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Atomization and Sprays
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ISSN Онлайн: 1936-2684

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SPH SIMULATIONS OF DROP IMPACT ON HEATED WALLS AND DETERMINATION OF IMPACT CRITERIA

Том 30, Выпуск 2, 2020, pp. 131-152
DOI: 10.1615/AtomizSpr.2020032857
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Краткое описание

The outcomes of fuel drop impact on a combustion chamber wall will affect the fuel-air mixture distribution and subsequent combustion performance of an internal combustion engine. In this paper, the process offuel drop impact on a solid dry surface was simulated, using a numerical method based on smoothed particle hydrodynamics (SPH). This method was first validated using experimental data on the impact regimes of ethanol drops and n-heptane drops on a heated surface. Various impact outcomes: deposition, contact-splash, bounce, and film-splash, were predicted successfully. Then, the impact process of iso-octane drops on a solid surface under engine-relevant conditions was studied. Numerical results show that the splash threshold will decrease as the wall temperature increases. A variety of impact regimes were identified and the impact outcomes in each regime were analyzed. Based on the simulation results, the splashed mass ratio will increase as the kinetic energy of the incident drop and the wall temperature increase. The impact outcomes were found to be similar if the wall temperature is higher than the drop's Leidenfrost temperature. The effect of wall temperature on the impact outcomes was characterized and incorporated into the model. The proposed drop/wall interaction model, derived from the present SPH study, can be readily implemented for engine spray/wall impingement simulation.

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ЦИТИРОВАНО В
  1. Subedi Kshitiz Kumar, Kong Song-Charng, Modeling the Effects of Drop Impingement Frequency on Heated Walls at Engine Conditions, SAE Technical Paper Series, 1, 2022. Crossref

  2. Pan Yaoyu, Yang Xiufeng, Kong Song-Charng, Ting Foo Chern, Iyer Claudia, Yi Jianwen, Characterization of fuel drop impact on wall films using SPH simulation, International Journal of Engine Research, 23, 3, 2022. Crossref

  3. Li Linhao, Yang Xiufeng, Sohag Md M.A., Wang Xiaoliang, Liu Qingquan, SPH-ASR study of drop impact on a heated surface with consideration of inclined angle and evaporation, Engineering Analysis with Boundary Elements, 141, 2022. Crossref

  4. LI LinHao, YANG XiuFeng, SOHAG Md M. A., WANG XiaoLiang, LIU QingQuan, Simulation of two successive drops impacting a heated wall by smoothed particle hydrodynamics with adaptivespatial resolution, SCIENTIA SINICA Physica, Mechanica & Astronomica, 52, 10, 2022. Crossref

  5. Lee Jaeuk, Subedi Kshitiz Kumar, Huang Gordon W., Lee Jonghyun, Kong Song-Charng, Numerical Investigation of YSZ Droplet Impact on a Heated Wall for Thermal Spray Application, Journal of Thermal Spray Technology, 31, 7, 2022. Crossref

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