Effects of hydrogen concentration on premixed laminar flames of hydrogen-methane-air

被引：113

作者：

Okafor, Ekenechukwu C. ^{[1
]}

Hayakawa, Akihiro ^{[1
]}

Nagano, Yukihide ^{[1
]}

Kitagawa, Toshiaki ^{[1
]}

机构：

[1] Kyushu Univ, Fac Engn, Dept Mech Engn, Nishi Ku, Fukuoka 8190395, Japan

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 05期

关键词：

Hydrogen; Methane; Laminar burning velocity; Markstein number; Lewis number; Flame instability; TURBULENT BURNING VELOCITY; EXPANDING SPHERICAL FLAMES; ELEVATED PRESSURES; MARKSTEIN LENGTH; MIXTURES; PROPAGATION; HYDROCARBON; ENGINE; SPEEDS; FLOWS;

D O I：

10.1016/j.ijhydene.2013.11.128

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The unstretched laminar burning velocities and Markstein numbers of spherically propagating hydrogen-methane-air flames were studied at a mixture pressure of 0.10 MPa and a mixture temperature of 350 K. The fraction of hydrogen in the binary fuel was varied from 0 to 1.0 at equivalence ratios of 0.8, 1.0 and 1.2. The unstretched laminar burning velocity increased non-linearly with hydrogen fraction for all the equivalence ratios. The Markstein number varied non-monotonically at equivalence ratios of 0.8 and 1.0 and increased monotonically at equivalence ratio of 1.2 with increasing hydrogen fraction. Analytical evaluation of the Markstein number suggested that the trends could be due to the effective Lewis number, which varied non-monotonically with hydrogen fraction at equivalence ratios of 0.8 and 1.0 and increased monotonically at 1.2. The propensity of flame instability varied non-monotonically with hydrogen fraction at equivalence ratios of 0.8 and 1.0. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：2409 / 2417

页数：9

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