Details

Title: Influence of Chemical Kinetics on Detonation Initiation by Temperature Gradients in H₂/air and CH₄/air Explosions // Proceedings of the Ninth International Seminar on Fire and Explosion Hazards. Vol. 2: 21-26 April 2019, Saint Petersburg, Russia
Creators: Wang С.; Qian С.; Liu J.; Liberman M.
Organization: Beijing Institute of Technology; Stockholm University
Imprint: Saint Petersburg, 2019
Collection: Общая коллекция
Document type: Article, report
File type: PDF
Language: English
DOI: 10.18720/SPBPU/2/k19-5
Rights: Свободный доступ из сети Интернет (чтение, печать, копирование)

Allowed Actions: Read Download (1.8 Mb)

Group: Anonymous

Network: Internet

Annotation

Understanding the mechanisms of explosions is essential for the development of safety measured and for minimizing devastating hazards. Due to the complexity of real chemistry, a one-step reaction model has been often used for theoretical and numerical studies. In this paper we compare conditions for the detonation development from the spontaneous wave in a hot spot for a one-step model with that obtained for detailed chemical models. It is shown that for detailed chemical models conditions required for the detonation development from the spontaneous wave in a hot spot are more limited than that for the use of simplified chemical models. In particular, the minimum hot spot size capable of producing a detonation calculated with the detailed chemical model is at least an order of magnitude larger than that predicted by a one-step model even at high initial pressures. The impact of a detailed chemical model is particularly pronounced for the methane/air mixture, where not only is the hot spot size much greater than that predicted by a one-step model, but the initiation of detonation by the hot spot with a temperature gradient is possible only if the ambient temperature outside the gradient is above 1100 K.

Document access rights

Network User group Action
ILC SPbPU Local Network All Read Print Download
Internet Authorized users Read Print Download
-> Internet Anonymous Read Print Download

Usage statistics

stat Access count: 145
Last 30 days: 11
Detailed usage statistics