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  |

 

Numerical Simulation of Leaking Hydrogen Dispersion

Kazuo MATSUURA Ehime University, Graduate School of Science and Engineering

Abstract

Safety is one of the most important issues facing the promotion of hydrogen use. Accompanying the more extensive usage of hydrogen is the increased possibility of accidental release within the hydrogen infrastructure which includes storage, bulk transportation and distribution, production and utilization. Thus far, specialists in the field have discussed various safety issues in the handling and use of hydrogen, ranging from a priori to a posteriori issues. These issues include hydrogen embrittlement, permeation, convective leakage, ignition and explosion. In particular, research on leaking hydrogen is important for preventing accidental ignition and setting safety margins for leakage due to embrittlement, incomplete sealing, system degradation and/or human error. Therefore, to ensure the safe use of hydrogen, the development of risk management strategies for hydrogen leakage and dispersion is necessary. In this newsletter, recent progress in numerical simulation of leaking hydrogen dispersion for such purposes is overviewed.

Key words

Hydrogen Safety, Risk Mitigation, Computational Fluid Dynamics, Sensing, Control, Ventilation

Fig. 28.3 L/min H2 Leak, CFD results of H2 distribution at 25 sec after the start of leakage
(left: natural ventilation, right: the proposed forced ventilation control method)