Numerical Study of Fuel Droplet Evaporation Process by Using VOF Model

doi:10.3969/j.issn.1000-1093.2013.11.003

Abstract

Abstract: A large eddy simulation VOF model is established for the fuel droplet evaporation. The heat and mass transfer characteristics of fuel droplet evaporation in forced convection flow field are investigated. The trend of droplet evaporation is researched by comparing and analyzing the results of heat and mass transfers. The results show that the heat transfer of droplet is not uniformly, but the hot zone is rapidly heated while other zone is slowly heated in the process of droplet evaporation. At the initial time, since the concentration gradient of the fuel droplet at the interface between the vapor and the surrounding gas is high, the initial evaporation rate is rapid and Sh number is larger. Different temperature difference can promote the evaporation process of the droplets. The evaporation rate increases with the increase of the temperature difference.

Key words: fluid mechanics, gasliquid twophase flow, VOF model, droplet evaporation, heat and mass transfer

CLC Number:

TK421

ZHAO Peng， LI Guo-xiu， ZHANG Tao， JIA Tao-ming. Numerical Study of Fuel Droplet Evaporation Process by Using VOF Model[J]. Acta Armamentarii, 2013, 34(11): 1359-1365.

References

［1］ Wu J S, Liu Y J, Sheen H J. Effects of ambient turbulence and fuel properties on the evaporation rate of single droplets [J]. International Journal of Heat and Mass Transfer, 2001, 44(24): 4593-4603. [2］ Birouk M, Gokalp I. Current status of droplet evaporation in turbulent flows [J]. Progress in Energy and Combustion Science, 2006, 32(4): 408-423. ［3］ You G D, Xu C L, Xu J F, et al. Application of space-time conservation element and solution element method in intake and exhaust flows of high power density diesel engine［J］. Defence Technology,2013,9(3):171-175. [4］ Horgue P, Augier F, Quintard M, et al. A suitable parametrization to simulate slug flows with the volume-of-fluid method[J]. Comptes Rendus Mécanique, 2012, 340(6): 411-419. [5］ Ling L, Yong C C, Yu L L. Volume of fluid (VOF) method for curved free surface water flow in shallow open channel[C]∥Proceedings of the Congress-International Association for Hydraulic Redearch Hydraulics of Rivers. Vol Ii, Theme D: Water Works and Machinery, 2001: 244-250. [6］ Li X W, Fan J F. A stencil-like volume of fluid (VOF) method for tracking free interface [J]. Appl Math Mech-Engl, 2008, 29(7): 881-888. [7］ Troch P, Li T, De Rouck J, et al. Wave interaction with a sea dike using a VOF finite-volume method[C]∥Proceedings of the 13th International Offshore and Polar Engineering Conference. Honolulu: The International Society of Offshore and Poller Engineering, 2003: 325-332. [8］ Rabha S S, Buwa V V. Volume-of-fluid (VOF) simulations of rise of single/multiple bubbles in sheared liquids[J]. Chemical Engineering Science, 2010, 65(1): 527-537. [9］ Schlottke J, Dulger E, Weigand B. A VOF-based 3D numerical investigation of evaporating, deformed droplets [J]. Progress in Computational Fluid Dynamics, 2009, 9(6): 426-435. [10］ Schlottke J, Weigand B. Direct numerical simulation of evaporating droplets [J]. Journal of Computational Physics, 2008, 227(10): 5215-5237. [11］ Faeth G M, Lazar R S. Fuel droplet burning rates in a combustion gas environment[J]. AIAA Journal, 1971, 9(11): 2165-2171.

[1]	DONG Xiang-rui， CHEN Yao-hui， DONG Gang， LIU Yi-xin. Research on Control of Hypersonic Shock Wave/boundary Layer Interactions by Double Micro-ramps [J]. Acta Armamentarii, 2016, 37(9): 1624-1632.
[2]	SUN Zhao， CAO Wei， WANG Cong， WEI Ying-jie. Effect of Surface Wettability on Cavitation of Sphere during Its Water Entry [J]. Acta Armamentarii, 2016, 37(4): 670-676.
[3]	SONG Bao-wei, ZHANG Bao-shou, JIANG Jun, DU Xiao-xu, WANG De-zheng. Estimation of Equation of Motion of Four-rotor Dish-shaped AUV and Simulation Research on Its Hydrodynamic Characteristics [J]. Acta Armamentarii, 2016, 37(2): 299-306.
[4]	ZHANG Xiao-shi， WANG Cong， WEI Ying-jie， SUN Tie-zhi. Research on Collapse Characteristics of Ventilated Cavities around an Underwater Vehicle [J]. Acta Armamentarii, 2016, 37(12): 2324-2330.
[5]	ZHANG Qun-feng，YAN Pan-pan，LI Jun. Elaborate Simulation of Interaction Effect between Internal Weapon Bay and Missile [J]. Acta Armamentarii, 2016, 37(12): 2366-2376.
[6]	TANG Jian-hua，QIAN Lin-fang，XU Ya-dong. Fluid-structure Interaction Modelling of Airdrop Cargo Platform Swinging [J]. Acta Armamentarii, 2016, 37(1): 141-148.
[7]	CHEN Xin, ZHANG Qiang, HE Li-ming, WANG Yu-qian, RONG Kang. Numerical Research on the Effect of Incident Shock Strength on Focusing of Shock Wave in a Parabolic Cavity [J]. Acta Armamentarii, 2015, 36(4): 631-636.
[8]	SUN Ze-gang, XIAO Shi-de, WANG De-hua, XU Ming-heng. Cavitation Flow Simulation and Structural Optimization of Hydraulic Spool Valve V-throttle Groove [J]. Acta Armamentarii, 2015, 36(2): 345-354.
[9]	MA Qing-peng, WEI Ying-jie, WANG Cong, CAO Wei, CHEN Chao-qian. Numerical Simulation of Deep Closure of High-speed Water Entry Cavity of Cone-cylinder [J]. Acta Armamentarii, 2014, 35(9): 1451-1457.
[10]	QIU Hai-qiang， YUAN Xu-long， WANG Ya-dong， LIU Chuan-long. Research on the Law of Development of Outlet Cavity During the Launch of Submarine Launched Missile [J]. Acta Armamentarii, 2014, 35(9): 1510-1514.
[11]	ZHANG Qun-feng， YAN Pan-pan, SHAN Jian-ping, HE Wan-fa. Numerical Simulation of Inlet and Outlet Pressures Influencing Internal flow of a Vane Pump [J]. Acta Armamentarii, 2014, 35(8): 1223-1229.
[12]	MAO Zhao-yong, WEI Chao, HUANG Wei-chao, FAN Yu. Influence of Deflector Baffle on Performance of Banki Wind Turbine [J]. Acta Armamentarii, 2014, 35(8): 1324-1328.
[13]	LI Fu-yuan， ZHANG Yu-wen， DANG Jian-jun， TENG Peng-hua. Research on Hydrodynamic Characteristics of Conical Cavitator [J]. Acta Armamentarii, 2014, 35(7): 1040-1044.
[14]	DUAN Lei, WANG Guo-yu, FU Xi-neng. Research on the Unsteady Characteristics of Ventilated Cavitating Flows in the Form of Gas-leakage by Toroidal Vortex [J]. Acta Armamentarii, 2014, 35(5): 711-718.
[15]	JIANG Yu-ying， GONG Lie-hang， XU Xin-lin， WANG You-cheng. Numerical Simulation of Flow Field in Abrasive Water Jet Nozzles [J]. Acta Armamentarii, 2014, 35(4): 461-467.