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Impact of Multi-Component Surrogates on the Performances, Pollutants, and Exergy of IC Engines

Mondo, Kambale ; Agrebi, Senda ; Hamdi, Fathi ; Lakhal, Fatma ; Sadiki, Amsini ; Chrigui, Mouldi (2022):
Impact of Multi-Component Surrogates on the Performances, Pollutants, and Exergy of IC Engines. (Publisher's Version)
In: Entropy, 24 (5), MDPI, e-ISSN 1099-4300,
DOI: 10.26083/tuprints-00021378,
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Item Type: Article
Origin: Secondary publication via sponsored Golden Open Access
Status: Publisher's Version
Title: Impact of Multi-Component Surrogates on the Performances, Pollutants, and Exergy of IC Engines
Language: English
Abstract:

Even though there is a pressing interest in clean energy sources, compression ignition (CI) engines, also called diesel engines, will remain of great importance for transportation sectors as well as for power generation in stationary applications in the foreseeable future. In order to promote applications dealing with complex diesel alternative fuels by facilitating their integration in numerical simulation, this paper targets three objectives. First, generate novel diesel fuel surrogates with more than one component. Here, five surrogates are generated using an advanced chemistry solver and are compared against three mechanisms from the literature. Second, validate the suggested reaction mechanisms (RMs) with experimental data. For this purpose, an engine configuration, which features a reacting spray flow evolving in a direct-injection (DI), single-cylinder, and four-stroke motor, is used. The RNG k-Epsilon coupled to power-law combustion models is applied to describe the complex in-cylinder turbulent reacting flow, while the hybrid Eulerian-Lagrangian Kelvin Helmholtz-Rayleigh Taylor (KH-RT) spray model is employed to capture the spray breakup. Third, highlight the impact of these surrogate fuels on the combustion properties along with the exergy of the engine. The results include distribution of temperature, pressure, heat release rate (HRR), vapor penetration length, and exergy efficiency. The effect of the surrogates on pollutant formation (NOₓ, CO, CO₂) is also highlighted. The fifth surrogate showed 47% exergy efficiency. The fourth surrogate agreed well with the maximum experimental pressure, which equaled 85 Mpa. The first, second, and third surrogates registered 400, 316, and 276 g/kg fuel, respectively, of the total CO mass fraction at the outlet. These quantities were relatively higher compared to the fourth and fifth RMs.

Journal or Publication Title: Entropy
Volume of the journal: 24
Issue Number: 5
Place of Publication: Darmstadt
Publisher: MDPI
Collation: 24 Seiten
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 16 Department of Mechanical Engineering > Institute of Reactive Flows and Diagnostics (RSM)
Date Deposited: 17 May 2022 12:41
Last Modified: 18 Aug 2022 12:37
DOI: 10.26083/tuprints-00021378
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-213786
Additional Information:

This article belongs to the Special Issue Entropy Generation Analysis in Near-Wall Turbulent Flow (s. verwandtes Werk).

Keywords: diesel surrogate; reaction mechanism; RNG; four-stroke IC engine; exergy efficiency

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21378
PPN: 494769823
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