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Proceedings Paper

Holographic Flow Visualisation Applied To Very Small Flow Sections In Turbomachinery Research
Author(s): R. J. Parker; J. B. Brownell
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Paper Abstract

Holographic flow visualisation has been successfully employed by Rolls-Royce to investigate three dimensional flows in rotating aero-engine fans and two dimensional flows in cascades of blades in wind tunnels. In a development of the latter technique, flow fields in life-size models of labyrinth seals have been investigated. These tiny components are used to block gas flow between rotating and stationary parts of the engine without physical contact. The models are typically 20mm across with gaps of less than 0.5mm. Careful design of the optical system and the use of broad-band reconstruction techniques minimise the deleterious effects of diffraction and laser speckle. High resolution interferograms of the complicated flow field can be achieved. The paper discusses the optical system and presents examples of the holographic reconstructions.

Paper Details

Date Published: 16 July 1986
PDF: 9 pages
Proc. SPIE 0599, Optics in Engineering Measurement, (16 July 1986); doi: 10.1117/12.952361
Show Author Affiliations
R. J. Parker, Rolls-Royce Ltd. (United Kingdom)
J. B. Brownell, Rolls-Royce Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 0599:
Optics in Engineering Measurement
William F. Fagan, Editor(s)

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