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首页> 外文期刊>RSC Advances >A thermal-fluid coupling numerical study on the characteristics of air-oil two phase flow and heat transfer in a micro UAV bearing chamber
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A thermal-fluid coupling numerical study on the characteristics of air-oil two phase flow and heat transfer in a micro UAV bearing chamber

机译：微无人机轴承室中空气油两相流动特性的热流体耦合数值研究

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摘要

Design of lubrication systems, particularly of bearing chambers, requires a sufficient understanding of the physical characteristics of the air-oil two phase flow. Due to a high shaft rotating speed of micro UAV (Unmanned Aerial Vehicle) engines, the heat production of bearings often results in a poor cooling effect on the bearings. In the present work, numerical simulation was conducted on the above topic for a certain type of UAV engine. Firstly, the heat production in the bearings was theoretically analysed, and a three dimensional structural model of the bearing chamber was built by Unigraphics (UG) software. Then on the FLUENT platform, some key physical fields, such as path lines, velocity and temperature distributions were presented and discussed, with the simulated results were verified by measured values under typical working conditions. Afterwards, the influences of some important operating conditions, including revolving speed, oil supply, and air inlet velocity were investigated. Finally, optimal values were suggested for each operating condition, taking into consideration the cooling effect, lubrication effect and engine efficiency.
机译：润滑系统的设计，特别是轴承室，需要足够了解气油两相流的物理特性。由于微免维（无人驾驶飞行器）发动机的高轴旋转速度，轴承的热量产生导致轴承的冷却效果不佳。在本作本作中，对某种类型的UAV发动机进行了上述主题进行了数值模拟。首先，理论上分析轴承中的热量，轴承室的三维结构模型由Unigraphics（UG）软件构建。然后在流利的平台上，提出并讨论了一些关键物理领域，例如路径线，速度和温度分布，通过测量值在典型的工作条件下验证模拟结果。然后，研究了一些重要的操作条件的影响，包括旋转速度，供油和空气入口速度。最后，考虑到冷却效果，润滑效应和发动机效率，提出了每种操作条件的最佳值。

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  • 来源
    《RSC Advances》 |2017年第70期|共7页
  • 作者

    Lu Peng; Zheng Xingwen; Li Wei; Yang Peijie; Huang Hulin; Yu Yezhen;

  • 作者单位

    Nanjing Univ Aeronaut &

    Astronaut Key Lab Thermal Environm &

    Thermal Struct Minist Ind &

    Informat Technol Jiangsu Prov Key Lab Aerosp Power Syst Coll Energ Nanjing 210016 Jiangsu Peoples R China;

    Nanjing Univ Aeronaut &

    Astronaut Key Lab Thermal Environm &

    Thermal Struct Minist Ind &

    Informat Technol Jiangsu Prov Key Lab Aerosp Power Syst Coll Energ Nanjing 210016 Jiangsu Peoples R China;

    Nanjing Univ Aeronaut &

    Astronaut Key Lab Thermal Environm &

    Thermal Struct Minist Ind &

    Informat Technol Jiangsu Prov Key Lab Aerosp Power Syst Coll Energ Nanjing 210016 Jiangsu Peoples R China;

    Nanjing Univ Aeronaut &

    Astronaut Key Lab Thermal Environm &

    Thermal Struct Minist Ind &

    Informat Technol Jiangsu Prov Key Lab Aerosp Power Syst Coll Energ Nanjing 210016 Jiangsu Peoples R China;

    Nanjing Univ Aeronaut &

    Astronaut Coll Astronaut Nanjing 210016 Jiangsu Peoples R China;

    Nanjing Normal Univ Sch Energy &

    Mech Engn Nanjing 210042 Jiangsu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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