不同液滴破碎模型的验证及柴油机在燃气混合过程中的应用

齐文亮; 明平剑; 张文平; 彭晔

doi:10.13224/j.cnki.jasp.2018.09.006

不同液滴破碎模型的验证及柴油机在燃气混合过程中的应用

doi: 10.13224/j.cnki.jasp.2018.09.006

哈尔滨工程大学动力与能源工程学院,哈尔滨 150001

基金项目: 国家自然科学基金(51479038); 中央高校基本科研业务费专项资金(HEUCFP201711)

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出版历程
- 收稿日期: 2017-05-08
- 刊出日期: 2018-09-28

Evaluation of different breakup models and application to the mixture preparation process for diesel engines

摘要

摘要: 在射流不稳定性理论的基础上,将喷嘴内部的湍流流动以权重的形式加入初次破碎模型中；根据液滴的变形量采用TAB与KH-RT模型竞争的机制来计算液滴二次破碎；建立了Hybrid液滴破碎的数学模型。通过与实验数据、TAB和KH-RT破碎模型的计算结果对比,验证模型计算的准确性。Hybrid模型计算的液滴碰壁后飞溅半径和高度的最大相对误差分别为8%和6%,远小于其他两个模型的最大相对误差值。将验证过的三个破碎模型应用于柴油机中,比较了三个破碎模型对燃油分布的影响。研究发现,Hybrid模型的计算结果较比TAB和KH-RT模型准确度更高。
- 湍流流动 /
- Hybrid模型 /
- 液滴破碎 /
- 液滴碰壁 /
- 燃油分布
Abstract: On the basis of the theory of jet instability, the turbulent flow inside the nozzle was added into the primary breakup model in the form of weight coefficient.According to the value of deformation of the droplet, the TAB model and the KH-RT model were used to calculate the droplet breakup process by competition mechanism, and then the mathematical model of breakup. The accuracy of the model was verified by comparing the calculated results with the experimental data, TAB and KH-RT breakup model. The maximum relative errors of the Hybrid breakup model for the calculation of the radius and height after impingement were 8% and 6%, respectively, which were far less than the calculated values of the other two breakup models. The three breakup models were applied to the diesel engine, and the effects of these models on the fuel distribution were compared. The study found that the calculation result of the Hybrid breakup model was more accurate than the TAB and KH-RT model.
- turbulent flow /
- Hybrid model /
- droplet breakup /
- spray impingement /
- fuel distribution

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参考文献(19)

[1]	OROURKE P J,AMSDEN A A.The TAB method for numerical calculation of spray droplet breakup［R］.SAE Paper TP872089,1987.
[2]	TANNER F X.A cascade atomization and drop breakup model for the simulation of high-pressure liquid jets［R］.SAE Paper 2003-01-1044,2003.
[3]	REITZ R D.Modeling atomization processes in high-pressure vaporizing sprays［J］.Atomization and Spray,1987,3(4):309-337.
[4]	PATTERSON M A,REITZ R D.Modeling the effects of fuel spray characteristics on diesel engine combustion and emission［R］.SAE Paper 980131,1998.
[5]	SOM S.Development and validation of spray models for investigating diesel engine combustion and emissions［D］.Chicago:University of Illinois,2009.
[6]	雷国东.非结构网格FVM在复杂几何结构的湍流反应流计算中的应用研究［D］.哈尔滨：哈尔滨工程大学,2008.LEI Guodong.The application and research of the unstructured grid FVM in the turbulent reaction flows simulation with complex geometries［D］.Harbin:Harbin Engineering University,2008.(in Chinese)
[7]	明平剑.基于非结构化网格气液两相流数值方法及并行计算研究与软件开发［D］.哈尔滨：哈尔滨工程大学,2008.MING Pingjian.Development of numerical modeling for gas-liquid two-phase flows based on unstructured grids and parallel computing［D］.Harbin:Harbin Engineering University,2008.(in Chinese)
[8]	PAYRI R,MOLINA S,SALVADOR F J.A study of the relation between nozzle geometry,internal flow and sprays characteristics in diesel fuel injection sytems［J］.Journal of Mechanical Science and Technology,2004,18(7):1222-1235.
[9]	HE Z,ZHONG W,WANG Q.Effect of nozzle geometrical and dynamic factors on cavitating and turbulent flow in a diesel multi-hole injector nozzle［J］.International Journal of Thermal Sciences,2013,70(8):132-143.
[10]	HUH K Y,LEE E,KOO J Y.Diesel spray atomization model considering nozzle exit turbulence conditions［J］.Atomization and Sprays,1998,8(4):453-469.
[11]	LIU A B,MATHER D K,REITZ R D.Modeling the effects of drop drag and breakup on fuel sprays［R］.SAE Paper 930072,1993.
[12]	刘永丰,明平剑,张文平,等.一种固定网格上拉格朗日点追踪的快速算法［J］.计算物理,2010,27(4):527-532.LIU Yongfeng,MING Pingjian,ZHANG Wenping,et al.An efficient Lagrange point tracking algorithm for fixed grids［J］.Chinese Journal of Computational Physics,2010,27(4):527-532.(in Chinese)
[13]	NORDIN N.Complex chemistry modeling of diesel spray combustion［D］.Gteborg:Chalmers University of Technology,2001.
[14]	AMSDEN A A.KIVA-3V:a block-structured KIVA program for engines with vertical or canted valves［R］.Los Alamos National Laboratory,LA-13313-MS,1997.
[15]	ZHANG Y,JIA M,LIU H,et al.Development of a new spray/wall interaction model for diesel spray under PCCI-engine relevant conditions［J］.Atomization and Sprays,2014,24(1):41-80.
[16]	RAMIREZ A I,SOM S,AGGARWAL S K,et al.Quantitative measurement of diesel fuel spray characteristics in the near-nozzle region of a heavy duty multi-hole injector［R］.Orlando,FL:21st Annual Conference on Liquid Atomization and Spray Systems,2008.
[17]	WANG Y,LEE W G,REITZ R D.Numerical simulation of diesel sprays using an Eulerian-Lagrangian spray and atomi-zation (ELSA) model coupled with nozzle flow［R］.SAE Paper 2011-01-0386,2001.
[18]	PAYRI R,SALVADOR F J,GIMENO J,et al.Flow regime effects on non-cavitating injection nozzles over spray behavior［R］.International Journal of Heat & Fluid Flow,2011,32(1):273-284.
[19]	ALLOCCA L,ANDREASSI L,UBERTINI S.Evaluation of splash models with high-pressure diesel spray［R］.SAE Paper 2006-01-1117,2006.