Effect of ignition locations on vented explosion of premixed hydrogen-air mixtures

Cao Yong; Guo Jin; Hu Kunlun; Shao Ke; Yang Fan

doi:10.11883/1001-1455(2016)06-0847-06

Volume 36 Issue 6

Oct. 2018

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Cao Yong, Guo Jin, Hu Kunlun, Shao Ke, Yang Fan. Effect of ignition locations on vented explosion of premixed hydrogen-air mixtures[J]. Explosion And Shock Waves, 2016, 36(6): 847-852. doi: 10.11883/1001-1455(2016)06-0847-06

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Cao Yong, Guo Jin, Hu Kunlun, Shao Ke, Yang Fan. Effect of ignition locations on vented explosion of premixed hydrogen-air mixtures[J]. Explosion And Shock Waves, 2016, 36(6): 847-852. doi: 10.11883/1001-1455(2016)06-0847-06

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Effect of ignition locations on vented explosion of premixed hydrogen-air mixtures

doi: 10.11883/1001-1455(2016)06-0847-06

Anhui University of Science and Technology, Huainan 232001, Anhui, China

Received Date: 2015-03-19
Rev Recd Date: 2015-06-10
Publish Date: 2016-11-25

Abstract

Abstract

In this work experiments were carried out to investigate the effect of ignition locations and vent burst pressures on the pressure profile and the flame propagation during explosion venting of hydrogen-air mixtures. The results indicate that, in all the cases, the central ignition leads to the largest flame areas, the highest flame propagation velocities and peak pressures peak pressures; compared with that of the central ignition, the effect of the rear ignition on the flame propagation velocity, the flame areas and the peak pressures is reduced, while the front ignition results in the smallest flame areas, the lowest flame propagation velocity and peak pressures. For the front ignition, the pressure profile exhibits three peak pressures which correspond to the following three successive stages, but for the central and rear ignition, only the first and the third peak pressure can be found. Furthermore, both the peak pressures and the flame areas increase with the bursting pressure. Overpressure measurements made inside the chamber show clearly that the acoustic oscillation occurs and the internal pressures were influenced by the external explosion.
- mechanics of explosion,
- vented explosion,
- burst pressure,
- igniter locations,
- hydrogen

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References(13)

References

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