A comparative study of the effect of varied reaction environments on a swirl stabilized flame geometry via optical measurements

Banyon, Colin; Rodríguez-Henríquez, José J.; Paterakis, George; Malliotakis, Zisis; Souflas, Konstantinos; Keramiotis, Christos; Vourliotakis, George; Mauß, Fabian; Curran, Henry J.; Skevis, G.; Koutmos, P.; Founti, M.

doi:10.1016/j.fuel.2017.09.105

Cited by 6 publications

(1 citation statement)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, by investigating the effect of fuel type on CH* topology on the stratified and premixed flames, Figure 7-22, it is evident that the behavior of the methane flame structure is analogous to the propane one for all baffle cases, [142].…”

Section: Chemiluminescence Imagingmentioning

confidence: 99%

Experimental investigation of isothermal and reacting flow characteristics downstream of axisymmetric bluff body stabilizers under stratified or fully premixed inlet mixture conditions

Paterakis¹,

Πατεράκης²

View full text Add to dashboard Cite

The current work describes an experimental investigation of isothermal and turbulent reacting flow field characteristics downstream of axisymmetric bluff body stabilizers under a variety of inlet mixture conditions. Fully premixed and stratified flames established downstream of this double cavity premixer/burner configuration were measured and assessed under lean and ultra-lean operating conditions. The aim of this thesis was to further comprehend the impact of stratifying the inlet fuelair mixture on the reacting wake characteristics for a range of practical stabilizers under a variety of inlet fuel-air settings. In the first part of this thesis, the isothermal mean and turbulent flow features downstream of a variety of axisymmetric baffles was initially examined. The effect of different shapes, (cone or disk), blockage ratios, (0.23 and 0.48), and rim thicknesses of these baffles was assessed. The variations of the recirculation zones, back flow velocity magnitude, annular jet ejection angles, wake development, entrainment efficiency, as well as several turbulent flow features were obtained, evaluated and appraised. Next, a comparative examination of the counterpart turbulent cold fuel-air mixing performance and characteristics of stratified against fully-premixed operation was performed for a wide range of baffle geometries and inlet mixture conditions. Scalar mixing and entrainment properties were investigated at the exit plane, at the bluff body annular shear layer, at the reattachment region and along the developing wake were investigated. These isothermal studies provided the necessary background information for clarifying the combustion properties and interpreting the trends in the counterpart turbulent reacting fields. Subsequently, for selected bluff bodies, flame structures and behavior for operation with a variety of reacting conditions were demonstrated. The effect of inlet fuel-air mixture settings, fuel type and bluff body geometry on wake development, flame shape, anchoring and structure, temperatures and combustion efficiencies, over lean and close to blow-off conditions, was presented and analyzed. For the obtained measurements infrared radiation, particle image velocimetry, laser doppler velocimetry, chemiluminescence imaging set-ups, together with Fouriertransform infrared spectroscopy, thermocouples and global emission analyzer instrumentation was employed. This helped to delineate a number of factors that affectcold flow fuel-air mixing, flame anchoring topologies, wake structure development and overall burner performance. The presented data will also significantly assist the validation of computational methodologies for combusting flows and the development of turbulence-chemistry interaction models.

show abstract

Section: Chemiluminescence Imagingmentioning

confidence: 99%

Experimental investigation of isothermal and reacting flow characteristics downstream of axisymmetric bluff body stabilizers under stratified or fully premixed inlet mixture conditions

Paterakis¹,

Πατεράκης²

View full text Add to dashboard Cite

show abstract

Effects of Stratification and Preheat on Turbulent Flame Characteristics and Stabilization

Souflas

Koutmos

2021

Flow Turbulence Combust

View full text Add to dashboard Cite

Experimental verification of three-dimensional temperature field reconstruction method based on Lucy-Richardson and nearest neighbor filtering joint deconvolution algorithm for flame light field imaging

Yuan

Zhang

et al. 2019

Applied Thermal Engineering

View full text Add to dashboard Cite

A comparative study of the effect of varied reaction environments on a swirl stabilized flame geometry via optical measurements

Cited by 6 publications

References 50 publications

Experimental investigation of isothermal and reacting flow characteristics downstream of axisymmetric bluff body stabilizers under stratified or fully premixed inlet mixture conditions

Experimental investigation of isothermal and reacting flow characteristics downstream of axisymmetric bluff body stabilizers under stratified or fully premixed inlet mixture conditions

Effects of Stratification and Preheat on Turbulent Flame Characteristics and Stabilization

Experimental verification of three-dimensional temperature field reconstruction method based on Lucy-Richardson and nearest neighbor filtering joint deconvolution algorithm for flame light field imaging

Contact Info

Product

Resources

About