基于实际气体的圆柱形混合室喷射器设计及优化方法

doi:10.11949/j.issn.0438-1157.20150150

化工学报 ›› 2015, Vol. 66 ›› Issue (10): 3881-3887.DOI: 10.11949/j.issn.0438-1157.20150150

基于实际气体的圆柱形混合室喷射器设计及优化方法

陈洪杰¹, 卢苇², 庄光亮¹

1 桂林航天工业学院建筑环境与能源工程系, 广西桂林 541004;
2 广西大学化学化工学院, 广西石化资源加工及过程强化技术重点实验室, 广西南宁 530004

收稿日期:2015-01-30 修回日期:2015-06-23 出版日期:2015-10-05 发布日期:2015-10-05
通讯作者: 卢苇
基金资助:
国家自然科学基金项目(51366001);广西自然科学基金项目(2013GXNSFAA019292);广西高校科学技术研究项目(YB2014439);桂林航天工业学院科研基金项目(YJ1306)。

Method for design and optimization of cylindrical mixing chamber ejector based on real gas properties

CHEN Hongjie¹, LU Wei², ZHUANG Guangliang¹

1 Department of Building Environment and Energy Engineering, Guilin University of Aerospace Technology, Guilin 541004, Guangxi, China;
2 Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China

Received:2015-01-30 Revised:2015-06-23 Online:2015-10-05 Published:2015-10-05
Supported by:
supported by the National Natural Science Foundation of China (51366001), the Natural Science Foundation of Guangxi Province (2013GXNSFAA019292), the University Science and Technology Research Project of Guangxi (YB2014439) and the Guilin University of Aerospace Technology research Foundation(YJ1306).

摘要/Abstract

摘要：

从热力学过程出发,通过引入单相及两相流声速计算模型,提出了基于实际气体的圆柱形混合室喷射器设计方法。用该方法计算出的喷射系数能与实验值较好吻合,误差在±17%内。新设计方法预测出必定存在一个使喷射系数设计值最大的最优混合室出口压力,为方便且快速确定该最优混合室出口压力与喷射器设计工况的关系,引入了最优扩压室升压比倒数。分别计算了水蒸气、氨、R290、R134a和R22圆柱形混合室喷射器常见工况下最优扩压室升压比倒数与膨胀比、压缩比的关系曲线,进而拟合出最优扩压室升压比倒数与膨胀比、压缩比的关系式。在喷射器设计过程中利用这些关系式可迅速算出最优扩压室升压比倒数,从而确定最优混合室出口压力,设计出高效喷射器。

关键词: 实际气体, 喷射器, 混合室出口压力, 热力学过程, 气液两相流, 优化设计

Abstract:

According to the thermodynamic process and the sound speed calculation models of the single/two-phase flow, a method with real gas is presented to design cylindrical mixing chamber ejectors. The entrainment ratios calculated by the proposed method match the experimental results relatively well with an error of ±17%. The proposed method predicts that there must be an optimal exit pressure of the mixing chamber corresponding to the maximum design entrainment ratio. The optimal reciprocal value of diffuser pressure ratio is introduced in order to determine the relationship between the optimal exit pressure of the mixing chamber and design conditions of ejectors conveniently and quickly. The relation curves of optimal reciprocal values of diffuser pressure ratios vs expansion and compression ratios for steam, ammonia, R290, R134a and R22 ejectors are calculated based on usual working conditions, and further the corresponding regression expressions are fitted. Those expressions can figure out the optimal reciprocal values of diffuser pressure ratios rapidly so as to obtain the optimal exit pressure of the mixing chamber, and thus a high efficient ejector can be designed.

Key words: real gas, ejector, mixing chamber exit pressure, thermodynamic process, gas-liquid two-phase flow, optimal design

中图分类号:

O354
TH48

陈洪杰, 卢苇, 庄光亮. 基于实际气体的圆柱形混合室喷射器设计及优化方法[J]. 化工学报, 2015, 66(10): 3881-3887.

CHEN Hongjie, LU Wei, ZHUANG Guangliang. Method for design and optimization of cylindrical mixing chamber ejector based on real gas properties[J]. CIESC Journal, 2015, 66(10): 3881-3887.

