CFD analysis of ejector in a combined ejector cooling system
CFD analysis of ejector in a combined ejector cooling system
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DOI：
10.1016/j.ijrefrig.2005.02.005
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发表时间：
2005-11-01
期刊：
影响因子：
--
通讯作者：
Ooi, A
中科院分区：
文献类型：
--
作者：
Rusly, E;Aye, L;Ooi, A
一维喷射器分析通常使用从一组功能有限的操作条件的实验数据中得出的系数。在本研究中，使用有限体积CFD技术对几种喷射器设计进行了建模，以解决喷射器中的流动动力学问题。CFD计算结果与现有实验数据进行了验证。对实验范围外的喷射器进行了流场分析和性能预测。在验证过程中，尽管没有在喷射器中记录到冲击，但来自CFD的数据在确定的面积比上预测的夹带比具有更高的准确性。在实验范围之外的预测-在联合喷射器-蒸汽压缩系统的操作条件下-以及由喷射器几何变化引起的流动条件进行了讨论。结果表明，最大吸射比出现在激波发生前的喷射器内，喷射器的位置是喷射器设计的重要参数。(c) 2005爱思唯尔有限公司和IIR。版权所有。
One-dimensional ejector analyses often use coefficients derived from experimental data for a set of operating conditions with limited functionality. In this study, several ejector designs were modelled using finite volume CFD techniques to resolve the flow dynamics in the ejectors. The CFD results were validated with available experimental data. Flow field analyses and predictions of ejector performance outside the experimental range were also carried out. During validation, data from CFD predicted the entrainment ratios with greater accuracy on definite area ratios, although no shock was recorded in the ejector. Predictions outside the experimental range-at operating conditions in a combined ejector-vapour compression system-and flow conditions resulting from ejector geometry variations are discussed. It is found that the maximum entrainment ratio happens in the ejector just before a shock occurs and that the position of the nozzle is an important ejector design parameter. (c) 2005 Elsevier Ltd and IIR. All rights reserved.