高压氢气储运设施泄漏喷射火过程预测模型及其验证

In recent years, hydrogen energy has rapidly become the "new favorite" in the energy field, and is ushering in a period of rapid development of strategic opportunities. However, hydrogen safety issues are still the key to restricting its development, especially the jet fire disaster induced by the leakage of high-pressure hydrogen storage and transportation facilities. In order to explore the process of high-pressure hydrogen leakage and evaluate the changes of the subsequent jet fire characteristics, this paper presents a theoretical analysis and case verification of two experiment cases of high-pressure hydrogen leakage (90 MPa hydrogen reservoir and 6 MPa hydrogen pipeline). The results show that the Abel-Nobel gas state equation is suitable for the description of the leakage process of a variety of high-pressure hydrogen storage and transportation facilities commonly used at present through the model accuracy test. Based on the Abel-Nobel EOS, flame size model, radiation fraction model and thermal radiation model, a prediction model for the process of jet fire resulting from high-pressure hydrogen leakage is established and used to simulate the gas mass flow rate at the leakage exit, hydrogen jet flame length and thermal radiation field in two experiment cases. The calculated results are basically the same with experimental data, which indicates the validity of the prediction model and the rationality of the involved assumptions. Besides, in calculation it also needs to take full account of the energy loss and isothermal flow process during the leakage of high-pressure hydrogen storage and transportation facilities, so as to modify the prediction accuracy of the prediction model. The conclusions hold important practical significance for engineering practice, safe use of hydrogen energy and disaster prevention, etc.