Effects of diluents on the ignition of premixed H2/air at micro-gravity conditions

Wei Kuo Zhang; Zheng Chen; Wen Jun Kong

Effects of diluents on the ignition of premixed H₂/air at micro-gravity conditions

Wei Kuo Zhang^*
, Zheng Chen
, Wen Jun Kong

^*Corresponding author for this work

Peking University
CAS - Institute of Engineering Thermophysics

Research output: Contribution to journal › Article › peer-review

Abstract

A computational study was performed to investigate the effects of diluents (He, Ar, or CO₂) on the ignition of premixed H₂/air mixtures. The objective of this study was to assess and explain the change of the minimum ignition energies (MIE) with the dilution ratio. It was found that, at the same dilution ratio, the MIE of He dilution was always higher than that of Ar dilution. The MIE of CO₂ dilution was between those for He and Ar dilution at a low value of the dilution ratio, while it was higher than those for He and Ar dilution at a high value of the dilution ratio. The thermal and flame-dynamic effects of dilution were discussed to explain the change of the MIE with the dilution ratio.

Original language	English
Pages (from-to)	240-243
Number of pages	4
Journal	Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
Volume	32
Issue number	SUPPL. 1
State	Published - Jun 2011
Externally published	Yes

Keywords

Diluents
H/air
Ignition
Minimum ignition energy

Cite this

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abstract = "A computational study was performed to investigate the effects of diluents (He, Ar, or CO2) on the ignition of premixed H2/air mixtures. The objective of this study was to assess and explain the change of the minimum ignition energies (MIE) with the dilution ratio. It was found that, at the same dilution ratio, the MIE of He dilution was always higher than that of Ar dilution. The MIE of CO2 dilution was between those for He and Ar dilution at a low value of the dilution ratio, while it was higher than those for He and Ar dilution at a high value of the dilution ratio. The thermal and flame-dynamic effects of dilution were discussed to explain the change of the MIE with the dilution ratio.",

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T1 - Effects of diluents on the ignition of premixed H2/air at micro-gravity conditions

AU - Zhang, Wei Kuo

AU - Chen, Zheng

AU - Kong, Wen Jun

PY - 2011/6

Y1 - 2011/6

N2 - A computational study was performed to investigate the effects of diluents (He, Ar, or CO2) on the ignition of premixed H2/air mixtures. The objective of this study was to assess and explain the change of the minimum ignition energies (MIE) with the dilution ratio. It was found that, at the same dilution ratio, the MIE of He dilution was always higher than that of Ar dilution. The MIE of CO2 dilution was between those for He and Ar dilution at a low value of the dilution ratio, while it was higher than those for He and Ar dilution at a high value of the dilution ratio. The thermal and flame-dynamic effects of dilution were discussed to explain the change of the MIE with the dilution ratio.

AB - A computational study was performed to investigate the effects of diluents (He, Ar, or CO2) on the ignition of premixed H2/air mixtures. The objective of this study was to assess and explain the change of the minimum ignition energies (MIE) with the dilution ratio. It was found that, at the same dilution ratio, the MIE of He dilution was always higher than that of Ar dilution. The MIE of CO2 dilution was between those for He and Ar dilution at a low value of the dilution ratio, while it was higher than those for He and Ar dilution at a high value of the dilution ratio. The thermal and flame-dynamic effects of dilution were discussed to explain the change of the MIE with the dilution ratio.

KW - Diluents

KW - H/air

KW - Ignition

KW - Minimum ignition energy

UR - https://www.scopus.com/pages/publications/79960149863

M3 - 文章

AN - SCOPUS:79960149863

SN - 0253-231X

VL - 32

SP - 240

EP - 243

JO - Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics

JF - Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics

IS - SUPPL. 1

ER -

Effects of diluents on the ignition of premixed H₂/air at micro-gravity conditions

Abstract

Keywords

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