Experimental study of methane explosion suppression by nitrogen twin-fluid water mist

Yu Minggao; Yang Yong; Pei Bei; Niu Pan; Zhu Xinna

doi:10.11883/1001-1455(2017)02-0194-07

Volume 37 Issue 2

Mar. 2017

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Yu Minggao, Yang Yong, Pei Bei, Niu Pan, Zhu Xinna. Experimental study of methane explosion suppression by nitrogen twin-fluid water mist[J]. Explosion And Shock Waves, 2017, 37(2): 194-200. doi: 10.11883/1001-1455(2017)02-0194-07

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Experimental study of methane explosion suppression by nitrogen twin-fluid water mist

doi: 10.11883/1001-1455(2017)02-0194-07

Yu Minggao^{1, 2},
Yang Yong^{1, 2},
Pei Bei^{1, 2
,
,},
Niu Pan^{1, 2},
Zhu Xinna^{1, 2}

1.
School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China
2.
State Key Laboratory of Cultivation Bases Gas Geology and Gas Control, Jiaozuo 454003, Henan, China

Received Date: 2015-08-14
Rev Recd Date: 2015-11-03
Publish Date: 2017-03-25

Abstract

Abstract

In this work, to obtain a water mist with a finer particle size under lower pressures, reduce the running costs of the explosion-suppressing spray system, and improve its efficiency and applicability, we designed a transparent organic glass pipeline (120 mm×120 mm×840 mm) as the experimental platform for gas explosion. Then N₂ and fine water mist was pressed into the pipeline using a twin-fluid nozzle and experimental study of methane explosion suppression by nitrogen twin-fluid water mist was carried out adjusting the spray pressure and spray time and the explosion-suppression effectiveness of the twin-fluid water mist was investigated via analysis of the flame speed and the gas explosion overpressure. The results show that this twin-fluid water mist has a high explosion-suppressing efficiency, capable of reducing the damage degree of gas explosion. With the extension of the spray time, the peak value of the explosion flame speed, the peak overpressure and the average pressure rise rate decreased gradually. When the pressure of N₂ was 0.4 MPa and the spray time was 3 s, the peak value of the velocity decreased by 60.39%, and the peak overpressure decreased by 37.76%.
- twin-fluid,
- nitrogen,
- fine water mist,
- gas explosion

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References(24)

References

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