Investigation of fuel volatility on the heat transfer dynamics on piston surface due to the pulsed spray impingement

Zhou, Zhifu; Liang, Lin; Murad, Safwan Hanis Mohd; Camm, Joseph; Davy, Martin

doi:10.1016/j.ijheatmasstransfer.2021.121008

Cited by 6 publications

(2 citation statements)

References 33 publications

(40 reference statements)

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“…The charged gas in the CVCC could be heated to 220 °C by the ambient heating system and monitored by the same K-type thermocouple inserted into the inner wall of the chamber. Zhou et al 30 reported that only the temperature measured by the thermocouple located in the central of the spray-wall impingement changed significantly. In this study, a transient thermocouple (NANMAC-E6) with a response time of 20 microseconds was flush mounted at the center of the flat wall and parallel to the impingement surface to monitor the transient temperature of the wall surface during the process of spray impingement.…”

Section: Methodsmentioning

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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Section: Methodsmentioning

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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“…High volatile fuel tends to increase the evaporation rate and lowers SMD thus reducing the spray penetration length [160][161][162][163][164][165]. Low volatile fuel, on the other hand, has relatively lower evaporation rate, larger droplets size, thus increasing spray penetration length, which in some cases could lead to the wall impingement [166][167][168][169][170].…”

Section: Factors Affecting Spray Evolutionmentioning

confidence: 99%

Diesel Spray: Development of Spray in Diesel Engine

Djamari

Idris²,

Paristiawan³

et al. 2022

Sustainability

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Research and development in the internal combustion engine (ICE) has been growing progressively. Issues such as air pollution, fuel cost, and market competitiveness have driven the automotive industry to develop and manufacture automobiles that meet new regulation and customers’ needs. The diesel engine has some advantages over the gasoline or spark ignition engine, including higher engine efficiency, greater power output, as well as reliability. Since the early stage of the diesel engine’s development phase, the quest to obtain better atomization, proper fuel supply, and accurate timing control, have triggered numerous innovations. In the last two decades, owing to the development of optical technology, the visualization of spray atomization has been made possible using visual diagnostics techniques. This advancement has greatly improved research in spray evolution. Yet, a more comprehensive understanding related to these aspects has not yet been agreed upon. Diesel spray, in particular, is considered a complicated phenomenon to observe because of its high-speed, high pressure, as well as its high temperature working condition. Nevertheless, several mechanisms have been successfully explained using fundamental studies, providing several suggestions in the area, such as liquid atomization and two-phase spray flow. There are still many aspects that have not yet been agreed upon. This paper comprehensively reviews the current status of theoretical diesel spray and modelling, including some important numerical and experimental aspects.

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Effect of elliptical and circular GDI injectors on spray impingement characteristics

JI,

YU,

et al. 2024

Sādhanā

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Investigation of fuel volatility on the heat transfer dynamics on piston surface due to the pulsed spray impingement

Cited by 6 publications

References 33 publications

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

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

Diesel Spray: Development of Spray in Diesel Engine

Effect of elliptical and circular GDI injectors on spray impingement characteristics

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