大分隔崖体周围水流上游湍流强度的统计推断

IF 2 3区 工程技术 Q3 MECHANICS Flow, Turbulence and Combustion Pub Date : 2024-08-10 DOI:10.1007/s10494-024-00573-z
Tom Moussie, Paolo Errante, Marcello Meldi
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引用次数: 0

摘要

采用数据驱动技术研究了矩形 5:1 气缸的空气动力学 Benchmarck,该技术是数值模拟和现有实验结果之间的桥梁。由于用于研究的工具的固有特征,特别是在设置和边界条件方面,在比较实验结果和数值结果时,在文献中发现了明显的差异。本文采用了一种基于集合卡尔曼滤波器的方法来优化数值计算中用作边界条件的合成湍流入口,以减少与现有实验结果之间的差异。数据驱动方法成功优化了边界条件特征,显著提高了流动预测的准确性。这些发现为分析边界条件复杂且通常未知的实际情况开辟了应用前景。
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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Statistical Inference of Upstream Turbulence Intensity for the Flow Around a Bluff Body with Massive Separation

The Benchmarck on the Aerodynamics of a Rectangular 5:1 Cylinder is studied using a data-driven technique which bridges numerical simulation and available experimental results. Because of intrinsic features of the tools used for investigation, in particular in terms of set-up and boundary conditions, significant discrepancies have been observed in the literature when comparing experimental and numerical results. An approach based on the Ensemble Kalman Filter is here used to optimize a synthetic turbulent inlet used as boundary condition in the numerical calculation, in order to reduce the discrepancy with the available experiments. The data-driven method successfully optimizes the boundary condition features, which produce a significant improvement of the accuracy in the prediction of the flow. These findings open perspectives of application towards the analysis of realistic cases, where boundary conditions are complex and usually unknown.

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来源期刊
Flow, Turbulence and Combustion
Flow, Turbulence and Combustion 工程技术-力学
CiteScore
5.70
自引率
8.30%
发文量
72
审稿时长
2 months
期刊介绍: Flow, Turbulence and Combustion provides a global forum for the publication of original and innovative research results that contribute to the solution of fundamental and applied problems encountered in single-phase, multi-phase and reacting flows, in both idealized and real systems. The scope of coverage encompasses topics in fluid dynamics, scalar transport, multi-physics interactions and flow control. From time to time the journal publishes Special or Theme Issues featuring invited articles. Contributions may report research that falls within the broad spectrum of analytical, computational and experimental methods. This includes research conducted in academia, industry and a variety of environmental and geophysical sectors. Turbulence, transition and associated phenomena are expected to play a significant role in the majority of studies reported, although non-turbulent flows, typical of those in micro-devices, would be regarded as falling within the scope covered. The emphasis is on originality, timeliness, quality and thematic fit, as exemplified by the title of the journal and the qualifications described above. Relevance to real-world problems and industrial applications are regarded as strengths.
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