Title: New Measurement Technique for Vaporization Velocity of Spreading Cryogenic Liquid // Proceedings of the Ninth International Seminar on Fire and Explosion Hazards. Vol. 1: 21-26 April 2019, Saint Petersburg, Russia
Creators: Kim M.; Nguyen L.; Chung K.
Organization: Korea Institute of Machinery and Materials; University of Science and Technology
Imprint: Saint Petersburg, 2019
Collection: Общая коллекция
Document type: Article, report
File type: PDF
Language: English
DOI: 10.18720/SPBPU/2/k19-8
Rights: Свободный доступ из сети Интернет (чтение, печать, копирование)

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The study of liquid pool spreading plays an essential role in the quantitative risk assessment of accidentally released cryogenic liquids, such as LNG and liquefied hydrogen because the spreading of such liquids is the first step in the development of multi-staged accident sequences leading to a major disaster. There is a wide range of models used to describe the spreading of a cryogenic liquid pool. Many of these models require vaporization velocity, which has to be determined experimentally because the heat transfer process between the liquid pool and the surroundings is too complicated to be modeled. A constantly-released-flow onto unbounded ground was intended to generate the spreading pool because in almost all real accidents, a cryogenic liquid spills and spreads over a large or unbounded ground. According to the results, a greater release flow rate results in a greater vaporization velocity, and the vaporization velocity decreases with the spreading time. Measured vaporization velocities are compared to those obtained from a theoretical model to show good agreement in magnitude and trends. This agreement validates the semi-theoretical method to measure the vaporization velocity for the spreading pool without providing the information about the spill rate and pool mass.

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