Wet-gas Flow Characteristics and Structural Optimization of Venturi Divergent Section

Xu Ying; Wang Yadan; Zhang Tao; Wang Jinghan

doi:10.13433/j.cnki.1003-8728.20180033

Volume 37 Issue 8

Aug. 2018

Turn off MathJax

Article Contents

Article Navigation > Mechanical Science and Technology for Aerospace Engineering > 2018 > 37(8): 1272-1279

Xu Ying, Wang Yadan, Zhang Tao, Wang Jinghan. Wet-gas Flow Characteristics and Structural Optimization of Venturi Divergent Section[J]. Mechanical Science and Technology for Aerospace Engineering, 2018, 37(8): 1272-1279. doi: 10.13433/j.cnki.1003-8728.20180033

Citation:

Xu Ying, Wang Yadan, Zhang Tao, Wang Jinghan. Wet-gas Flow Characteristics and Structural Optimization of Venturi Divergent Section[J]. Mechanical Science and Technology for Aerospace Engineering, 2018, 37(8): 1272-1279. doi: 10.13433/j.cnki.1003-8728.20180033

Citation:

PDF( 1090 KB)

Wet-gas Flow Characteristics and Structural Optimization of Venturi Divergent Section

doi: 10.13433/j.cnki.1003-8728.20180033

1.
School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China

Received Date: 2017-04-26
Publish Date: 2018-08-05

Abstract

Abstract

In this paper, a theoretical analysis of the accelerated pressure drop and the frictional pressure drop of the Venturi divergent section was carried out. Based on the long throat Venturi with a diameter of 50 mm and beta ratio of 0.55, 4 kinds of structures were designed from the divergent angle and the shape of divergent section by numerical simulation method of computational fluid dynamics (CFD). Finding the optimal structure used in wet-gas flow can improve the linear identification of up and down differential pressure ratio K with liquid volume fraction (LVF). Simulation data coincide with theoretical analysis results. The results showed that the value of K rises with the increase of the divergent angle, but it is difficult to realize the linear identification. The elliptical arc divergent section can improve resolving power of K to liquid phase by decreasing the accelerated pressure drop and increasing the friction pressure drop. It is necessary to ensure the smooth connection between the divergent section and straight pipe section, so as to ensure the stability of the flow pattern. The divergent section of the elliptic arc structure connects with linear structure smoothly ensuring the stability of wet-gas flow, meanwhile the linearity between K and LVF is broadened from the original 1.5% to 4.5%.
- Venturi,
- divergent section,
- wet-gas,
- accelerate pressure drop,
- frictional pressure drop,
- differential pressure ratio,
- liquid volume fraction

FullText(HTML)

References(19)

References

[1]	International Organization for Standards. Measurement of wet gas flow by means of pressure differential devices inserted in circular cross-section conduits, ISO/TR11583[R]. London:ISO, 2012
[2]	Spialter M L. Characteristics of two phase flow through a vertical venturi[D]. New York:New York University, 1952
[3]	Murdock J W. Two-phase flow measurement with orifices[J]. Journal of Basic Engineering, 1962,84(4):419-432
[4]	Chisholm D. Void fraction during two-phase flow[J]. Journal of Mechanical Engineering Science, 1973,15(3):235-236
[5]	De Leeuw R. Liquid correction of venturi meter readings in wet gas flow[R]. Kristiansand:North Sea Flow Measurement Workshop, 1997
[6]	Steven R N. Wet gas metering with a horizontally mounted venturi meter[J]. Flow Measurement and Instrumentation, 2002,12(5-6):361-372
[7]	Reader-Harris M, Nel T, Graham E. An improved model for venturi-tube overreading in wet gas[R]. Norway:Proceedings of the 27th International North Sea Flow Measurement Workshop, 2009
[8]	张强,徐英,张涛.基于长喉径文丘里管的双差压湿气流量测量[J].天津大学学报,2012,45(2):147-153 Zhang Q, Xu Y, Zhang T. Wet gas metering based on dual differential pressure of long throat Venturi tube[J]. Journal of Tianjin University, 2012,45(2):147-153(in Chinese)
[9]	徐英,张涛,袁超,等.双比值法湿气液相含率测量装置:中国,CN106052775A[P].2016-10-26 Xu Y, Zhang T, Yuan C,et al. Moisture liquid phase containing rate measurement device using dual-ratio method:China, CN106052775A[P]. 2016-10-26(in Chinese)
[10]	Agar J, Farchy D. Wet gas metering using dissimilar flow sensors:theory and field trial results[R]. San Antonio, Texas:Society of Petroleum Engineers, 2002:1-6
[11]	Solartron ISA. Dualstream Ⅱ:Development of a new intelligent wet gas meter, ISA102[R]. Durham:Solartron, 2001
[12]	徐英,谭晋飞,巴玺丽,等.长喉颈文丘里喉部取压位置对湿气测量模型影响的试验研究[J].机械工程学报,2014,50(12):157-164 Xu Y, Tan J F, Ba X L, et al. Experimental study on the influence of longer throat Venturi tube pressure tappings position to wet gas measurement model[J]. Journal of Mechanical Engineering, 2014,50(12):157-164(in Chinese)
[13]	Kumar P, San S M. CFD study of the effect of venturi convergent and divergent angles on low pressure wet gas metering[J]. Journal of Applied Sciences, 2014,14(22):3036-3045
[14]	阎昌琪.气液两相流[M].2版.哈尔滨:哈尔滨工程大学出版社,2010 Yan C Q. Gas-liquid two-phase flow[M]. 2nd ed. Harbin:Harbin Engineering University Press, 2010(in Chinese)
[15]	Yu P N, Xu Y, Zhang T, et al. A study on the modeling of static pressure distribution of wet gas in Venturi[J]. AIChE Journal, 2015,61(2):699-708
[16]	张也影.流体力学[M].2版.北京:高等教育出版社,1999 Zhang Y Y. Fluid dynamics[M]. 2nd ed. Beijing:Higher Education Press, 1999(in Chinese)
[17]	Lockhart R W, Martinelli R C. Proposed correlation of data for isothermal two-phase,two-component flow in pipes[J]. Chemical Engineering Progress, 1949,45(1):39-48
[18]	徐英,蒋荣,张涛,等.基于文丘里流量传感器的湿气两相流量模型研究[J].传感器与微系统,2016,35(5):4-8 Xu Y, Jiang R, Zhang T, et al. Research on two-phase flow model for wet gas based on Venturi flow sensor[J]. Transducer and Microsystem Technologies, 2016,35(5):4-8(in Chinese)
[19]	Xu Y, Gao L, Zhao Y, et al. Wet gas overreading characteristics of a long-throat Venturi at high pressure based on CFD[J]. Flow Measurement and Instrumentation, 2014,40:247-255