Near-wall flow measurements using frequency-modulating filtered Rayleigh scattering (FM-FRS)

IF 2.3 3区工程技术 Q2 ENGINEERING, MECHANICAL

Experiments in Fluids Pub Date : 2025-01-31 DOI:10.1007/s00348-025-03974-6

Gwibo Byun, K. Todd Lowe, Michael Ellery, Joshua Sole

引用次数: 0

Abstract

The frequency-modulating filtered Rayleigh scattering (FM-FRS) technique has been developed and applied for the boundary layer measurements. The FM-FRS technique effectively extracts Rayleigh scattering information from noisy low-SNR signals caused by intense wall glare. The boundary layer velocity profiles measured by FM-FRS show excellent agreement with an independent pressure probe measurement and the law-of-the-wall, including approximately 100 μm above the wall. This technique is desirable for the practical applications of the Rayleigh scattering technique for flow diagnostics to regions that were limited due to strong background and low signal-to-noise ratio.

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利用调频滤波瑞利散射（FM-FRS）进行近壁流动测量

本文发展了调频滤波瑞利散射（FM-FRS）技术，并将其应用于边界层测量。FM-FRS技术能有效地从墙体强眩光引起的低信噪比噪声信号中提取瑞利散射信息。FM-FRS测量的边界层速度分布与独立压力探头测量结果和壁面规律吻合良好，包括壁面上方约100 μm处。该技术适用于瑞利散射技术在由于强背景和低信噪比而受到限制的区域进行流动诊断的实际应用。

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

Experiments in Fluids 工程技术-工程：机械

CiteScore

5.10

自引率

12.50%

发文量

157

审稿时长

3.8 months

期刊介绍： Experiments in Fluids examines the advancement, extension, and improvement of new techniques of flow measurement. The journal also publishes contributions that employ existing experimental techniques to gain an understanding of the underlying flow physics in the areas of turbulence, aerodynamics, hydrodynamics, convective heat transfer, combustion, turbomachinery, multi-phase flows, and chemical, biological and geological flows. In addition, readers will find papers that report on investigations combining experimental and analytical/numerical approaches.