Oil-Film interferometry measurement of skin friction - analysis summary and description of Matlab program

20th International Congress on Instrumentation in Aerospace Simulation Facilities, 2003. ICIASF '03. Pub Date : 2003-08-25 DOI:10.1109/ICIASF.2003.1274866

J. Naughton, J. Robinson, V. Durgesh

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引用次数: 13

Abstract

The measurement of wall shear stress is increasingly recognized as a critical element of aerodynamic testing. Wall shear stress is necessary to characterize fully a wall-bounded flow, to provide critical information necessary for computational simulations, and to serve as a sensitive quantity for use in flow-control applications. Oil-film interferometry is a method that can be used to measure wall shear stress quickly and accurately, but the analysis of the interferograms is complex and has limited the methods use. OILFILMTOOL is a Matlab program that has been developed to simplify the analysis process. The analysis steps required to determine wall shear stress from an interferogram obtained using oil-film interferometry are discussed, and those methods currently implemented in OILFILMTOOL are highlighted. The application of OILFILMTOOL to interferograms acquired on the surface of a wedge body is discussed. It is hoped that, by implementing the complex analysis process in a simple-to-use program, the use of oil-film interferometry in aerodynamic test facilities will become more widespread.

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油膜干涉法测量皮肤摩擦-分析总结和描述Matlab程序

壁面剪切应力的测量越来越被认为是气动测试的一个重要组成部分。壁面剪切应力是充分表征壁面有界流动的必要条件，为计算模拟提供必要的关键信息，并作为流动控制应用中使用的敏感量。油膜干涉法是一种能够快速、准确地测量管壁剪切应力的方法，但干涉图的分析复杂，限制了该方法的应用。OILFILMTOOL是一个Matlab程序，已开发，以简化分析过程。讨论了从使用油膜干涉法获得的干涉图中确定壁面剪切应力所需的分析步骤，并重点介绍了目前在OILFILMTOOL中实现的方法。讨论了利用OILFILMTOOL对楔形体表面干涉图进行处理的方法。希望通过在一个简单易用的程序中实现复杂的分析过程，油膜干涉测量在气动测试设施中的应用将得到更广泛的应用。

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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20th International Congress on Instrumentation in Aerospace Simulation Facilities, 2003. ICIASF '03.

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