Taking a side ported pre-mixed natural gas-fueled rotary engine converted from a gasoline rotary engine as the study object. On the basis of the Fluent simulation software, a three-dimensional dynamic simulation model is established by writing dynamic mesh programs and choosing the reasonable turbulent model, combustion model, CHEMKIN mechanism. The three-dimensional dynamic simulation model based on the chemical reaction kinetics is also validated by the experimental data. On this basis, the three-dimensional dynamic characteristics for flow, temperature field and the combustion intermediate product under different combustion chamber configuration are analyzed. The results show that when the rotor pocket is located at the front end of rotor surface along length direction and the center of the rotor surface along width direction, a tumble in the rear of combustion chamber and a high speed flow in the middle of combustion chamber are made full use to increase flame speed. The flame propagation speed reaches the maximum value. The indicator diagram is best and the production of OH is biggest. Comparing with mid pocket combustion chamber, the front pocket combustion chamber shows a 19.9 percent increase in the peak pressures, but NO emission mass fraction still stay within 0.5 percent.
FAN Baowei
,
PAN Jianfeng
,
HUANG Jun
,
XIAO Man
,
YAO Jiaqi
. Influence of Combustion Chamber Configuration on Combustion Process of Natural Gas-fueled Rotary Engines[J]. Journal of Mechanical Engineering, 2015
, 51(22)
: 141
-151
.
DOI: 10.3901/JME.2015.22.141
[1] 裴海灵，周乃君，高宏亮. 三角转子发动机的特点及其发展概况综述[J]. 内燃机，2006(6)：1-3.PEI Hailing，ZHOU Naijun，GAO Hongliang. The characteristics and improvement of rotary engines[J]. Internal Combustion Engines，2006(6)：1-3.
[2] 马凡华，江龙，丁尚芬，等. 稀燃天然气掺氢发动机循环变动的试验研究[J]. 机械工程学报，2010，46(6)：21-26.MA Fanhua，JIANG Long，DING Shangfen，et al. Experimental study on cycle-by-cycle variations in lean-burn natural gas engine with hydrogen enrichment[J]. Journal of Mechanical Engineering，2010，46(6)：21-26.
[3] 张欣，王玉君，李从心，等. 耦合 CFD 和详细化学动力学的CNG发动机工作过程多维数值模拟[J]. 机械工程学报，2009，45(11)：225-229.ZHANG Xin，WANG Yujun，LI Congxin，et al. Multi-dimensional numerical simulation of operating process of CNG engine using detailed chemical kinetics with CFD[J]. Journal of Mechanical Engineering，2009，45(11)：225-229.
[4] WU Jinjun，HAI Jingtao，SHI Jianzhong，et al. Strategy for diesel rotary engine with common rail injection system[J]. Chinese Journal of Mechanical Engineering，2006，19(3)：412-416.
[5] 石滨，郭林福，刘建华. 缸内直喷不同CH4/N2配比的混合燃料发动机掺氢燃烧负荷特性试验研究[J]. 机械工程学报，2014，50(20)：107-112.SHI Bin，GUO Linfu，LIU Jianhua. Experimental study of load characteristics of direct-injection engine fueled with various proportions of CH4 and N2-hydrogen blends[J]. Journal of Mechanical Engineering，2014，50(20)：107-112.
[6] HASEGAWA Y，YAMAGUCHI K. An Experimental investigation on air-fuel mixture formation inside a low-pressure direct injection stratified charge rotary engine[R]. SAE，930678，1993.
[7] ABRAHAM J，BRACCO F V. Comparisons of computed and measured pressure in a premixed-charge natural-gas-
fueled rotary engine[R]. SAE，890671，1989.
[8] ABRAHAM J，BRACCO F V. 3-D computation of premixed-charge natural gas combustion in rotary engines[R]. SAE，910625，1991.
[9] 李立君，尹泽勇，乔渭阳，等. 汽油转子发动机燃烧过程模拟技术研究[J]. 内燃机学报，2005，23(5)：457-461.LI Lijun，YIN Zeyong，QIAO Weiyang，et al. Study on mathematical combustion model for a gasoline rotary combustion engine[J]. Transactions of Csice，2005，23(5)：457-461.
[10] 周乃君，陈秋亮，裴海灵，等. 燃油喷射方向对转子发动机燃烧的影响[J]. 内燃机，2008(2)：16-18.ZHOU Naijun，CHEN Qiuliang，PEI Hailing，et al. Rotary combustion engine performance influenced by the direction of fuel injection[J]. Internal Combustion Engines，2008(2)：16-18.
[11] 范宝伟，潘剑锋，陈瑞，等. 点火提前角对天然气转子发动机燃烧过程的影响[J]. 兵工学报，2014，35(1)：1-8.FAN Baowei，PAN Jianfeng，CHEN Rui，et al. Effects of ignition position on combustion in rotary engine fueled with nature gas[J]. Chinese Internal Combustion Engine Engineering，2014，35(1)：1-8.
[12] YANG B，POPE S B. An investigation of the accuracy of manifold methods and splitting schemes in the computational implementation of combustion chemistry[J]. Combustion and Flame，1998，112(1-2)：16-32.
