Numerical simulation of auto-ignition induced by high-pressure hydrogen release with detailed reaction model: Fluid dynamic effect by diaphragm shape and boundary layer

被引：27

作者：

Asahara, Makoto ^{[1
]}

Yokoyama, Akinori ^{[1
]}

Hayashi, A. Koichi ^{[1
]}

Yamada, Eisuke ^{[1
]}

Tsuboi, Nobuyuki ^{[2
]}

机构：

[1] Aoyama Gakuin Univ, Dept Mech Engn, Chuo Ku, Sagamihara, Kanagawa 2525258, Japan

[2] Kyusyu Inst Technol, Dept Machine Intelligence, Kitakyushu 8048550, Japan

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 35期

关键词：

High-pressure hydrogen release; Auto-ignition; Real-size effect; Instabilities; Direct numerical simulation; SELF-IGNITION; FLAME PROPAGATION; GAS; DISCHARGE;

D O I：

10.1016/j.ijhydene.2014.05.136

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 effects of the diaphragm shape and boundary layer near walls on auto-ignition induced by high-pressure hydrogen release in a real size tube are numerically studied using the Navier-Stokes equations with multi-component gases. The numerical results show that there is a grid dependency that provides the optimal grid system via a comparison the theoretical boundary layer thickness. The validity of the present numerical system is confirmed by comparing the numerical and experimental precursor shock wave velocities. The initial diaphragm shape affects the hydrogen release flow structure and its auto-ignition mechanism. Two different auto-ignition styles are observed from the numerical results: one occurs near the boundary layer owing to the induction time effect and Kelvin-Helmholtz instability and another may occur near the center axis owing to the Rayleigh-Taylor instability. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：20378 / 20387

页数：10

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