Effects of ignition delay time on characteristic parameters of aluminum dust explosion

Tan Ru-mei; Zhang Qi; Zhang Bo

doi:10.11883/1001-1455(2014)01-0017-06

Volume 34 Issue 1

Mar. 2014

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Tan Ru-mei, Zhang Qi, Zhang Bo. Effects of ignition delay time on characteristic parameters of aluminum dust explosion[J]. Explosion And Shock Waves, 2014, 34(1): 17-22. doi: 10.11883/1001-1455(2014)01-0017-06

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Tan Ru-mei, Zhang Qi, Zhang Bo. Effects of ignition delay time on characteristic parameters of aluminum dust explosion[J]. Explosion And Shock Waves, 2014, 34(1): 17-22. doi: 10.11883/1001-1455(2014)01-0017-06

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Effects of ignition delay time on characteristic parameters of aluminum dust explosion

doi: 10.11883/1001-1455(2014)01-0017-06

Tan Ru-mei^{1, 2
,
,},
Zhang Qi²,
Zhang Bo²

1.
School of Environmental Resources and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
2.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

Funds: Supported by the National Natural Science Foundation of China (11072035)

Received Date: 2012-07-18
Rev Recd Date: 2012-12-27
Publish Date: 2014-01-25

Abstract

Abstract

According to the time effect of particle dispersion and sedimentation during the dust cloud formation, the paper points out that the internationally accepted method that only by the gas phase turbulence degrees or single dust concentration to set the fixed ignition delay time, is of uncertainty.To investigate the effects of the ignition delay time on the dust explosion pressure and the pressure rise rate, a series of explosion experiments were carried out in a 5－L cylindrical vessel filled with aluminum dust.The results show that the ignition delay time has a significant effect on the measured values of the explosion pressure and the pressure rise rate and there exists an optimum ignition delay time to maximize the explosion pressure.With the increasing of the dust concentration, the optimum ignition delay time increases gradually to the maximum and then remains unchanged.The maximum explosion pressure and the maximum pressure rise rate under the optimum ignition delay time are obviously higher than those under the fixed ignition delay time of 60ms.If the fixed ignition delay time of 60ms is used for all the aluminum dust with different concentrations, the measured maximum explosion pressure and the maximum pressure rise rate may largely deviate from the actual values.
- mechanics of explosion,
- ignition delay time,
- dust explosion setup,
- aluminum explosion,
- explosion pressure,
- maximum pressure rise rate

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References

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