Measurement of turbulent kinetic energy spectrum - Part 2: Convection record measurements

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Abstract

A novel exact temporal to spatial mapping for point measurements in turbulence has been applied to various flow conditions existing in a round turbulent jet. The conditions range between equilibrium and non-equilibrium as well as mid to high turbulence intensities. The exact mapping applies to all flows, including high intensity non-equilibrium flows, since it is based on the instantaneous velocity magnitude, thereby incorporating all relevant aspects of the flow dynamics. Devel-opment of the jet turbulence along the stream, from non-equilibrium to equilibrium, is observed. In the developed region of the jet, Taylor’s hypothesis is tested and the spectra using the novel exact mapping is validated with excellent agreement against directly measured spatial spectra in a mapped similarity space using PIV. The method is observed to produce the expected results even at turbulence intensi-ties of the order of 450%.
Original languageEnglish
Title of host publicationProgress in Turbulence and Wind Energy VII - Proceedings of the iTi Conference in Turbulence 2016
EditorsJ. Peinke, G. Kampers, M. Oberlack, M. Waclawczyk, A. Talamelli
PublisherSpringer
Publication date2017
Pages171-176
ISBN (Print)978-3-319-57933-7
ISBN (Electronic)978-3-319-57934-4
DOIs
Publication statusPublished - 2017
EventiTi Conference on Turbulence VII - Bertinoro, Italy
Duration: 7 Sep 20169 Sep 2016

Conference

ConferenceiTi Conference on Turbulence VII
CountryItaly
CityBertinoro
Period07/09/201609/09/2016
SeriesSpringer Proceedings in Physics
ISSN0930-8989

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