the performance on the ejectors of two configurations of nozzles. For supersonic nozzles, the state of the nozzle exit's driving flow varies with the position of the probe, while the subsonic nozzle has no such variation characteristic. In the process of adjusting the performance of the ejector through the probe, when the supersonic nozzle exit's driving flow was ideally-expanded, the system was at an optimal operating condition. While the driving flow was over-expanded, the compression shock waves would be generated, the system performance would be reduced and its performance was inferior to the performance of subsonic nozzle. Furthermore, alternatives for two nozzle configurations were proposed.

Key words: ejector, nozzle configuration, adjustable, shock waves, R134a

中图分类号:

TB61

金旭, 于跃, 陈作舟, 党超镔, 刘忠彦. 超音速和亚音速喷嘴对可调式喷射器性能的影响[J]. 化工学报, 2018, 69(4): 1405-1411.

JIN Xu, YU Yue, CHEN Zuozhou, DANG Chaobin, LIU Zhongyan. Effects of supersonic and subsonic nozzles on performance of adjustable ejectors[J]. CIESC Journal, 2018, 69(4): 1405-1411.

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超音速和亚音速喷嘴对可调式喷射器性能的影响

Effects of supersonic and subsonic nozzles on performance of adjustable ejectors

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