参考文献 21

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[11]	Kumar N S, Ooi K T. One dimensional model of an ejector with special attention to Fanno flow within the mixing chamber [J]. Applied Thermal Engineering, 2014, 65(1/2): 226-235.
[12]	Wang Fei(王菲), Lü Henglin(吕恒林), Feng Wei(冯伟), et al. Performance of two-phase ejector in compression/ejection refrigeration cycle [J]. CIESC Journal (化工学报), 2012, 63(10): 3094-3100.
[13]	Li Haijun (李海军), Shen Shengqiang (沈胜强). Study on special phenomena in the ejector used in an steam ejector refrigeration system [J]. Journal of Engineering Thermophysics (工程热物理学报), 2006, 27(3): 454-456.
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[15]	Liu F, Groll E A. Study of ejector efficiencies in refrigeration cycles [J]. Applied Thermal Engineering, 2013, 52(2): 360-370.
[16]	Huang B J, Chang J M, Wang C P. A 1-D analysis of ejector performance [J]. International Journal of Refrigeration, 1999, 22(5): 354-364.
[17]	Zhu Y H, Cai W J, Wen C Y, et al. Numerical investigation of geometry parameters for design of high performance ejectors [J]. Applied Thermal Engineering, 2009, 29(5/6): 898-905.
[18]	Nakagawa M, Marasigan A R, Matsukawa T, et al. Experimental investigation on the effect of mixing length on the performance of two-phase ejector for CO2 refrigeration cycle with and without heat exchanger [J]. International Journal of Refrigeration, 2011, 34(7): 1604-1613.
[19]	Wang Fei (王菲), Shen Shengqiang (沈胜强). Calculation and analysis for an ejector refrigeration system with various refrigerants [J]. CIESC Journal (化工学报), 2010, 61(2): 275-280.
[20]	Li Haijun (李海军), Shen Shengqiang (沈胜强). Analysis of ejector performance using dimensionless parameters [J]. Journal of Dalian University of Technology (大连理工大学学报), 2007, 47(1): 26-29.
[21]	Chen Hongjie (陈洪杰), Lu Wei (卢苇), Cao Cong (曹聪), et al. Applicability analysis on ejectors with cylindrical and conical mixing chambers [J]. CIESC Journal (化工学报), 2013, 64(6): 2043-2049.esign and solar-powered air-cooled ejector cooling systems for air conditioning[D]. Nanning: Guangxi University, 2013
[3]	Keenan J H, Neumann E P, Lustwerk F. An investigation of ejector design by analysis and experiment. ASME Journal of Applied Mechanics, 1950(72): 299-309
[4]	Addy A L, Dutton J C, Mikkelsen C D. Supersonic ejector-diffuser theory and experiments[R]. Urbana: Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, 1981
[5]	Yap?c? R, Ersoy H K. Performance characteristics of the ejector refrigeration system based on the constant area ejector flow model[J]. Energy Conversion and Management, 2005, 46(18-19): 3117-3135
[6]	Carrol B F, Dutton J C. A computer program for supersonic ejector optimization[R]. Urbana: Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, 1985
[7]	Соколов Е Я, Зингер Н М.Струйные аппараты[M]. Москва: Энергоатомиздат, 1989: 35-57
[8]	He S, Li Y, Wang R Z. Progress of mathematical modeling on ejectors[J]. Renewable and Sustainable Energy Reviews, 2009, 13(8): 1760-1780
[9]	Elakhdar M, Nehdi E, Kairouani L, et al. Simulation of an ejector used in refrigeration systems[J]. International Journal of Refrigeration, 2011, 34(7): 1657-1667
[10]	Vincenzo L, Pagh N M, Knudsen K S. Ejector design and performance evaluation for recirculation of anode gas in a micro combined heat and power systems based on solid oxide fuel cell[J]. Applied Thermal Engineering, 2013, 54(1): 26-34
[11]	Kumar N S, Ooi K T. One dimensional model of an ejector with special attention to Fanno flow within the mixing chamber [J]. Applied Thermal Engineering, 2014, 65(1-2): 226-235
[12]	Wang Fei(王菲), Lv Henglin(吕恒林), Feng Wei(冯伟), et al. Performance of two-phase ejector in compression/ejection refrigeration cycle[J]. Journal of Chemical Industry and Engineering (China) (化工学报), 2012, 63(10): 3094-3100
[13]	Li Haijun (李海军), Shen Shengqiang (沈胜强). Study on special phenomena in the ejector used in an steam ejector refrigeration system[J]. Journal of Engineering Thermophysics (China) (工程热物理学报), 2006, 27(3): 454-456.
[14]	Lund H, Flatten T. Equilibrium conditions and sound velocities in two-phase flows. SIAM 2010: SIAM annual meeting (AN 10), Pittsburgh, July 12-16, 2010[C]. Philadelphia: Society for Industrial and Applied Mathematics, 2010: 1-5
[15]	Liu F, Groll E A. Study of ejector efficiencies in refrigeration cycles[J]. Applied Thermal Engineering, 2013, 52(2): 360-370
[16]	Huang B J, Chang J M, Wang C P. A 1-D analysis of ejector performance[J]. International Journal of Refrigeration, 1999, 22(5): 354-364
[17]	Zhu Y H, Cai W J, Wen C Y, et al. Numerical investigation of geometry parameters for design of high performance ejectors. Applied Thermal Engineering, 2009, 29(5-6): 898-905
[18]	Nakagawa M, Marasigan A R, Matsukawa T, et al. Experimental investigation on the effect of mixing length on the performance of two-phase ejector for CO2 refrigeration cycle with and without heat exchanger[J]. International Journal of Refrigeration, 2011, 34(7): 1604-1613
[19]	Wang Fei (王菲), Shen Shengqiang (沈胜强). Calculation and analysis for an ejector refrigeration system with various refrigerants[J]. Journal of Chemical Industry and Engineering (China) (化工学报), 2012, 61(2): 275-280
[20]	Li Haijun (李海军), Shen Shengqiang (沈胜强). Analysis of ejector performance using dimensionless parameters[J]. Journal of Dalian University of Technology (China) (大连理工大学学报), 2007, 47(1): 26-29
[21]	Chen Hongjie (陈洪杰), Lu Wei (卢苇), Cao Cong (曹聪), et al. Applicability analysis on ejectors with cylindrical and conical mixing chambers[J]. Journal of Chemical Industry and Engineering (China) (化工学报), 2013, 64(6): 2043-2049

基于实际气体的圆柱形混合室喷射器设计及优化方法

Method for design and optimization of cylindrical mixing chamber ejector based on real gas properties

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