面向新能源转型挑战的可倾垫滑动轴承CFD参数化建模

IF 1.4 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Edoardo Gheller, Vishnu Vardhan Reddy, Satish Koyyalamudi, Steven Chatterton, Daniele Panara, Paolo Pennacchi
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引用次数: 0

摘要

提高效率和减少机器碳足迹的必要性,推动离心压缩机轴承设计向更高的外围转速和更低的油耗方向发展,特别是在新能源转型领域,导致轴承温度升高。因此,轴承热管理开始在延长机器的可操作性和减少维护频率方面发挥重要作用。为了解决油膜轴承的温度问题,建立了可倾垫滑动轴承的全三维参数共轭传热计算流体动力学模型。模型的参数化几何和自动网格更新,使得在不采用任何动态网格算法的情况下即可获得平衡位置搜索。倾斜垫和转轴的平衡位置由牛顿-拉夫逊算法自动计算。研究了不同轴颈直径、轴承间隙和工作条件下TPJB的静态性能。将数值计算结果与压缩机机械运行试验数据进行了比较,验证了模型的可靠性。CFD模型给出的油压、速度和温度的三维分布可以进行局部优化,以应对新的能源转型挑战。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Tilting Pad Journal Bearing CFD Parametric Modeling for New Energy Transition Challenges
Abstract The necessity of increasing the efficiency and reducing the carbon foot-print of machines is pushing centrifugal compressor bearings design to higher and higher peripheral speed and lower oil consumptions especially in the new energy transition fields, resulting in an increase in the bearing temperatures. Therefore, the bearing thermal management starts to play a major role in extending the machine operability and reducing the maintenance frequency. A full three-dimensional (3D) parametric conjugate heat transfer Computational Fluid Dynamic (CFD) model for Tilting Pad Journal Bearings (TPJBs) is introduced in this paper to address the temperature aspects of oil-film bearings. The parametric geometry of the model and the automatic mesh update, allow the equilibrium position search to be obtained without adopting any dynamic mesh algorithms. The tilting pad and rotating shaft equilibrium position is automatically calculated with a Newton-Raphson algorithm. The static performance of the TPJB is investigated for different journal diameters, bearing clearance, and operating conditions. The numerical results obtained are compared with experimental data from Compressor Mechanical Running Tests to demonstrate the reliability of the model presented. The 3D distributions of the oil pressure, velocity and temperature given by the CFD model, can be locally optimized to face the new energy transition challenges.
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来源期刊
CiteScore
3.80
自引率
20.00%
发文量
292
审稿时长
2.0 months
期刊介绍: The ASME Journal of Engineering for Gas Turbines and Power publishes archival-quality papers in the areas of gas and steam turbine technology, nuclear engineering, internal combustion engines, and fossil power generation. It covers a broad spectrum of practical topics of interest to industry. Subject areas covered include: thermodynamics; fluid mechanics; heat transfer; and modeling; propulsion and power generation components and systems; combustion, fuels, and emissions; nuclear reactor systems and components; thermal hydraulics; heat exchangers; nuclear fuel technology and waste management; I. C. engines for marine, rail, and power generation; steam and hydro power generation; advanced cycles for fossil energy generation; pollution control and environmental effects.
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