Study on Thermal Radiation Characteristics and the Multi-Point Source Model of Hydrogen Jet Fire

Author:

Zhang Haiyang1,Cao Xun1,Yuan Xuhao1,Wu Fengrong2,Wang Jing1,Zhang Yankang1,Li Qianqian1,Liu Hu1,Huang Zuohua1ORCID

Affiliation:

1. State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China

2. China Petroleum Pipeline Engineering Corporation, Langfang 065000, China

Abstract

Hydrogen safety remains a paramount concern in pipeline transportation. Once hydrogen leaks and ignites, it quickly escalates into a jet fire incident. The substantial thermal radiation released poses significant risks of fire and explosion. Therefore, studying the thermal radiation characteristics of hydrogen jet fires and developing accurate prediction models are crucial for establishing relevant safety standards. To address the oversimplified consideration of weighted coefficients in thermal radiation prediction models, this study investigated the thermal radiation characteristics of hydrogen jet fire by carrying out experiments and numerical simulations. The results reveal the significant impacts of the leakage diameter and pressure on thermal radiation. Increases in both the leakage diameter and pressure lead to a rapid escalation in the thermal radiation release, highlighting their critical importance in establishing safety standards for hydrogen pipeline transportation. Additionally, this study optimized the weight coefficients in the multi-point source prediction model based on temperature distribution along the flame axis. The optimized model was validated through comparison with experimental data. After optimization, the prediction error of the multi-point source radiation model was reduced from 19.5% to 13.9%. This model provides significant support for accurately evaluating the risk of hydrogen jet fire.

Funder

Science and Technology Plan Program of Yulin

Natural Science Basic Research Program of Shaanxi Province

China Petroleum Pipeline Engineering Corporation

Publisher

MDPI AG

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