CIESC Journal ›› 2016, Vol. 67 ›› Issue (S1): 63-68.doi: 10.11949/j.issn.0438-1157.20160561

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Influences of primary nozzle diameter on steam ejector performance

FU Weina, LIU Zhongliang, LI Yanxia, WU Hongqiang, TANG Yongzhi   

  1. Key Laboratory of Enhanced Heat Transfer and Energy Conversion, Ministry of Education, Key Laboratory of Heat Transfer and Energy Conversion, Beijing Education Commission, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
  • Received:2016-04-27 Revised:2016-05-03 Online:2016-08-31 Published:2016-08-31
  • Supported by:

    supported by the Beijing Municipal Science & Technology Plan Project (Z111100058911006).

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Abstract:

The complex internal flow field of steam ejector was numerically simulated with commercial software FLUENT. The pressure and velocity variation of internal fluid in the flowing process were studied and analyzed. The influences of the mixing steam pressure and the outlet diameter of primary nozzle on the ejector performance of the steam ejector were discussed in a great length. It is found from the results that the entrainment ratio of the steam ejector remains constant first with the back pressure to its critical pressure and then decreases, nevertheless, the entrainment ratio initially increases sharply with the primary nozzle outlet diameter and then decreases after the outlet diameter exceeds a certain value. Therefore there exists a critical outlet pressure for the steam ejector that determines its operation states. The outlet diameter of main nozzle has an optimal range, in which the ejector obtains the best performance, and the dissipation loss of the shock wave is relatively small.

Key words: steam ejector, mixed steam pressure, primary nozzle outlet diameter, entrainment performance, shock wave, process systems, model, numerical simulation

CLC Number: 

  • TK124
[1] 索科洛夫Е Я, 津洛尔Н М. 喷射器[M]. 黄秋云,译.北京:科学出版社, 1977:280. SOKOLOFF Е Я, GiGGLE Н М. Ejector[M]. HUANG Q Y, trans. Beijing:Science Press, 1977:280.
[2] 陈伟雄, 种道彤, 严俊杰, 等. 含水喷射器装置性能的实验研究[J]. 工程热物理学报,2014,35(4):710-713. CHEN W X, ZHONG D T, YAN J J, et al. Experimental investigation of ejector performance on the two phase operation[J]. Journal of Engineering Thermophysics, 2014,35(4):710-713.
[3] CHEN W X, SHI C Y, HU M Q, et al. Numerical and experimental analysis of two phase flow in ejector[J]. Energy Procedia, 2014, 61:1298-1301.
[4] 马国强, 陶乐仁. 太阳能喷射式制冷系统的实验研究[J]. 制冷技术, 2014, 34(6):1-4. MA G Q, TAO L R, Experimental study of solar ejector refrigeration system[J]. Journal of Refrigeration Techno-logy, 2014, 34(6):1-4.
[5] KONG F, KIM H D, SETOGUCHI T. An investigation of the effective pressure ratio effects on the ejector-diffuser system[J]. Journal of Visualization, 2015, 18(1):31-34.
[6] HANAFI A S, MOSTAFA G M, WAHEED A, et al. 1-D mathematical modeling and CFD investigation on supersonic steam ejector in MED-TVC[J]. Energy Procedia, 2015, 75:3239-3252.
[7] LIN C, CAI W J, LI Y Z, et al. The characteristics of pressure recovery in an adjustable ejector multi-evaporator refrigeration system[J]. Energy, 2012, 46(1):148-155.
[8] YAZDANI M, ALAHYARI A A, RADCLIFF T D. Numerical modeling of two-phase supersonic ejectors for work-recovery applications[J]. International Journal of Heat and Mass Transfer, 2012, 55(21):5744-5753.
[9] ARIAFAR K, BUTTSWORTH D, Al-DOORI G, et al. Mixing layer effects on the entrainment ratio in steam ejectors through ideal gas computational simulations[J]. Energy, 2016, 95:380-392.
[10] WANG X D, DONG J L, LI A, et al. Numerical study of primary steam superheating effects on steam ejector flow and its pumping performance[J]. Energy, 2014, 78:205-211.
[11] WANG X D, DONG J L. Numerical study on the performances of steam-jet vacuum pump at different operating conditions[J]. Vacuum, 2010, 84(11):1341-1346.
[12] YUAN Y J, TAN L B, XU Y Y, et al. Three-dimensional CFD modeling and simulation on the performance of steam ejector heat pump for dryer section of the paper machine[J]. Vacuum, 2015, 122:168-178.
[13] WU H Q, LIU Z L, HAN B, et al. Numerical investigation of the influences of mixing chamber geometries on steam ejector performance[J]. Desalination, 2014, 353:15-20.
[14] 王金锋, 陶乐仁, 王永红, 等.蒸汽喷射器变工况性能的CFD探讨[J].制冷技术,2008, 36(3):44-48. WANG J F, TAO L R, WANG Y H, et al. CFD discuss of vapor ejector on variable condition[J].Refrigeration. 2008, 36(3):44-48.
[15] VARGA S, OLIVEIRA A C, DIACONU B. Influence of geometrical factors on steam ejector performance-a numerical assessment[J]. International Journal of Refrigeration, 2009, 32(7):1694-1701.
[16] 屈晓航, 田茂诚, 罗林聪, 等. 波纹状喷嘴蒸汽引射器性能分析[J]. 中国电机工程学报, 2014, 34(35):6255-6262. QU X H, TIAN M C, LUO L C, et al. Analysis of steam ejector performance with corrugated nozzle[J]. Proceedings of the CSEE, 2014, 34(35):6255-6262.
[17] 刘化勇. 超声速引射器的数值模拟方法及其引射特性研究[D]. 绵阳:中国空气动力研究与发展中心, 2009. LIU H Y. Development of numerical method and investigation on performances of supersonic ejectors[D]. Mianyang:China Aerodynamics Research and Development Center, 2009.
[18] RUANGTRAKOON N, THONGTIP T, APHORNRA-TANA S, et al. CFD simulation on the effect of primary nozzle geometries for a steam ejector in refrigeration cycle[J]. International Journal of Thermal Sciences, 2013, 63:133-145.
[19] CHEN W X, CHONG D T, YAN J J, et al. The numerical analysis of the effect of geometrical factors on natural gas ejector performance[J]. Applied Thermal Engineering, 2013, 59(1):21-29.
[20] CHEN S J, CHEN G M, FANG L Y. An experimental study and 1-D analysis of an ejector with a movable primary nozzle that operates with R236fa[J]. International Journal of Refrigeration, 2015, 60:19-25.
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