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Surge Flow in a Centrifugal Compressor Measured by Digital Particle Image Velocimetry (2000)

Wernet, Mark P.

In: CASI

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Publication Date: 2018-06-05

Description: A planar optical velocity measurement technique known as Particle Image Velocimetry (PIV) is being used to study transient events in compressors. In PIV, a pulsed laser light sheet is used to record the positions of particles entrained in a fluid at two instances in time across a planar region of the flow. Determining the recorded particle displacement between exposures yields an instantaneous velocity vector map across the illuminated plane. Detailed flow mappings obtained using PIV in high-speed rotating turbomachinery components are used to improve the accuracy of computational fluid dynamics (CFD) simulations, which in turn, are used to guide advances in state-of-the-art aircraft engine hardware designs.

Keywords: Aircraft Propulsion and Power

Type: Research and Technology 1999; NASA/TM-2000-209639

Format: application/pdf

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