EXTRACTION OF RATE COEFFICIENTS OF MULTI-STEP GLOBAL REACTIONS FOR COMBUSTION OF HYDROCARBON FUELS REGARDING OPERATING CONDITIONS FOR POLLUTANT PREDICTION

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SHAKERI ALIREZA; MAZAHERI KARIM

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:1 Page(s): 163-172

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Title

EXTRACTION OF RATE COEFFICIENTS OF MULTI-STEP GLOBAL REACTIONS FOR COMBUSTION OF HYDROCARBON FUELS REGARDING OPERATING CONDITIONS FOR POLLUTANT PREDICTION

Author(s)

SHAKERI ALIREZA | MAZAHERI KARIM | Issue Writer Certificate

Keywords

FIVE STEP GLOBAL MECHANISMSQ1

DIFFERENTIAL EVOLUTION OPTIMIZERQ1

PERFECTLY STIRRED REACTORQ1

COMPUTATIONAL FLUID DYNAMICSQ1

FULL GRI.3 MECHANISMQ1

Abstract

In this paper, a numerical method to extract rate coefficients of multi-step global reactions for combustion of hydrocarbon fuels with air regarding combustor operating conditions is presented and implemented. The numerical procedure is based on simultaneous interactions of two solvers including a solver for combustive field and another solver as numerical optimizer. A simple reactor solver, namely PERFECTLY STIRRED REACTOR (PSR) is employed as a solver for reactive flow, and chemical kinetics such as detailed, skeletal or reduced can be considered as benchmark mechanism. Considering rate coefficients of predefined multi-step global reactions as design variables for Differential Evolution (DE) optimizer and the difference between product concentrations obtained from benchmark mechanism and multi-step mechanism as cost function gives optimized values of rate coefficients regarding desired conditions. To confirm reliability and applicability of the present method, three different five-step models are generated for methane-air combustion under three different operating pressures (1.0, 6.28, and 30.0 atm.) and equivalence ratio ranges between 0.4-1.0 for predicting NO and CO emissions. Product concentrations such as NO and CO and flame temperature obtained from the presented five-step mechanisms are in close agreement with results obtained from the full GRI-3.0 mechanism. A comparative numerical study by means of COMPUTATIONAL FLUID DYNAMICS (CFD) code has been performed for a laboratory scale combustor employing the generated five-step model and an eight-step pressure-dependent global mechanism (suggested by Novosselov) under operating pressure of 6.28 (atm.).

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APA: Copy

SHAKERI, ALIREZA, & MAZAHERI, KARIM. (2016). EXTRACTION OF RATE COEFFICIENTS OF MULTI-STEP GLOBAL REACTIONS FOR COMBUSTION OF HYDROCARBON FUELS REGARDING OPERATING CONDITIONS FOR POLLUTANT PREDICTION. MODARES MECHANICAL ENGINEERING, 16(1), 163-172. SID. https://sid.ir/paper/178453/en

Vancouver: Copy

SHAKERI ALIREZA, MAZAHERI KARIM. EXTRACTION OF RATE COEFFICIENTS OF MULTI-STEP GLOBAL REACTIONS FOR COMBUSTION OF HYDROCARBON FUELS REGARDING OPERATING CONDITIONS FOR POLLUTANT PREDICTION. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(1):163-172. Available from: https://sid.ir/paper/178453/en

IEEE: Copy

ALIREZA SHAKERI, and KARIM MAZAHERI, “EXTRACTION OF RATE COEFFICIENTS OF MULTI-STEP GLOBAL REACTIONS FOR COMBUSTION OF HYDROCARBON FUELS REGARDING OPERATING CONDITIONS FOR POLLUTANT PREDICTION,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 1, pp. 163–172, 2016, [Online]. Available: https://sid.ir/paper/178453/en

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