Scale effects on the performance of sawtooth spoilers in transonic rectangular cavity flow

Date published

2015-12-11

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Publisher

Springer

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Article

ISSN

0723-4864

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Citation

Saddington A, Knowles K, Thangamani V. (2016) Scale effects on the performance of sawtooth spoilers in transonic rectangular cavity flow. Experiments in Fluids, Volume 57, Issue 2, January 2016, Article Number 2

Abstract

An experimental study was conducted on the effectiveness of sawtooth spoilers at suppressing acoustic tones within a rectangular cavity with a length-to-depth ratio of five and a width-to-depth ratio of two, operating at a freestream Mach number of 0.71. Whereas previous research has focussed on the ratio of spoiler height to boundary-layer thickness (h/δ), this study also considers the effect of the ratio of cavity length to boundary-layer thickness (L/δ). Using a combination of unsteady pressure measurements and particle image velocimetry, it was established that consideration of the magnitude of both parameters is important when designing passive control methods for transonic cavities. A correlation was developed which suggests that in order to suppress fully the cavity tones, a critical spoiler height, h cr, is defined such that h cr/δ = 0.065 ≤ L/δ ≤ 0.082.

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Software Description

Software Language

Github

Keywords

Particle Image Velocimetry, Shear Layer, Particle Image Velocimetry Measurement, Broadband Noise, Particle Image Velocimetry Data

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Attribution 4.0 International

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