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Home / Journal of the American Helicopter Society, Volume 30, Number 4

Transonic Rotor Flow‐Measurement Technique Using Holographic Interferometry

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Authors: Kittleson, John K.; Yu, Yung H.

Source: Journal of the American Helicopter Society, Volume 30, Number 4, 1 October 1985, pp. 3-10(8)

Publisher: Vertical Flight Society

DOI: https://doi.org/10.4050/JAHS.30.4.3

Holographic interferometry is used to record interferograms of the flow near a hovering transonic rotor blade. A pulsed ruby laser recorded 40 interferograms with a 2‐ft‐diam view field near the model rotor‐blade tip operating at a tip Mach number of 0.90. This paper presents the experimental procedure and example interferograms recorded in the rotor's tip‐path‐plane. In addition, a method currently being pursued to obtain quantitative flow informstion using computer‐assisted tomography (CAT) with the holographic interferogram data, is outlined.

Document Type: Research Article

Publication date: 01 October 1985

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  • The Journal of the AHS is the world's only scientific journal dedicated to vertical flight technology. It is a peer-reviewed technical journal published quarterly by The Vertical Flight Society and presents innovative papers covering the state-of-the-art in all disciplines of VTOL design, research and development. (Please note that VFS members receive significant discounts on articles and subscriptions.)

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