压力旋流式喷嘴喷淋液膜区换热过程的数值模拟

doi:10.11949/j.issn.0438-1157.20160927

化工学报 ›› 2017, Vol. 68 ›› Issue (2): 575-583.DOI: 10.11949/j.issn.0438-1157.20160927

压力旋流式喷嘴喷淋液膜区换热过程的数值模拟

潘阳敏¹, 罗祎青^1,2, 王丽雯¹, 袁希钢^1,2,3

1. 天津大学化工学院, 天津 300072;
2. 天津大学化学工程研究所, 天津 300072;
3. 化学工程联合国家重点实验室, 天津 300072

收稿日期:2016-07-04 修回日期:2016-12-14 出版日期:2017-02-05 发布日期:2017-02-05
通讯作者: 罗祎青
基金资助:
国家自然科学基金项目（21676183）。

Numerical simulations on sheet region of spray cooling process of pressure-swirl nozzle

PAN Yangmin¹, LUO Yiqing^1,2, WANG Liwen¹, YUAN Xigang^1,2,3

1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. Chemical Engineering Research Center, Tianjin University, Tianjin 300072, China;
3. State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China

Received:2016-07-04 Revised:2016-12-14 Online:2017-02-05 Published:2017-02-05
Supported by:
supported by the National Natural Science Foundation of China(21676183).

摘要/Abstract

摘要：

利用Fluent软件对压力旋流式喷嘴的内外流场进行了数值模拟，以等效的二维网格模型模拟圆周对称的三维流动，多相流和湍流模型分别采用VOF和雷诺应力模型。在两种条件下，对喷嘴流场进行模拟：①气相为空气，不发生相间热质传递；②气相为饱和水蒸气，发生相间热质传递。相变模型采取Fluent中内嵌的Lee模型。将数值模拟结果同实验结果进行对比，并以数值模拟的数据对喷嘴内外流场展开分析。模拟结果显示，由于液相在喷嘴旋流室内的螺旋运动，导致喷嘴内部形成“空气芯”，液相速度在喷嘴旋流室与收缩段的连接处变化剧烈；另外，发生相间热质传递条件下，流场的压力要整体稍低且速度场的速度最大值更大；液膜的传热系数沿液膜流动方向不断减小；因气相冷凝使得液膜厚度更大，液膜破碎长度也因蒸气冷凝而变得更长。

关键词: 喷嘴, 流体力学, 数值模拟, 传质, Lee相变模型

Abstract:

The commercial software Fluent 15.0 is employed to carry out the numerical simulation on the internal and external flow fields of the pressure-swirl nozzle. The axisymmetric 3-D flow field is represented by an equivalent 2-D grid. The VOF multiphase flow model and Reynolds stress model (RSM) are chosen. Numerical simulations on flow fields are performed in two different circumstances:① Gas phase is specified as air and there is no heat and mass transfer between phases; ② Gas phase is saturated steam, heat and mass transfer exists between phases. Lee model, a computational model embedded in Fluent 15.0, is specified as the phase-transition model of heat transfer. Comparisons between CFD simulations and experiment are launched. The internal and external flow fields are analyzed based on simulation datum. Results indicate that an air core forms inside the nozzle due to the helical motion of liquid phase, velocity of which increases sharply at the junction of contraction section and orifice's straight pipe section of the nozzle. Furthermore, comparisons are also performed between circumstance ① and ②. Numerical simulation results indicate that when heat and mass transfer exists between phases (i.e. in case of circumstance ②), (1) pressure of the flow fields is slightly lower and peak velocity is larger; (2) heat transfer coefficient of liquid film decreases gradually along the flow direction; (3)the film is thicker due to the vapor condensation, and liquid film breakup length is larger.

Key words: nozzle, fluid mechanics, numerical simulation, mass transfer, Lee model

中图分类号:

TQ021.3

潘阳敏, 罗祎青, 王丽雯, 袁希钢. 压力旋流式喷嘴喷淋液膜区换热过程的数值模拟[J]. 化工学报, 2017, 68(2): 575-583.

PAN Yangmin, LUO Yiqing, WANG Liwen, YUAN Xigang. Numerical simulations on sheet region of spray cooling process of pressure-swirl nozzle[J]. CIESC Journal, 2017, 68(2): 575-583.

