Advanced Modelling of Flow and Heat Transfer in Rotating Disc Cavities Using Open-Source CFD

IF 1.4 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Ruonan Wang, Feng Gao, John W. Chew, Olaf Marxen, Zixiang Sun
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Abstract

Abstract Code_Saturne, an open-source computational fluid dynamics (CFD) code, has been applied to a range of problems related to turbomachinery internal air systems. These include a closed rotor-stator disc cavity, a co-rotating disc cavity with radial outflow and a co-rotating disc cavity with axial throughflow. Unsteady Reynolds-averaged Navier-Stokes (RANS) simulations and large eddy simulations (LES) are compared with experimental data and previous direct numerical simulation (DNS) and LES results. The results demonstrate Code_Saturne's capabilities for flow and heat transfer in rotating disc cavity flows. The Boussinesq approximation was implemented into the code for modelling centrifugally buoyant flow and heat transfer in the rotating cavity with axial throughflow. This development is validated using recent experimental data and CFD results. Good agreement is found between LES and RANS modelling in some cases, but for the axial throughflow cases, advantages of LES compared to URANS are significant for a high Reynolds number condition. The wall-modelled large eddy simulation (WMLES) method is recommended for balancing computational accuracy and cost in engineering applications.
基于开源CFD的旋转盘腔流动和传热高级建模
Code_Saturne是一个开源的计算流体动力学(CFD)代码,已被应用于一系列与涡轮机械内部空气系统相关的问题。这些包括封闭的转子-定子盘腔,具有径向流出的同旋转盘腔和具有轴向通流的同旋转盘腔。对非定常reynolds -average Navier-Stokes (RANS)模拟和大涡模拟(LES)进行了实验数据、直接数值模拟(DNS)和大涡模拟(LES)结果的比较。结果证明了Code_Saturne在旋转盘腔流动中的流动和传热能力。将Boussinesq近似实现到具有轴向通流的旋转腔内的离心浮力流动和传热模拟程序中。最近的实验数据和CFD结果验证了这一发展。在某些情况下,LES和RANS模型之间存在良好的一致性,但对于轴向通流情况,LES与URANS相比的优势在高雷诺数条件下是显着的。在工程应用中,为了平衡计算精度和成本,推荐采用壁型大涡模拟方法。
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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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