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On strained flames with hypergolic reactants: The H_2/NO/F_2 system in high-speed, supersonic and subsonic mixing-layer combustion

Egolfopoulos, Fokion N. and Dimotakis, Paul E. and Bond, Chris (1996) On strained flames with hypergolic reactants: The H_2/NO/F_2 system in high-speed, supersonic and subsonic mixing-layer combustion. Symposium (International) on Combustion, 26 (2). pp. 2885-2893. ISSN 0082-0784. http://resolver.caltech.edu/CaltechAUTHORS:20160602-184120224

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Abstract

We report on a numerical investigation on the dynamics and structure of strained, non-premixed and premixed, H_2/NO/F_2 flames. This is an important, hypergolic reacting system that has been used in high- power chemical-laser systems and, presently, relied upon in experimental studies of high-speed, supersonic and subsonic, turbulent shear-layer mixing and combustion. The study included a detailed description of the chemical kinetics and molecular transport for the H_2 /NO/F_2 system and was conducted for a wide range of reactant concentrations and inert diluents, with flow/chemical parameters chosen to correspond to specific chemically reacting, supersonic mixing-layer experiments. Both non-premixed and premixed flames were studied using opposed-jet flow configurations. The results confirmed the experimental conclusion that, even at low reactant concentrations, the H_2/NO/F_2 system can sustain high Damköhler number chemical activity at high strain rates with room-temperature free streams. A comparison between the results of the present numerical simulations and the experimental chemically reacting mixing-layer studies, however, indicates that the predominant fraction of product formation in high-speed, turbulent, mixing layers must take place in a mode in which the reactants are in premixed, rather than in non-premixed, strained diffusion flames.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/S0082-0784(96)80129-9DOIArticle
http://www.sciencedirect.com/science/article/pii/S0082078496801299PublisherArticle
Additional Information:© 1996 Elsevier. This work was supported by the Fred O’Green Assistant Professorship in Engineering at the University of Southern California and by the Air Force Office of Scientific Research, Grant No. F49620-94-1-0353, at Caltech.
Group:GALCIT
Funders:
Funding AgencyGrant Number
University of Southern CaliforniaUNSPECIFIED
Air Force Office of Scientific Research (AFOSR)F49620-94-1-0353
Record Number:CaltechAUTHORS:20160602-184120224
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160602-184120224
Official Citation:Fokion N. Egolfopoulos, Paul E. Dimotakis, Chris Bond, On strained flames with hypergolic reactants: The H2/NO/F2 system in high-speed, supersonic and subsonic mixing-layer combustion, Symposium (International) on Combustion, Volume 26, Issue 2, 1996, Pages 2885-2893, ISSN 0082-0784, http://dx.doi.org/10.1016/S0082-0784(96)80129-9. (http://www.sciencedirect.com/science/article/pii/S0082078496801299)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67631
Collection:CaltechAUTHORS
Deposited By: Paul Dimotakis
Deposited On:03 Jun 2016 20:28
Last Modified:21 Sep 2016 23:05

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