DEVELOPMENT OF A LOW-NOx SWIRL BURNER FOR GASEOUS FUELS

Spangelo, Øystein; Slungaard, T.; Engebretsen, T.; Sønju, O. K.

doi:10.1615/interjenercleanenv.v7.i3.20

Cited by 3 publications

(3 citation statements)

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“…Hava ve yakıtın karışımının hızlı gerçekleşmesi ve yanmanın daha kararlı olabilmesi için girdap üreteçli yakıcılar tasarlanmıştır [18]. Tasarım şeması Şekil 2'de gösterilmiştir.…”

Section: Girdap üReteci (Swirl)unclassified

Investigation Of Combustion Characteristics Of Propane Gas At Swirl Number Variations In A Premixed Model Combustor

SIPÇIK,

TAŞTAN

2023

Fırat Üniversitesi Mühendislik Bilimleri Dergisi

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Çalışmamızda swirl sayısı değişimlerine verdiği tepkileri incelemek için propan gazı 0,4/0,8/1,2/1,6 swirl sayılarında yakılmıştır. Yanma sonucu oluşan alevin sıcaklık değeri, baca gazı sıcaklık değeri, emisyon değerleri, ışık şiddeti ve dinamik basınç değişimleri incelenmiştir. En yüksek sıcaklık 0,8 swirl’de, en düşük sıcaklık ise 1,2 swirl’de ölçülmüştür. Eksenel mesafede ölçülen sıcaklık trendlerinde, 0,2-0,8 swirl sayıları arasında, swirl sayısı arttıkça sıcaklık düşmüş, ancak 1,2 ve 1,6 swirl sayıları arasında sıcaklık 1,6’da daha yüksek ölçülmüştür. Swirl sayısının değişimi baca gazı sıcaklık değerlerini büyük oranlarda değiştirmemiştir. Swirl sayısının artışı ile CO, CO2 NOx emisyonları azalmıştır. NOx emisyonları için bu çalışmada kullanılan ölçü cihazının tolerans değerlerinde verimli sonuçlar elde edilememekle birlikte, yapılan çalışma ile, NOx emisyonundaki değişimin, NOx oluşum mekanizmalarıyla mı yoksa swirl sayısı değişim etkisinden mi kaynaklandığı net olarak açıklanamamıştır. Swirl sayısının artması, propan alevinin ışık şiddetini düşürdüğü ve belirli bir seviyede düşük tuttuğu gözlenmiştir ancak alevin dinamik basıncı üzerinde ciddi etki yaratmamıştır.

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Section: Girdap üReteci (Swirl)unclassified

Investigation Of Combustion Characteristics Of Propane Gas At Swirl Number Variations In A Premixed Model Combustor

SIPÇIK,

TAŞTAN

2023

Fırat Üniversitesi Mühendislik Bilimleri Dergisi

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“…The partially premixed bluff body (PPBB) burner investigated in the present study was originally designed by Spangelo et al 8 for the combustion of propane and natural gas. However, its design features allow for a wide fuel flexibility and make it therefore also an ideal candidate for the combustion of hydrogen and hydrogen-rich fuels.…”

Section: Introductionmentioning

confidence: 99%

Combustion and NO_x Emission Characteristics of a Bluff Body Hydrogen Burner

Meraner

Ditaranto

et al. 2019

Energy Fuels

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Nitric oxide (NO x ) emissions from a partial premixed bluff body (PPBB) hydrogen burner under varying operational conditions have been investigated numerically. The PPBB burner employs a conical bluff body to stabilize the flame, and its design allows for the dilution of the fuel–air mixture by internally recirculated flue gas. The degree of premixing can be adjusted via primary and secondary fuel ports that are controlled independently. Steady-state computational fluid dynamic (CFD) simulations were conducted for 12 different combinations of secondary fuel fractions and thermal loads to investigate the complex flow structure in the burner and the source of NO x formation. All simulations were validated against experimental data and underpredicted NO x emissions by 7% on average. A detailed analysis of the combustion characteristics was conducted and showed that primary fuel is burned in a multiregime mode at a wide range of mixture fractions/equivalence ratios, while secondary fuel is burned closer to stoichiometry. Utilizing a secondary fuel fraction of 30% (i.e., the base operational condition) leads to a fuel-rich mixture within the inner recirculation zone compared to a fuel-lean mixture when the burner is operated without secondary fuel. The concave mean curvature of the stoichiometric isosurface between primary and secondary fuel leads furthermore to a local peak of the NO x formation rate when the burner operates at its base conditions. The analysis of the mass flow rates in the inner and outer recirculation zones showed that increasing the thermal load reduces the amount of internally recirculated flue gas. The conducted simulations indicate that these effects contribute to an increase in NO x emissions with increasing thermal load and with increasing secondary fuel fraction.

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“…In order to avoid these issues associated with premixed swirl burners, Spangelo et al [20] developed and patented a novel partially premixed bluff body burner (PPBB burner) that aims to ensure stable combustion with low NO x emissions across a wide range of hydrogen concentrations. The PPBB burner combines advanced mixing techniques with burner generated internal flue gas recirculation (IFGR), which is sometimes referred to as furnace gas recirculation.…”

Section: Introductionmentioning

confidence: 99%

Cold flow characteristics of a novel bluff body hydrogen burner

Meraner

Ditaranto

et al. 2018

International Journal of Hydrogen Energy

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The cold flow characteristics of a novel partial premixed bluff body (PPBB) low NO x burner, capable of operating with hydrogen as well as methanehydrogen blends, were investigated numerically. The PPBB burner features a frustum shaped conical bluff body generating a flame stabilizing recirculation zone. Fuel is partially premixed via jets in an accelerating cross-flow. Steadystate and transient non-reacting simulations using five different turbulence models, i.e. standard k-, realizable k-, shear stress transport (SST) kω, stress-blended eddy simulation (SBES) and large eddy simulation (LES), were conducted. The simulations were validated against particle image velocimetry (PIV) measurements of an unconfined non-reacting flow. All turbulent models were able to predict the recirculation zone length in good agreement with the experimental data. However, only scale resolving simulations could reproduce velocity magnitudes with sufficient accuracy. Time averaged and instantaneous results from the scale resolving simulation were

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DEVELOPMENT OF A LOW-NOx SWIRL BURNER FOR GASEOUS FUELS

Cited by 3 publications

References 0 publications

Investigation Of Combustion Characteristics Of Propane Gas At Swirl Number Variations In A Premixed Model Combustor

Investigation Of Combustion Characteristics Of Propane Gas At Swirl Number Variations In A Premixed Model Combustor

Combustion and NO_x Emission Characteristics of a Bluff Body Hydrogen Burner

Cold flow characteristics of a novel bluff body hydrogen burner

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DEVELOPMENT OF A LOW-NOx SWIRL BURNER FOR GASEOUS FUELS

Cited by 3 publications

References 0 publications

Investigation Of Combustion Characteristics Of Propane Gas At Swirl Number Variations In A Premixed Model Combustor

Investigation Of Combustion Characteristics Of Propane Gas At Swirl Number Variations In A Premixed Model Combustor

Combustion and NOx Emission Characteristics of a Bluff Body Hydrogen Burner

Cold flow characteristics of a novel bluff body hydrogen burner

Contact Info

Product

Resources

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Combustion and NO_x Emission Characteristics of a Bluff Body Hydrogen Burner