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Title: Experimental investigation of turbulent flame propagation and pressure oscillation in a constant volume chamber equipped with an orifice plate
Authors: Wei, Haiqiao
Gao, Dongzhi
Zhou, Lei
Zhao, Jianfu
Chen, Rui
Keywords: Auto-ignition
Flame
Orificeplate
Pressure oscillation
Shock wave
Issue Date: 2017
Publisher: © Taylor & Francis
Citation: WEI, H. ... et al., 2017. Experimental investigation of turbulent flame propagation and pressure oscillation in a constant volume chamber equipped with an orifice plate. Combustion Science and Technology, http://dx.doi.org/10.1080/00102202.2017.1389910
Abstract: In this work, the main contribution is an understanding of different combustion phenomena involving flame acceleration, flame propagation, and the pressure oscillation resulting from flame-shock interactions. These physical phenomena were experimentally studied using a newly developed confined combustion chamber equipped with one or two orifice plates. The results showed that there are five stages of flame propagation when a laminar flame passes through the orifice plate in a confined space. These include the deceleration of the laminar flame, jet flame formation and rapid acceleration, deceleration of the flame, turbulent flame formation and acceleration, and turbulent flame propagation in the end-gas region. Flame acceleration and pressure oscillation were found to be strongly related to the aperture size of the orifice plate. The high amplitudes of pressure oscillations were found to be the results of two combustion mechanisms: the end gas auto-ignition and the interactions between the accelerated turbulent flame and shock wave. To further accelerate the flame and promote stronger disturbance in the end gas, another identical orifice plate was employed. Subsequently, strong flame-shock interaction caused end-gas auto-ignition with an extremely high-amplitude pressure oscillation. Eventually, the maximum amplitude of pressure oscillation exceeded 8 MPa as end-gas auto-ignition occurred in the end region of the combustion chamber.
Description: Closed access until 9 October 2018. This article was published in the journal Combustion Science and Technology [© Taylor & Francis] and the definitive version is available at: http://dx.doi.org/10.1080/00102202.2017.1389910
Sponsor: This work was supported by the National Natural Science Foundation of China (Grant Nos.51476114, 91641203, and 51606133).
Version: Accepted for publication
DOI: 10.1080/00102202.2017.1389910
URI: https://dspace.lboro.ac.uk/2134/27468
Publisher Link: https://doi.org/10.1080/00102202.2017.1389910
ISSN: 0010-2202
Appears in Collections:Closed Access (Aeronautical and Automotive Engineering)

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