Numerical Study on Shock Wave Propagation with Obstacles during Methane Explosion

Zhi Ming Qu

doi:10.4028/www.scientific.net/AMM.33.114

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 33Numerical Study on Shock Wave Propagation with...

Numerical Study on Shock Wave Propagation with Obstacles during Methane Explosion

Abstract:

During shock wave propagation in the pipeline, the flow field of speed, pressure and temperature is evenly distributed. If there are obstacles, then the flow will be changed while the velocity gradient is formed near the obstacles. Passing through the obstacles, a high-speed gradient of the unburned methane mixture flow is established. While reaching the obstacle, the shock wave surface is rapidly stretched to increase the significant transmission speed. Propagating in the gradient field, the shock wave will be stretched and folded. The deformation of shock wave causes consumption of fuel and oxygen in greater unburned methane surface, which results in heat release rate increasing and faster shock propagation. In conclusion, shock wave causes larger advection speed in front of the unburned methane mixture, increasing flow velocity gradient further and leading to more intense shock wave propagation.

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Periodical:

Applied Mechanics and Materials (Volume 33)

Pages:

114-118

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.33.114

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Online since:

October 2010

Authors:

Zhi Ming Qu

Keywords:

Methane Explosion, Obstacle, Propagation, Shock Wave

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References

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