Simulation Study of Oxy-Fuel Combustion Process and Effect of Direct Water Injection in a Diesel Engine

doi:10.11908/j.issn.0253-374x.19151

Home > Archive>Volume 48, Issue 01, 2020 >87-94. DOI:10.11908/j.issn.0253-374x.19151

Simulation Study of Oxy-Fuel Combustion Process and Effect of Direct Water Injection in a Diesel Engine
DOI:
                        10.11908/j.issn.0253-374x.19151
                    
CSTR:
                        [cstr]
                    
Author:
                        KANG ZheKANG Zhe
School of Automotive Engineering, Chongqing University, Chongqing 400044, China；State Key Laboratory of Mechanical Transmission,Chongqing 400044,China
Find this author on All Journals
Find this author on BaiDu
Search for this author on this site
CHEN SiyuanCHEN Siyuan
Department of Technical Quality, SAIC Volkswagen Powertrain Co., Ltd., Shanghai 201807, China;School of Automotive Studies, Tongji University, Shanghai 201804, China
Find this author on All Journals
Find this author on BaiDu
Search for this author on this site
DENG JunDENG Jun
School of Automotive Studies, Tongji University, Shanghai 201804, China
Find this author on All Journals
Find this author on BaiDu
Search for this author on this site
WU ZhijunWU Zhijun
School of Automotive Studies, Tongji University, Shanghai 201804, China
Find this author on All Journals
Find this author on BaiDu
Search for this author on this site

                    
Affiliation:
Clc Number:TK422
Fund Project:

Article

Figures

Metrics

Reference [22]

Related [20]

Cited by

Materials

Comments

Abstract:

In this paper, a CFD model coupled with detailed chemical mechanism is established based on a common rail diesel engine test platform, the effect of oxygen concentration on diesel engine combustion process is investigated, and the enhancement in thermal efficiency with direct water injection is verified. The calculation results indicate that the in-cylinder specific heat ratio can be improved by increasing oxygen concentration, which results in an elevated in-cylinder pressure and temperature during compression stroke, promotes in-cylinder combustion reactions, enhances in-cylinder turbulence kinetics, and results in an advanced combustion phase. By injecting 160°C high temperature and high pressure water at 5°CA ATDC, the in-cylinder combustion process can be optimized. The injected water absorbs combustion heat and evaporates into steam which further propels the piston during expansion stroke, thus increasing the overall thermal efficiency of the diesel engine by about 3.75%.

Key words:internal combustion Rankine cycle; oxy-fuel combustion; simulation study; direct water injection

Reference

[1] 中国汽车工业协会. 2018年全年汽车产销数据[EB/OL]. http://www.caam.org.cn/.China Association of Automobile Manufactures. Global Automotive Product and Sale Statistics [EB/OL]. http://www.caam.org.cn/.

[2] 中国汽车工程学会. 节能与新能源汽车技术路线图[M]. 北京: 机械工业出版社, 2017.Society of Automotive Engineers-China. Road Map of Energy Conservation and New Energy Vehicle Technology [M]. Beijing: China Machine Press, 2017.

[3] Bilger, R W. Zero Release Combustion Technologies and the Oxygen Economy[C].Fifth International Conference on Technologies and Combustion for a Clean Environment, Lisbon, Portugal, Jul. 12–15, 1999, pp. 1039–1046.

[4] Robert W. Bilger, Zhijun Wu. Carbon Capture for Automobiles Using Internal Combustion Rankine Cycle Engines [J]. Journal of Engineering for Gas Turbines and Power, 2009, 131/034502.

[5] Wu Z, Fu L, Gao Y, et al. Thermal efficiency boundary analysis of an internal combustion Rankine cycle engine [J]. Energy, 2016, 94: 38-49.

[6] 吴志军,于潇. 基于内燃兰金循环的二氧化碳回收车用动力系统[J]. 吉林大学学报(工学版), 2010, (05):1199-1202.Wu Z, Yu X. CO2 capture automotive engine system based on internal combustion ranking cycle [J]. Journal of Jilin University (Engineering and Technology Edition), 2010,(05):1199-1202.

[7] John E. Dec and Christoph Espey. Chemiluminescence imaging of auto ignition in a DI diesel engine [C]. SAE Technical Paper 982685, 1998

[8] Patirck F. Flynn, Russel P. Durant, John E. Dec,et al. Diesel combustion: an integrated view combing laser diagnostics, chemical kinetics and empirical validation [C]. SAE Technical Paper 1999-01-0509, 1999.

