Numerical study of swirl cooling enhancement by adding mist to air: Effects of droplet diameter and mist concentration

Han, Shaohua; Zhang, Runsheng; Song, Yuanyuan; Xing, Jiangjiang; Zhou, Leping; Li, Li; Zhang, Hui; Du, Xiaoze

doi:10.1016/j.applthermaleng.2022.118475

Cited by 13 publications

(2 citation statements)

References 42 publications

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“…A number of Eulerian-as well as Lagrangian-based methods were successfully employed to model the spray behavior in dilute sprays [180][181][182][183][184]. Such methods are also able to model the two-phase interaction involving droplets (liquid) and surrounding incylinder gas.…”

Section: Modeling Of Turbulent Diesel Spray and Combustionmentioning

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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Section: Modeling Of Turbulent Diesel Spray and Combustionmentioning

confidence: 99%

Diesel Spray: Development of Spray in Diesel Engine

Djamari

Idris²,

Paristiawan³

et al. 2022

Sustainability

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“…Trenched holes, employed in diverse applications such as industrial furnaces and gas turbine components, epitomize an advanced film cooling technique [1][2][3]. In this method, the coolant injection hole opening is intricately linked to a longitudinal groove carved into the surface exposed to the hot mainstream gas [4,5].…”

Section: Introductionmentioning

confidence: 99%

Strategic Cooling Enhancement through Trench-Shaped Injection Holes - Two-Phase Numerical Study

Verma,

Mishra

2024

Proceedings of the 9th World Congress on Momentum, Heat and Mass Transfer

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A two-phase numerical investigation on trench-shaped injection holes for film cooling is being conducted using Reynolds-averaged Navier-Stokes simulations to assess their practical effectiveness. The study is focusing on the cooling performance of a novel type of film holes, known as straight transverse trenches attached to a flat plate, using a mixture of water mist and air in the coolant fluid. The examination considers film cooling with varying turbulent intensities (3%, 10%, and 20%) and mist concentrations (4%, 7%, and 10%). The analysis involves adiabatic laterally averaged film cooling effectiveness parameters, with two blowing ratios ranging from 0.6 to 1.0. The findings indicate that trenched cooling holes exhibit a more uniform coolant distribution laterally at all positions, resulting in enhanced cooling performance, particularly at high blowing ratios.

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