A Study of Recirculating Flow Fields Downstream of a Diverse Range of Axisymmetric Bluff Body Geometries Suitable for Flame Stabilization

This work investigates the non-reacting time averaged and fluctuating flow field characteristics downstream of a variety of axisymmetric baffles, operating in combination with an upstream double-cavity premixer arrangement. The study aims to broaden knowledge with respect to the impact of different...

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Autores principales:	Georgios Paterakis, Konstantinos Souflas, Andreas Naxakis, Panayiotis Koutmos
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	central recirculation zone bluff body stabilizers PIV turbulent flow fields Motor vehicles. Aeronautics. Astronautics TL1-4050
Acceso en línea:	https://doaj.org/article/2afa76d883a7413f85c112bbfdb06de5
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spelling	oai:doaj.org-article:2afa76d883a7413f85c112bbfdb06de52021-11-25T15:57:39ZA Study of Recirculating Flow Fields Downstream of a Diverse Range of Axisymmetric Bluff Body Geometries Suitable for Flame Stabilization10.3390/aerospace81103392226-4310https://doaj.org/article/2afa76d883a7413f85c112bbfdb06de52021-11-01T00:00:00Zhttps://www.mdpi.com/2226-4310/8/11/339https://doaj.org/toc/2226-4310This work investigates the non-reacting time averaged and fluctuating flow field characteristics downstream of a variety of axisymmetric baffles, operating in combination with an upstream double-cavity premixer arrangement. The study aims to broaden knowledge with respect to the impact of different bluff body shapes, leading and trailing edge flow contours, blockage ratios and incoming flow profiles impinging on the bluff body, on the development and properties of the downstream recirculating wake. Particle Image Velocimetry (PIV) measurements have been employed to obtain the mean and turbulent velocity fields throughout the centrally located recirculation zone and the adjacent developing toroidal shear layer. The results are helpful in demarcating the cold flow structure variations in the near wake of the examined baffles which support and, to some extent, determine the flame anchoring performance and heat release disposition in counterpart reacting configurations. Additionally, such results could also assist in the selection of the most suitable flame stabilization configuration for fuels possessing challenging combustion behavior such as multi-component heavier hydrocarbons, biofuels, or hydrogen blends.Georgios PaterakisKonstantinos SouflasAndreas NaxakisPanayiotis KoutmosMDPI AGarticlecentral recirculation zonebluff body stabilizersPIVturbulent flow fieldsMotor vehicles. Aeronautics. AstronauticsTL1-4050ENAerospace, Vol 8, Iss 339, p 339 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	central recirculation zone bluff body stabilizers PIV turbulent flow fields Motor vehicles. Aeronautics. Astronautics TL1-4050
spellingShingle	central recirculation zone bluff body stabilizers PIV turbulent flow fields Motor vehicles. Aeronautics. Astronautics TL1-4050 Georgios Paterakis Konstantinos Souflas Andreas Naxakis Panayiotis Koutmos A Study of Recirculating Flow Fields Downstream of a Diverse Range of Axisymmetric Bluff Body Geometries Suitable for Flame Stabilization
description	This work investigates the non-reacting time averaged and fluctuating flow field characteristics downstream of a variety of axisymmetric baffles, operating in combination with an upstream double-cavity premixer arrangement. The study aims to broaden knowledge with respect to the impact of different bluff body shapes, leading and trailing edge flow contours, blockage ratios and incoming flow profiles impinging on the bluff body, on the development and properties of the downstream recirculating wake. Particle Image Velocimetry (PIV) measurements have been employed to obtain the mean and turbulent velocity fields throughout the centrally located recirculation zone and the adjacent developing toroidal shear layer. The results are helpful in demarcating the cold flow structure variations in the near wake of the examined baffles which support and, to some extent, determine the flame anchoring performance and heat release disposition in counterpart reacting configurations. Additionally, such results could also assist in the selection of the most suitable flame stabilization configuration for fuels possessing challenging combustion behavior such as multi-component heavier hydrocarbons, biofuels, or hydrogen blends.
format	article
author	Georgios Paterakis Konstantinos Souflas Andreas Naxakis Panayiotis Koutmos
author_facet	Georgios Paterakis Konstantinos Souflas Andreas Naxakis Panayiotis Koutmos
author_sort	Georgios Paterakis
title	A Study of Recirculating Flow Fields Downstream of a Diverse Range of Axisymmetric Bluff Body Geometries Suitable for Flame Stabilization
title_short	A Study of Recirculating Flow Fields Downstream of a Diverse Range of Axisymmetric Bluff Body Geometries Suitable for Flame Stabilization
title_full	A Study of Recirculating Flow Fields Downstream of a Diverse Range of Axisymmetric Bluff Body Geometries Suitable for Flame Stabilization
title_fullStr	A Study of Recirculating Flow Fields Downstream of a Diverse Range of Axisymmetric Bluff Body Geometries Suitable for Flame Stabilization
title_full_unstemmed	A Study of Recirculating Flow Fields Downstream of a Diverse Range of Axisymmetric Bluff Body Geometries Suitable for Flame Stabilization
title_sort	study of recirculating flow fields downstream of a diverse range of axisymmetric bluff body geometries suitable for flame stabilization
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2afa76d883a7413f85c112bbfdb06de5
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A Study of Recirculating Flow Fields Downstream of a Diverse Range of Axisymmetric Bluff Body Geometries Suitable for Flame Stabilization

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