Newsletter  2012.4  Index

Theme : "Hydrogen Flow"   Preface (M. Ogino, H. Hamakawa, K. Morimoto) Integrated Computational Study of Atomization Process of Liquid Hydrogen Pin-Hall Leakage Jet Jun ISHIMOTO (Tohoku University) Experimental study on hydrogen dispersion Masahiro INOUE (Kyushu University) Fundamental Characteristics for Open-Jet Flame of High-Pressurized Hydrogen Keiji TAKENO (Mitsubishi Heavy Industries, Ltd., Nagasaki R&D Center) Numerical Simulation of Leaking Hydrogen Dispersion Kazuo Matsuura (Ehime University)   |  Back  |

 

Fundamental Characteristics for Open-Jet Flame of High-Pressurized Hydrogen

Keiji TAKENO Mitsubishi Heavy Industries, Ltd., Nagasaki R&D Center

Abstract

The utilization of hydrogen for energy use is attractive since the exhaust gas is H2O alone and will spread widely.ﾂ In order to promote the widespread use of fuel cell vehicles, supply stations of high pressure hydrogen should be constructed in a city area, based on the safety regulations such as maximum storage amount, layout, material, safety distance, or protection wall.ﾂ For the purpose, fundamental data for the open-jet hydrogen flame of high-pressurized hydrogen up to 80MPa have been accumulated.ﾂ In this letter, the scale of diffusion flame and the chemical and fluid dynamic structure of flame stabilization are discussed.

 

Key words

hydrogen, safety, high pressure, diffusion flame, open jet

Calculated results of pressure and velocity distribution adjacent to the nozzle outlet when high pressurized hydrogen is spouted from diam.=1mm nozzle
(barrel shock and mach disc are observed).