KIT | KIT-Bibliothek | Impressum | Datenschutz

Analysis of spontaneous ignition of hydrogen-enriched methane in a rectangular tube

Zhou, Shangyong; Xiao, Jianjun 1; Luo, Zhenmin ; Kuznetsov, Mike 1; Chen, Zheng; Jordan, Thomas 1; Banuti, Daniel T. 1
1 Institut für Thermische Energietechnik und Sicherheit (ITES), Karlsruher Institut für Technologie (KIT)

Abstract:

This study investigates the spontaneous ignition of high-pressure hydrogen-enriched methane in air within a rectangular tube. A computationally efficient approach has been adopted, utilizing a reduced reaction mechanism and ignition delay model within a 3D Large Eddy Simulation (LES) framework. This approach overcomes the limitations of traditional 1D and 2D simulations with detailed chemistry models, which are unable to accurately reproduce the complex 3D shock wave structures within the tube. The simulated shock wave behavior during 9 MPa hydrogen leakage (case 1) and 11 MPa 90 vol% hydrogen/10 vol% methane mixture leakage (case 2) are found to agree well with experimental observations. In case 2, the hot spots generated by reflected shock waves and Mach reflections ignite the hydrogen/methane-air mixture, resulting in three sequential spontaneous ignitions. The flame is observed to primarily propagate along the tube corners and wall centers, with the central ignition spreading across the entire cross-section. For the 25 MPa 24 vol% hydrogen/76 vol% methane mixture leakage (case 6), the shock intensity is significantly reduced due to the increased methane proportion, leading to spontaneous ignition only at the tube corners when the hemispherical shock wave reflects from the wall. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000173651
Veröffentlicht am 23.08.2024
Originalveröffentlichung
DOI: 10.1016/j.proci.2024.105681
Scopus
Zitationen: 2
Web of Science
Zitationen: 2
Dimensions
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Thermische Energietechnik und Sicherheit (ITES)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2024
Sprache Englisch
Identifikator ISSN: 1540-7489
KITopen-ID: 1000173651
HGF-Programm 38.03.02 (POF IV, LK 01) Power-based Fuels and Chemicals
Erschienen in Proceedings of the Combustion Institute
Verlag Elsevier
Band 40
Heft 1-4
Seiten 105681
Vorab online veröffentlicht am 31.07.2024
Nachgewiesen in Dimensions
Scopus
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page