[9] Yu X, Wu Z, Fu L, et al. Study of Combustion Characteristics of a Quasi Internal Combustion Rankine Cycle Engine [C]. SAE Technical Paper 2013-01-2698, 2013.

[10] Kang Z, Chen S, Wu Z, et al. Simulation Study of Water Injection Strategy in Improving Cycle Efficiency Based on a Novel Compression Ignition Oxy-Fuel Combustion Engine [J]. SAE International Journal of Engines, 2018, 11(2018-01-0894): 935-945.

[11] Hoppe F, Thewes M, Baumgarten H, et al. Water injection for gasoline engines: Potentials, challenges, and solutions [J]. International Journal of Engine Research, 2016, 17(1): 86-96

[12] Kang Z, Wu Z, Zhang Z, et al. Study of the combustion characteristics of a HCCI engine coupled with oxy-fuel combustion mode [J]. SAE International Journal of Engines, 2017, 10(3): 908-916.

[13] Zhi-jun Wu, Xiao Yu, Fu Le-zhong, et al. A high efficiency Oxy-fuel internal combustion engine cycle with water direct injection for waste heat recovery. Energy, 2014, 70: 110-120.

[14] 康哲,付乐中,邓俊,吴志军.内燃兰金循环发动机爆震控制试验[J].同济大学学报(自然科学版),2017,45(07):1030-1036.Zhe Kang, Lezhong Fu, Jun Deng, et al. Experimental Study of Knock Control in an Internal Combustion Rankine Cycle Engine [J]. Journal of Tongji University (Natural Science), 2017, 45(07): 1030-1036.

[15] 赵天朋, 刘永峰, 何旭, 等. 柴油在O₂/CO₂氛围下燃烧特性模拟和试验[J]. 内燃机学报,2017, 35(5): 415-422.Zhao Tianpeng, Liu Yongfeng, He Xu, et al. Simulation and Experiment of Auto-Ignition Characteristics for Diesel Fuel in O₂/CO₂ Atmosphere [J]. Transaction of CSICE, 2017, 35(5): 415-422.

[16] Zeuch Thomas , Moréac Gladys , Syed Sayeed Ahmed, Mauss Fabian . A Comprehensive Skeletal Mechanism For the Oxidation of n-Heptane Generated by Chemistry-guided Reduction [J]. Combustion and Flame, 2008, 155(4), Pages 651-674.

[17] Wu Z, Kang Z, Deng J, et al. Effect of oxygen content on n-heptane auto-ignition characteristics in a HCCI engine [J]. Applied energy, 2016, 184: 594-604.

[18] 刘永长. 内燃机热力过程模拟[M]. 北京:机械工业出版社, 2001.Liu Yongchang. Simulation of the Thermal Process within Internal Combustion Engine [M], 2001.

[19] 史绍熙, 刘书亮, 李康. 内燃机缸内空气运动的三维数值模拟[J]. 内燃机学报, 1993(11):192-196.Shi Shaoxi, Liu Shuliang, Li Kang. Three Dimensional Modeling of In-cylinder Air Motion in I.C. Engines [J]. Transaction of CSICE, 1993(11):192-196.

[20] 于潇,付乐中,邓俊,胡宗杰,吴志军. 喷水温度对内燃兰金循环燃烧过程影响的试验研究[J]. 工程热物理学报,2014, (01): 200-203.Yu X, Fu L, Deng J, et al. Experimental Study of the Effect of Water Injection Temperature on the Combustion Process of ICRC Cycle [J]. Journal of Engineering Thermophysics, 2014, (01): 200-203.

[21] Wu Z, Yu X, Fu L, et al. Experimental study of the effect of water injection on the cycle performance of an internal-combustion Rankine cycle engine [J]. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2014, 228(5): 580-588.

[22] Kang Z, Chen S, Wu Z, et al. Simulation Study of Water Injection Strategy in Improving Cycle Efficiency Based on a Novel Compression Ignition Oxy-Fuel Combustion Engine [J]. SAE International Journal of Engines, 2018, 11(2018-01-0894): 935-945.

Get Citation

KANG Zhe, CHEN Siyuan, DENG Jun, WU Zhijun. Simulation Study of Oxy-Fuel Combustion Process and Effect of Direct Water Injection in a Diesel Engine[J].同济大学学报(自然科学版),2020,48(01):87~94

Copy

Article Metrics

Abstract:
PDF:
HTML:
Cited by:

History

Received:April 19,2019
Revised:October 22,2019
Adopted:June 24,2019
Online: January 20,2020
Published:

Get Citation

Share

Article Metrics

History

Article QR Code