Analysis of the swirl number in a radial swirler

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Abstract

In this study, we investigated the isothermal swirling flow at the exit of a model burner with a radial vane swirler. Velocity profiles were measured with varying guide vane angle and Reynolds number using a laser Doppler anemometer. Various definitions of the integral swirl number are considered, including their correlation with the geometric swirl number and the simple ratio of the maximum velocities in the profile is shown. It was found that at Sp>0.6, this correlation ceases to exist and a central recirculation zone and a precessing vortex core occur in the flow at the nozzle exit. The distributions of the mean and pulsation velocities and pressure pulsations with varying guide vane angle are given. Self-similarity of the velocity profiles with varying Reynolds numbers is shown. The Strouhal number exhibits a nonlinear dependence on the swirl number.

Original languageEnglish
Title of host publicationHeat and Mass Transfer and Hydrodynamics in Swirling Flows, HMTHSF 2019
Subtitle of host publicationProceedings of the 7th International Conference
EditorsAlexander I. Leontiev, Yuriy A. Kuzma-Kichta, Shota A. Piralishvili, Sergey V. Veretennikov, Oleg A. Evdokimov
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735419629
DOIs
Publication statusPublished - 31 Mar 2020
Event7th International Conference on Heat and Mass Transfer and Hydrodynamics in Swirling Flows, HMTHSF 2019 - Rybinsk, Russian Federation
Duration: 16 Oct 201918 Oct 2019

Publication series

NameAIP Conference Proceedings
Volume2211
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference7th International Conference on Heat and Mass Transfer and Hydrodynamics in Swirling Flows, HMTHSF 2019
CountryRussian Federation
CityRybinsk
Period16.10.201918.10.2019

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