A numerical study on the response of trimethyl phosphate-doped laminar counterflow diffusion flames to strain rate variations

Badhuk, P and Ravikrishna, RV (2019) A numerical study on the response of trimethyl phosphate-doped laminar counterflow diffusion flames to strain rate variations. In: 12th Asia-Pacific Conference on Combustion, ASPACC 2019, 1 st -5 th July 2019, Fukuoka, Japan.

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Abstract

The present work numerically investigates the effect of strain rate on a Trimethyl phosphate (TMP) doped laminar counterflow diffusion flame (CDF) of methane at ambient pressure. The response of the temperature, net heat release rate, and concentration of the chain carrying radicals to different strain rates and TMP loadings are studied. For the range of concentration studied herein, the application of TMP enhances the peak flame temperature and net heat release rate at low strain rates while near extinction, a reversal of this trend is observed. However, the concentration of the chain carrying radicals is reduced at all strain rates. The behaviour at low strain rates is a direct consequence of an accelerated approach to the thermodynamic equilibrium as established from the profiles of net heat release rate and CO2 concentration. At higher strain rates, we analyse the relevant Damköhler numbers (Da), net heat release rate and efficiency of radical recombination to show that phosphorus chemistry gets more significantly affected as compared to the hydrocarbon chemistry. Despite retarded chemistry, the catalytic recombination reactions continue to reduce the concentration of the radical pool. This leads to a faster extinction of the flame in the presence of TMP. © Asia-Pacific Conference on Combustion, ASPACC 2019.All right reserved.

Item Type:	Conference Paper
Publication:	12th Asia-Pacific Conference on Combustion, ASPACC 2019
Publisher:	Combustion Institute
Additional Information:	cited By 0; Conference of 12th Asia-Pacific Conference on Combustion, ASPACC 2019 ; Conference Date: 1 July 2019 Through 5 July 2019; Conference Code:149702
Keywords:	Combustion, Catalytic recombination; Heat Release Rate (HRR); Hydrocarbon chemistry; Laminar counterflow; Phosphorus chemistry; Radical recombination; Thermodynamic equilibria; Trimethyl phosphate, Strain rate
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	19 Nov 2020 10:21
Last Modified:	25 Sep 2022 07:11
URI:	https://eprints.iisc.ac.in/id/eprint/65391

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