Journal of Jilin University(Engineering and Technology Edition) ›› 2019, Vol. 49 ›› Issue (6): 1929-1935.doi: 10.13229/j.cnki.jdxbgxb20190548

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Effects of single and dual ignition on combustion characteristics of natural gas under different equivalence ratios

Chang-qing SONG1(),Wen-miao CHEN2,Jun LI1,Da-wei QU1(),Hao CUI1   

  1. 1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
    2. New Science and Technology Research Institute, Weichai Power Co. , Ltd. , Weifang 261000, China
  • Received:2019-05-29 Online:2019-11-01 Published:2019-11-08
  • Contact: Da-wei QU E-mail:sochaqing@163.com;eewang404@163.com

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Abstract:

Aiming at the problems of slow combustion speed, high exhaust temperature, high heat load and prone to knock for natural gas engine with large cylinder bore, a visual constant volume combustion system suitable for dual-spark plug ignition is designed in this paper. Combining the rapid combustion technology and the natural flame luminescence method, the visualization experiment of natural gas combustion was carried out on a constant volume combustion bomb by changing the fuel-air equivalence ratio. The images of dynamic combustion process in cylinder were collected by high-speed camera，the effects of single and dual-spark plug ignition on flame propagation, combustion pressure in cylinder and combustion duration were studied by using the digital image processing technology of MATLAB. The results show that under different equivalence ratios, compared with single ignition, the dual ignition can shorten the flame propagation distance, accelerate the combustion speed in cylinder, shorten the flame development period and the main combustion period, and thus improve the thermal efficiency of combustion. Especially for the lean combustion of natural gas, the effect is very obvious, which can restrain the occurrence of misfire and knock, broaden the lean combustion limit, and is conducive to combustion stability and emission reduction.

Key words: power machinery and engineering, dual-spark plug, natural gas, fixed volume combustion bomb, combustion characteristic

CLC Number: 

  • TK46

Fig.1

Structure diagram of constant volume bomb"

Fig.2

Test system chart and test stages"

Fig.3

Debugging of ignition waveform"

Table 1

Natural gas fuel components"

成分 Vol/% 成分 Vol/%
CH4 91.87 C5H12 0.30
C2H6 2.53 C6H14 0.18
C3H8 1.24 N2 2.98
C4H10 0.77 O2 0.13

Fig.4

Image of noise frequency domain"

Fig.5

Processing of noise reduction and filtering"

Fig.6

Images of flame propagation when equiv alent ratio is 0.8"

Fig.7

Cylinder pressure comparison of single and doublespark plugs when equivalent ratio is 0.8"

Table 2

Peak pressure and related moment when equivalent ratio is 0.8"

点火方式 峰值压力/MPa 对应时刻/ms 火焰发展期/ms 主燃期/ms
单点火 3.27 126.8 38 74
双点火 3.48 101.2 35 50

Fig.8

Images of flame propagation when equiv alent ratio is 1.0"

Fig.9

Cylinder pressure comparison of single and doublespark plugs when the equivalent ratio is 1.0"

Table 3

Peak pressure and related moment when equivalent ratio is 1.0"

点火方式 峰值压力/MPa 对应时刻/ms 火焰发展期/ms 主燃期/ms
单点火 3.57 81.1 32.0 36
双点火 3.76 77.2 32.6 30

Fig.10

Images of flame propagation when equivalent ratio is 1.2"

Fig.11

Cylinder pressure comparison of single and double spark plugs when equivalent ratio is 1.2"

Table 4

Peak pressure and related moment when equivalent ratio is 1.2"

点火方式 峰值压力/MPa 对应时刻/ms 火焰发展期/ms 主燃期/ms
单点火 3.05 111.2 45.0 54.6
双点火 3.25 105.6 38.8 44.2
1 陈昊，韩斌, 陈轶嵩,等 . 天然气汽车发展现状及趋势[J].中国能源，2018, 40(2): 36-41.
1 Chen Hao , Han Bin , Chen Yi-song , et al . Development status and trend of natural gas vehicles[J]. Energy of China, 2018, 40(2): 36-41.
2 蒋德明 . 内燃机燃烧与排放学[M]. 西安：西安交通大学出版社，2001.
3 李伟峰, 刘忠长, 王忠恕, 等 . N2和CO2稀释对天然气发动机燃烧和NO x 排放的影响[J]. 吉林大学学报：工学版, 2015, 45(4): 1115-1123.
3 Li Wei-feng , Liu Zhong-chang , Wang Zhong-shu , et al . Effects of N2 and CO2 dilution on the combustion and NO x emissions of natural gas engines[J]. Journal of Jilin University(Engineering and Technology Edition), 2015, 45(4): 1115-1123.
4 秦静, 徐鹤, 裴毅强, 等 . 初始温度和初始压力对甲烷-甲醇裂解气预混层流燃烧特性的影响[J]. 吉林大学学报：工学版, 2018, 48(5): 1475-1482.
4 Qin Jing , Xu He , Pei Yi-qiang , et al . Influence of initial temperature and initial pressure on premixed laminar burning characteristics of methane-dissociated methanol flames[J]. Journal of Jilin University(Engineering and Technology Edition), 2018, 48(5): 1475-1482.
5 Li Y , Zhao H , Leach B , et al . Optimisation of in-cylinder flow for fuel stratification in a three-valve twin-spark-plug SI engine[J]. SAE Paper, 2003-01-0635.
6 Ramtilak A , Joseph A , Sivakumar G , et al . Digital twin spark ignition for fuel economy and emissions on four stroke engines[J]. SAE Paper, 2005-26-008.
7 Kakaee A H , Paykani A , Ghajar M . The influence of fuel composition on the combustion and emission characteristics of natural gas fueled engines[J]. Renewable and Sustainable Energy Reviews, 2014, 38: 64-78.
8 Alt?n I , Bilgin A . Quasi-dimensional modeling of a fast-burn combustion dual-plug spark-ignition engine with complex combustion chamber geometries[J]. Applied Thermal Engineering, 2015, 87: 678-687.
9 Economides Michael J , Wood David-A . The state of natural gas[J]. Journal of Natural Gas Science and Engineering, 2009, 1(1): 1-13.
10 Manivannan A , Tamil Porai P , Chandrasekan S , et al . Lean burn natural gas spark ignition engine-An overview[J]. SAE Paper, 2003-01-0638.
11 Wang X , Zhang H G , Yao B F , et al . Experimental study on factors affecting lean combustion limit of SI engine fueled with compressed natural gas and hydrogen blends[J]. Energy, 2012, 38(1): 58-65.
12 Asok K S , Zheng J J , Huang Z H . Dynamics of cycle-to-cycle variations in a natural gas direct-injection spark-ignition engine[J]. Applied Energy, 2011, 88: 2324-2334.
13 Ma L , Geng J , Li W , et al . The development of natural gas as an automotive fuel in China[J]. Energy Policy, 2013, 62: 531-539.
14 崔昊 . 双火花塞对天然气定容燃烧影响的试验研究[D].长春：吉林大学汽车工程学院, 2016.
14 Cui Hao . Experimental study on the effect of the dual spark plug on the constant volume combustion of nature gas[D].Changchun:College of Automotive Engineering,Jilin University, 2016.
15 Li Guo-xiu , Yao Bao-feng . Nonlinear dynamics of cycle-to-cycle combustion variations in a lean burn natural gas engine[J]. Appl Therm Eng, 2008, 28: 611-620.
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