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Investigation of engine oil micro-droplets deposition using a round impinging jet

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Abstract

The impaction and deposition of engine oil micro-droplets (0.1–6 µm in diameter) injected from a round impinging jet on a cold flat plate has been studied numerically and experimentally. The effect of flow velocity, droplet size, H/D (distance between plate and impaction nozzle to the impaction nozzle diameter) on the impaction and deposition efficiencies were considered. Numerical simulation was performed with DPM (discrete phase method) and turbulent models of SST k-ω and RSM. To validate the numerical results, a special test rig was designed and constructed. The findings show that the SST k-ω model produces results that are more coherent with experimental results; impaction efficiency is significantly greater than deposition efficiency for lower Stokes numbers (smaller droplets) and the impaction and deposition efficiencies are maximum when the Stokes number is ≈1. This maximum peak is a function of physical parameters such as H/D and air flow rate.

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Authors and Affiliations

  1. Mechanical Engineering Department, Iran University of Science and Technology, Narmak, Tehran, Iran

    Mohammad Hassan Shojaeefard, Vahid Mousapour Khaneshan, Mohammad Reza Yosri & Ehsan Allymehr

  2. Mechanical Engineering Department, Qom University of Technology, Emam Sq., Khodakaram Boulevard, Qom, Iran

    Mohammad Ali Ehteram

  3. Multiphase Working Group, Iran Khodro Power Train Company(IPCO), Tehran-Karaj Special Road, Tehran, Iran

    Mohammad Ali Ehteram

Authors
  1. Mohammad Hassan Shojaeefard
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  2. Vahid Mousapour Khaneshan
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  3. Mohammad Reza Yosri
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  4. Mohammad Ali Ehteram
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  5. Ehsan Allymehr
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Correspondence to Vahid Mousapour Khaneshan.

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Technical Editor: Luis Fernando Figueira da Silva.

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Shojaeefard, M.H., Mousapour Khaneshan, V., Yosri, M.R. et al. Investigation of engine oil micro-droplets deposition using a round impinging jet. J Braz. Soc. Mech. Sci. Eng. 38, 721–734 (2016). https://doi.org/10.1007/s40430-015-0356-y

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  • DOI: https://doi.org/10.1007/s40430-015-0356-y

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