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Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2015, Vol. 16 Issue (10): 830-838    DOI: 10.1631/jzus.A1500039
Energy Engineering     
Characterization of gasoline combustion with laser and spark ignition
Cang-su Xu, Dong-hua Fang, Qi-yuan Luo, Jian Ma, Yang Xie, Xu Zheng
College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
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Abstract  The combustion of gasoline-air mixtures in a constant-volume combustion chamber with an initial condition of 0.1 MPa pressure and 363 K temperature is experimentally investigated with laser ignition generated by a Q-switched Nd:YAG laser (wavelengths of 532 and 1064 nm). Spark ignition is also tested, and the results are used as the benchmark. Combustion chamber pressure is measured by a piezoelectric pressure transducer, and recorded using a digital oscilloscope. When the equivalence ratio is swept from 1.2 to 1.8, laser and spark ignition show marginal differences in pressure rise rate and peak pressure. The maximum pressure rise rate and the maximum peak pressure are obtained at equivalence ratios of 1.6 and 1.8 for laser ignition and spark ignition, which are 39.4 MPa/μs and 0.68 MPa for the laser wavelength of 532 nm, 38.8 MPa/μs and 0.67 MPa for the laser wavelength of 1064 nm, and 38.1 MPa/μs and 0.67 MPa for spark ignition, respectively. When the equivalence ratio is reduced below 1.2, the pressure rise rate and peak pressure of the laser ignition are significantly higher than those of spark ignition, and the lean limit for laser ignition is also wider than that of spark ignition; therefore, laser ignition is more favorable for lean combustion. For both the laser and spark ignitions, the ignition energy demonstrated a limited impact on both the pressure rise rate and peak pressure. Heat release rate in the combustion chamber is calculated, and the results show that variations of heat release are in accordance with variations of the pressure history.

Key wordsLaser ignition      Spark ignition      Pressure rise rate      Peak pressure      Heat release rate     
Received: 02 March 2015      Published: 01 October 2015
CLC:  TK413.9  
Cite this article:

Cang-su Xu, Dong-hua Fang, Qi-yuan Luo, Jian Ma, Yang Xie, Xu Zheng. Characterization of gasoline combustion with laser and spark ignition. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2015, 16(10): 830-838.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A1500039     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2015/V16/I10/830

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