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Hydrogen jet autoignition in a co-flow and in a wake of heated air

Kalbhor, A and Moitro, A and Chaudhuri, S and Chitilappilly, L (2018) Hydrogen jet autoignition in a co-flow and in a wake of heated air. In: 5th International Conference on Computational Methods for Thermal Problems, THERMACOMP 2018, 9 - 11 July 2018, Bengaluru, pp. 43-46.

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Official URL: https://www.scopus.com/record/display.uri?eid=2-s2...


Direct Numerical Simulations (DNS) coupled with detailed chemical kinetics are used for a comparative study on the autoignition characteristics of a laminar hydrogen-nitrogen (H2-N2) jet issued into i) co-flow of heated air ii) wake of heated air. Detailed analysis of the autoignition chemistry and the relative roles of certain radical species in the initiation of autoignition process in these non-premixed jets is investigated by tracking the evolution of important chain reactions using a Lagrangian particle tracking approach. The reaction H2+ O2⇄ HO2+ H is recognized to be the dominant chain initiation reaction during pre-ignition stage. The autoignition process is found to be marginally accelerated for higher jet velocity ratios in both the non-premixed configurations under the study.

Item Type: Conference Paper
Publication: International Conference on Computational Methods for Thermal Problems
Publisher: Dalian University of Technology
Additional Information: The copyright for this article belongs to the Dalian University of Technology.
Keywords: Auto-ignition; Direct numerical simulations; Hydrogen
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 22 Aug 2022 10:31
Last Modified: 22 Aug 2022 10:31
URI: https://eprints.iisc.ac.in/id/eprint/75944

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