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Computation of Entropy Production in Stratified Flames Based on Chemistry Tabulation and an Eulerian Transported Probability Density Function Approach

Dressler, Louis ; Nicolai, Hendrik ; Agrebi, Senda ; Ries, Florian ; Sadiki, Amsini (2022):
Computation of Entropy Production in Stratified Flames Based on Chemistry Tabulation and an Eulerian Transported Probability Density Function Approach. (Publisher's Version)
In: Entropy, 24 (5), MDPI, e-ISSN 1099-4300,
DOI: 10.26083/tuprints-00021282,
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Item Type: Article
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: Computation of Entropy Production in Stratified Flames Based on Chemistry Tabulation and an Eulerian Transported Probability Density Function Approach
Language: English
Abstract:

This contribution presents a straightforward strategy to investigate the entropy production in stratified premixed flames. The modeling approach is grounded on a chemistry tabulation strategy, large eddy simulation, and the Eulerian stochastic field method. This enables a combination of a detailed representation of the chemistry with an advanced model for the turbulence chemistry interaction, which is crucial to compute the various sources of exergy losses in combustion systems. First, using detailed reaction kinetic reference simulations in a simplified laminar stratified premixed flame, it is demonstrated that the tabulated chemistry is a suitable approach to compute the various sources of irreversibilities. Thereafter, the effects of the operating conditions on the entropy production are investigated. For this purpose, two operating conditions of the Darmstadt stratified burner with varying levels of shear have been considered. The investigations reveal that the contribution to the entropy production through mixing emerging from the chemical reaction is much larger than the one caused by the stratification. Moreover, it is shown that a stronger shear, realized through a larger Reynolds number, yields higher entropy production through heat, mixing and viscous dissipation and reduces the share by chemical reaction to the total entropy generated.

Journal or Publication Title: Entropy
Volume of the journal: 24
Issue Number: 5
Publisher: MDPI
Collation: 20 Seiten
Uncontrolled Keywords: entropy generation, combustion, large eddy simulation, flamelet generated manifold, eulerian stochastic fields
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 16 Department of Mechanical Engineering > Simulation of reactive Thermo-Fluid Systems (STFS)
16 Department of Mechanical Engineering > Institute of Reactive Flows and Diagnostics (RSM)
Date Deposited: 06 May 2022 11:15
Last Modified: 06 May 2022 11:16
DOI: 10.26083/tuprints-00021282
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-212828
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21282
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