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Volume 34 Issue 4
Jul 2020
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Chinese Journal of High Pressure Physics  > 2020  >  34(4): 045201.
LI Yuyan, JIANG Rongpei, LI Zhipeng, XU Sen, PAN Feng, XIE Lifeng. Detonation and Quenching Characteristics of Premixed C2H4/N2O[J]. Chinese Journal of High Pressure Physics, 2020, 34(4): 045201. doi: 10.11858/gywlxb.20190845
Citation: LI Yuyan, JIANG Rongpei, LI Zhipeng, XU Sen, PAN Feng, XIE Lifeng. Detonation and Quenching Characteristics of Premixed C2H4/N2O[J]. Chinese Journal of High Pressure Physics, 2020, 34(4): 045201. doi: 10.11858/gywlxb.20190845
shu

Detonation and Quenching Characteristics of Premixed C2H4/N2O

doi: 10.11858/gywlxb.20190845
  • 1.

    School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

  • 2.

    National Quality Supervision and Inspection Center for Industrial Explosive Materials, Nanjing 210094, Jiangsu, China

  • 3.

    Beijing Institute of Aerospace Testing Technology, Beijing 100074, China

  • Received Date: 17 Dec 2019
  • Rev Recd Date: 05 Jan 2020
    Abstract
  • The detonation and the flame quenching properties of premixed gas C2H4/N2O in the combustion channels were studied experimentally using a self-developed flame propagation experiment. The results show that the premixed gas achieves the transition from deflagration to detonation in all the PMMA channels with the diameters of 5 mm, 10 mm and 15 mm, and the flame speed and acceleration rate decreased gradually with the increase of the channel diameter. 2.4% CO2 (mass fraction) diluent flame undergoes a process of stable combustion at the initial stage. The steady detonation speed and pressure are 2 207 m/s and 3.92 MPa, respectively, which are consistent with the theoretical values. The critical quenching diameter is 0.5–0.7 mm. The higher the propagation speed of the flame, the larger the channel diameter, the more difficult the flame quenching. According to the relationship between quenching diameter, turbulent flame velocity and quenching distance, the length of the flame arresters passageway length is calculated, which provides a reference for designing flashback arresters.

     

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