Direct multi-fidelity integration of 3D CFD models in a gas turbine with numerical zooming method

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Weimin Deng, Zuojun Wei, Ming Ni, Haotian Gao, Guangming Ren
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引用次数: 0

Abstract

Multi-fidelity simulation improves the simulation accuracy and captures more detailed information about aero engines under limited computing resources, which is implemented by coupling different levels of models using numerical zooming methods. However, there is an obvious problem in traditional zooming methods such as the iterative coupled zooming method or mini-map method: both the convergence and accuracy depend highly on the component general characteristic maps. Based on the investigation of a micro gas turbine, a direct zooming method (Cycle with CFD in it, CWCFD) is developed. It directly embeds the 3D CFD compressor and turbine model into a 0D component-level model without component general characteristic maps. Then, the CWCFD zooming method is compared with the traditional 0D component-level model in terms of the throttle characteristics of the micro gas turbine, and the experimental data of the ground test is performed to verify the effectiveness of the CWCFD zooming methods. The results indicate that the CWCFD zooming method matches well with the test data better than the traditional 0D component-level model.
用数值缩放法直接多保真度集成燃气轮机中的 3D CFD 模型
在有限的计算资源条件下,多保真度仿真可提高仿真精度并获取航空发动机的更多详细信息,其实现方法是使用数值缩放方法将不同层次的模型耦合起来。然而,迭代耦合缩放法或微型图法等传统缩放方法存在一个明显的问题:收敛性和精度都高度依赖于组件的通用特征图。基于对微型燃气轮机的研究,我们开发了一种直接放大法(Cycle with CFD in it,CWCFD)。它将三维 CFD 压缩机和涡轮机模型直接嵌入到不带部件通用特性图的 0D 部件级模型中。然后,就微型燃气轮机的节流特性对 CWCFD 缩放方法与传统的 0D 组件级模型进行了比较,并通过地面试验数据验证了 CWCFD 缩放方法的有效性。结果表明,与传统的 0D 组件级模型相比,CWCFD 缩放方法与试验数据的匹配性更好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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