Supersonic jet impingement on a cylindrical surface

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Abstract

A supersonic jet at an NPR of 3.6 impinging upon a cylindrical section at z/D = 3.5 is investigated using particle image velocimetry. POD illustrates that a stationary flapping mode dominates the flow, containing ≈ 40% of the specific kinetic energy. Instantaneous measurements show acoustic waves propagating in the entrainment field. Based on the separation of these waves and an estimated wave speed of 332.5m/s, a frequency estimation of 8240Hz is obtained, which compares well to the microphone measurement of 8301Hz. A phase average is used to determine the convective velocity of the coherent structures. A range of 0.42-0.54Uj is obtained and the velocity used to estimate the sound source location, with good agreement with previous research.

Original languageEnglish
Title of host publication22nd AIAA/CEAS Aeroacoustics Conference
Subtitle of host publicationLyon, France, 30 May - 1 June, 2016
PublisherAmerican Institute of Aeronautics and Astronautics
Number of pages13
ISBN (Electronic)9781624103865
DOIs
Publication statusPublished - 2016
EventAIAA/CEAS Aeroacoustics Conference 2016 - Lyon, France
Duration: 30 May 20161 Jun 2016
Conference number: 22nd
https://arc.aiaa.org/doi/book/10.2514/MAERO16

Conference

ConferenceAIAA/CEAS Aeroacoustics Conference 2016
Country/TerritoryFrance
CityLyon
Period30/05/161/06/16
Internet address

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