参考文献 24

[1]	陈建民, 杨娜, 罗铭芳, 等. 常减压装置减压深拔技术研究进展[J]. 现代化工, 2010, 6:20-24. CHEN J M, YANG N, LUO M F, et al. Research progress in deep-cut technology in crude oil distillation unit[J]. Modern Chemical Industry, 2010, 6:20-24.
[2]	徐刚.CFD在旋流喷嘴设计中的应用研究[D].上海:上海交通大学, 2008. XU G. Applied research of CFD in the design of pressure-swirl nozzle[D]. Shanghai:Shanghai Jiao Tong University, 2008.
[3]	ARUNVIJAY G, SHENBAGA N, MANIVANNAN A. Internal and external flow characteristics of swirl atmizers:a review[J]. Atomization and Sprays, 2015, 25(2):153-188.
[4]	ABULLAH A, INGO J, HAL G, et al. Numerical simulation of water spray in natural draft dry cooling towers with a new nozzle representation approach[J]. Applied Thermal Engineering, 2016, 98:924-935.
[5]	KIM S, KHIL T, KIM D, et al. Effect of geometric parameters on the liquid film thickness and air core formation in a swirl injector[J]. Measurement Science and Technology, 2010, 21(3):015403.
[6]	JENG S M, JOG M A. Computational and experimental study of liquid sheet emanating from simplex fuel nozzle[J]. AIAA, 1998, 36(2):201-207.
[7]	BELHADEF A, VALLET A, AMIELH M, et al. Pressure-swirl atomization:modeling and experimental approaches[J]. International Journal of Multiphase Flow, 2012, 39:13-20.
[8]	Amini G. Liquid flow in a simplex swirl nozzle[J]. International Journal of Multiphase Flow, 2016, 79:225-235.
[9]	WEINBERG S. Heat transfer to low pressure sprays of water in a steam atmosphere[J]. Inst. Mech. Engrs., 1952, 6(1B):240-253.
[10]	MAYINGER F, CHAVEZ A. Measurement of direct contact condensation of pure saturated vapor on an injection spray by applying pulsed laser holography[J]. Int. J. Heat Mass Transf., 1992, 35(3):691-702.
[11]	LEKIC A, FORD J D. Direct contact condensation of vapour on a spray of subcooled liquid droplets[J]. Int. J. Heat Mass Transfer, 1980, 23:1531-1537.
[12]	LEE S Y, TANKIN R S. Study of liquid spray (water) in a condensable environment (steam)[J]. Int. J. Heat Mass Transfer, 1984, 27(3):363-374.
[13]	TAKAHASHI M, NAYAK A K, KITAGAWA S I, et al. Heat transfer in direct contact condensation of steam to subcooled water spray[J]. Journal of Heat Transfer, 2001, 123(4):703-710.
[14]	MA Z. Investigation on the internal flow characteristics of pressure-swirl atomizer[D]. Cincinnati:University of Cincinnati, 2001.
[15]	王福军. 计算流体动力学分析--CFD软件原理与应用[M]. 北京:清华大学出版社, 2004:7-13. WANG F J. Computational Fluid Dynamics Analysis-the Principle and Application of CFD Software[M]. Beijing:Tsinghua University Press, 2004:7-13.
[16]	LEE W H. A Pressure Iteration Scheme for Two-phase Flow Modeling[M]. Washington:Hemishpere Publishing, 1980:50-200.
[17]	LIU Z Y, SUNDEN B, YUAN J L. VOF modeling and analysis of filmwise condensation between vertical parallel plates[J]. Heat Transfer Research, 2012, 43(1):47-68.
[18]	CHEN S, YANG Z, DUAN Y, et al. Simulation of condensation flow in a rectangular microchannel[J]. Chem. Eng. Process.:Process Intensification, 2014, 76:60-69.
[19]	DARIVA E, DELCOL D. Effect of gravity during condensation of R134a in a circular minichannel[J]. Microgravity Sci. Tech., 2011, 23:87-97.
[20]	LEE H, KHARANGATE C R, MASCAR ENHAS N, et al. Experimental and computational investigation of vertical downflow condensation[J]. International Journal of Heat and Mass Transfer, 2015, 85:865-879.
[21]	KNUDSEN M. Kinetic Theory of Gases:Some Modern Aspects[M]. New York:Wiley Press, 1950:103-160.
[22]	HIBIKI T. One-group interfacial area transport of bubbly flows in vertical round tubes[J]. International Journal of Heat and Mass Transfer, 2000, 43:2711-2726.
[23]	IBRAHIM A A. Comprehensive study of internal flow field and linear and nonlinear instability of an annular liquid sheet emanating from an atomizer[D]. Cincinnati:University of Cincinnati, 2006.
[24]	XIE K C. Numerical simulation of the flow characteristics within a pressure-swirling atomizer[C]//Turbo Expo 2014. Turbine Technical Conference and Exposition. Germany:ASME, 2014:1-5.

压力旋流式喷嘴喷淋液膜区换热过程的数值模拟

Numerical simulations on sheet region of spray cooling process of pressure-swirl nozzle

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