SIMULATION OF DETONATION INITIATION IN STRAIGHT AND BAFFLED CHANNELS

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FARSHCHI M.; HOSSAIN POUR S.

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Journal: SCIENTIA IRANICA Year:2004 | Volume:11 | Issue:1-2 Page(s): 37-49

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Title

SIMULATION OF DETONATION INITIATION IN STRAIGHT AND BAFFLED CHANNELS

Author(s)

FARSHCHI M. | HOSSAIN POUR S. | Issue Writer Certificate

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Abstract

Euler conservation equations, ideal gas state equations and simplified chemical kinetics models were used to simulate two-dimensional straight and baffled shock tubes. In a straight channel, detonation waves were initiated by a strong shock wave and allowed to travel down the channel to reach a CJ wave condition. It has been shown that a two-step reaction, kinetics model with an induction time delay, resulted in a physically plausible transient solution. The one-step kinetics model solution is only valid at the limit of a steady state CJ wave condition and should not be used for transient problems. The two-step kinetics model was then used to simulate a detonation initiation in a baffled shock tube. It was shown that the presence of multiple baffles in a channel could result in an initiation of detonation, in cases where the temperature jump across the traveling initial compression wave and the presence of a single baffle are not sufficient to initiate a detonation. Furthermore, it is shown that in the absence of any viscous mechanisms, shock reflection from the second baffle created a moving Mach stem between the baffles. The coalescence and focusing of pressure waves behind this Mach stem resulted in the creation of a hot spot leading to a detonation wave.

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APA: Copy

FARSHCHI, M., & HOSSAIN POUR, S.. (2004). SIMULATION OF DETONATION INITIATION IN STRAIGHT AND BAFFLED CHANNELS. SCIENTIA IRANICA, 11(1-2), 37-49. SID. https://sid.ir/paper/289247/en

Vancouver: Copy

FARSHCHI M., HOSSAIN POUR S.. SIMULATION OF DETONATION INITIATION IN STRAIGHT AND BAFFLED CHANNELS. SCIENTIA IRANICA[Internet]. 2004;11(1-2):37-49. Available from: https://sid.ir/paper/289247/en

IEEE: Copy

M. FARSHCHI, and S. HOSSAIN POUR, “SIMULATION OF DETONATION INITIATION IN STRAIGHT AND BAFFLED CHANNELS,” SCIENTIA IRANICA, vol. 11, no. 1-2, pp. 37–49, 2004, [Online]. Available: https://sid.ir/paper/289247/en

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