用DIT测量PSP旋翼前飞边界层转捩

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-05-10 DOI:10.4050/JAHS.66.022008

A. Gardner, A. Weiss, J. Heineck, A. Overmeyer, H. Spooner, Dr. R. K. Jain, C. Wolf, M. Raffel

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引用次数: 2

摘要

给出了一种具有边界层过渡的直升机主旋翼前飞计算流体动力学和综合代码验证的良好定义的参考数据集。在NASA Langley 14 × 22英尺亚音速隧道中，利用差示红外热像仪(DIT)对NASA/陆军“PSP旋翼”的顶部(吸力)侧进行了边界层过渡测量。试验采用FLIR X8500 SLS长波红外摄像机对三叶旋翼进行观测。在向前飞行时，边界层跃迁的超前比为0.3 (115 kt)。实测的边界层过渡位置与之前的测量和预测的边界层过渡位置一致。本文提出了一种旋翼前飞DIT图像分析方法，并通过对不同进流条件下俯仰翼型的计算分析验证了该方法的有效性，结果表明该方法在定性和定量上都与实验数据相似。

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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Boundary Layer Transition Measured by DIT on the PSP Rotor in Forward Flight

A well-defined reference set of data for computational fluid dynamics and comprehensive code validation for a scaled helicopter main rotor with boundary layer transition in forward flight is presented. The boundary layer transition was measured using differential infrared thermography (DIT) on the top (suction) side of the NASA/Army “PSP rotor” in the NASA Langley 14-by-22-Foot Subsonic Tunnel. The tests used a FLIR X8500 SLS long-wave infrared camera to observe the three-bladed rotor. The boundary layer transition was detected for forward flight at an advance ratio of 0.3 (115 kt). The measured boundary layer transition positions are consistent with previous measurements and predicted boundary layer transition locations. A method for the analysis of DIT images for a rotor in forward flight is shown and validated based on computational analysis of a pitching airfoil with varying inflow, showing both qualitative and quantitative similarity to experimental data.

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来源期刊

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.