Experimental Investigation of Flame-Wall-Impingement and Near-Wall Combustion on the Piston Temperature of a Diesel Engine Using Instantaneous Surface Temperature Measurements

Mayer, Daniel; Seelig, Alexander; Kunz, Torsten; Köpple, Fabian; Mansbart, Matthias; Bargende, Michael

doi:10.4271/2018-01-1782

Cited by 12 publications

(4 citation statements)

References 18 publications

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“…The heat transfer process, especially in an internal combustion engine, is controlled by forced convection, which is substantially affected by the mean gas flow, turbulence, premixed flame propagation, and spray impingement on the combustion chamber walls. All these factors contribute to a transient heat flux, leading to a rapidly changing temporal and spatial temperature distributions at the surface of the combustion chamber walls [207,208]. , Fig.…”

Section: Spray Flame/liquid Film-turbulence-wall Interactionsmentioning

confidence: 99%

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Spray–turbulence–chemistry interactions under engine-like conditions

Zhou

Zhao

Luo

et al. 2021

Progress in Energy and Combustion Science

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Section: Spray Flame/liquid Film-turbulence-wall Interactionsmentioning

confidence: 99%

“…, Fig. 30 presents a brief mechanism for the mutual interaction between spray, flame, wall, and turbulence based on several studies [173,[207][208][209][210]. The three key processes are:…”

Section: Spray Flame/liquid Film-turbulence-wall Interactionsmentioning

confidence: 99%

Spray–turbulence–chemistry interactions under engine-like conditions

Zhou

Zhao

Luo

et al. 2021

Progress in Energy and Combustion Science

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“…The walls of the cylinder and piston are subjected to a wide range of surface heat flux ranging from zero to several MW/m 2 6 , 7 . Therefore, measurement analysis of transient heat transfer of internal combustion engine can understand internal heat transfer processes to find ways to improve engine thermal efficiency and reduce emissions and heat loss 8 .…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of heat transfer for diesel spray impingement on a high temperature wall

Guo

Zhang

Jin

et al. 2022

Sci Rep

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In this paper, the heat transfer characteristics of spray-wall impingement on a high temperature wall were studied by using a transient thermocouple and a one-dimensional finite-difference conduction model to obtain variations of wall temperature and heat flux. Results showed that increasing the injection pressure and decreasing the ambient temperature both caused an increase in surface heat flux and heat transfer coefficient. However, with the increase of the initial surface temperature from 200 to 600 °C, the surface heat flux and heat transfer coefficient first increased and then decreased, and reached the maximum at about 520 °C and 390 °C respectively, which was due to the change of heat transfer regime on the wall. The contribution of experimental factors descended in the order of initial surface temperature, injection pressure and ambient temperature. The dimensionless surface heat fluxes in terms of Biot and Fourier numbers were highly similar and a dimensionless correlation was developed to quantify this heat transfer behavior, which showed that the ratio of the thermal resistance of the high temperature wall to the thermal resistance of convection heat transfer on the wall surface changed almost linearly during the process of spray-wall impingement.

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“…23 Heat flux measurements therefore yield different features, 8,9,24 with heat fluxes as high as 10 MW/m 2 exhibiting a plateau of a few milliseconds rather than a spike of heat flux. 25,26 Extensive studies 27–29 about diesel jet impingement showed that a cool flame develops close to the wall, due to either higher premixing or because of extinction of the diffusion flame or dying flame, although it is still surrounded by high temperature reactions at the diverted tip, in some cases leading to the deposition of soot. 27,28 Thermal transfer during jet impingement is not understood as well as in SI engines.…”

Section: Introductionmentioning

confidence: 99%

High-frequency wall heat flux measurement during wall impingement of a diffusion flame

Moussou

Pilla

Sotton

et al. 2019

International Journal of Engine Research

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The efficiency of internal combustion engines is limited by heat losses to the wall of the combustion chamber. A precise characterization of wall heat flux is therefore needed to optimize engine parameters. However, the existing measurements of wall heat fluxes have significant limitations; time resolution is often higher than the timescales of the physical phenomena of flame–wall interaction. Furthermore, few studies have investigated diesel flame conditions (as opposed to propagation flames). In this study, the heat flux generated by a diffusion flame impinging on a wall was measured with thin-junction thermocouple, with a time resolution of the whole acquisition chain better than 0.1 ms. The effects of variations in ambient gas temperature, injection pressure and injector–wall distance were investigated. Diesel spray impingement on the wall is shown to cause strong gas–wall thermal exchange, with convection coefficients of 6–12 kW/m2/K. Those results suggest the necessity of close-wall aerodynamic measurements to link macroscopic characteristics of the spray (injection pressure, impingement geometry) to turbulence values.

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Experimental Investigation of Flame-Wall-Impingement and Near-Wall Combustion on the Piston Temperature of a Diesel Engine Using Instantaneous Surface Temperature Measurements

Cited by 12 publications

References 18 publications

Spray–turbulence–chemistry interactions under engine-like conditions

Spray–turbulence–chemistry interactions under engine-like conditions

Experimental investigation of heat transfer for diesel spray impingement on a high temperature wall

High-frequency wall heat flux measurement during wall impingement of a diffusion flame

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