CFD simulation on the effect of primary nozzle geometries for a steam ejector in refrigeration cycle

被引:170
作者
Ruangtrakoon, Natthawut [1 ]
Thongtip, Tongchana [1 ]
Aphornratana, Satha [1 ]
Sriveerakul, Thanarath [2 ]
机构
[1] Thammasat Univ, Sirindhorn Int Inst Technol, Pathum Thani 12121, Thailand
[2] Ubon Ratchathani Univ, Dept Mech Engn, Ubon Ratchathani 34190, Thailand
关键词
Ejector; Jet refrigeration; Jet cooling; CFD; Primary nozzle; COMPUTATIONAL FLUID-DYNAMICS; PERFORMANCE PREDICTION; FLOW STRUCTURE;
D O I
10.1016/j.ijthermalsci.2012.07.009
中图分类号
O414.1 [热力学];
学科分类号
摘要
In this study, the CFD technique was employed to investigate the effect of the primary nozzle geometries on the performance of an ejector used in the steam jet refrigeration cycle. In all cases, only one fixed-geometry mixing chamber together with eight different primary nozzles was investigated numerically using the commercial CFD package, FLUENT 6.3. The effects on the primary fluid pressure, mass flow rate and Mach number were observed and analyzed. The Mach number contour lines were used to explain the mixing process occurring inside the ejector. It was found that shock's position of the mixed fluid and the expansion angle of the primary fluid jet stream within the mixing chamber played a very important role in the ejector performance. (C) 2012 Elsevier Masson SAS. All rights reserved.
引用
收藏
页码:133 / 145
页数:13
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