The numerical analysis of the effect of geometrical factors on natural gas ejector performance

The numerical analysis of the effect of geometrical factors on natural gas ejector performance
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几何因素对天然气喷射器性能影响的数值分析

DOI:
10.1016/j.applthermaleng.2013.04.036
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发表时间:
2013-09
影响因子:
6.4
通讯作者:
JiPing Liu
JiPing Liu
中科院分区:
工程技术2区
文献类型:
--
作者:
WeiXiong Chen;DaoTong Chong;JunJie Yan;JiPing Liu

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超音速喷射器用于提高成熟油气田的产量和采收率。与压缩机相比,天然气喷射器是提高低压天然气威尔斯井产量的一种经济有效的方法。在这项研究中,两个主要的引射器的几何因素,主喷嘴出口位置(NXP)和混合管的长径比(R)的基础上的CFD技术进行了研究。此外,这两个几何因素被证明是影响喷射器性能的因素,不仅包括卷吸比,而且还包括压力比。计算结果表明,对于卷吸比,最佳NXP范围为3.6 ~ 7.2mm,而对于压比,最佳NXP范围为1.2- 7.2mm。最佳值R随一次流压力的增大而减小,最佳卷吸比R在2 ~ 8之间变化,压比R在3 ~ 7之间变化。计算流体力学技术被认为是一种有效的性能预测器,也提供了一个有见地的理解内的喷射器的流动和混合过程。该研究可为超声速引射器的设计提供有益的参考,并为进一步应用于天然气的增产提供帮助。
Supersonic ejectors are applied to increase production and recovery from mature oil and gas fields. Compared to compressors, natural gas ejectors are a cost-effective way to boost the production of low pressure natural gas wells. In this study, two main ejector geometrical factors, the primary nozzle exit position (NXP) and the mixing tube length to diameter ratio (R), are investigated based on the CFD technique. Additionally, these two geometrical factors are proved to be influential factors with respect to ejector performance, including not only the entrainment ratio but also the pressure ratio. The numerical results show that the optimum NXP for the entrainment ratio varies from 3.6 to 7.2 mm, but for the pressure ratio, it is in the range of 1.2–7.2 mm. The optimum valueRdecreases with increasing primary flow pressure, and the optimumRfor the entrainment ratio varies from 2 to 8, but for the pressure ratio, it is in the range of 3–7. The CFD technique is found to be an effective performance predictor and also provides an insightful understanding of the flow and mixing process within the ejector. This study may provide a beneficial reference for the design of supersonic ejectors and may be helpful for further applications in boosting natural gas production.
DOI: 10.1016/0140-6701(95)96874-c
发表时间: 1995
期刊: Journal of The Institute of Energy
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