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Showing 1 to 12 of 12 for “"Spray Flames"”.
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Structure and stabilization of cryogenic spray flames
… progression to more complex geometries. The flames above a porous plate with fuel injection and then above a vaporizing reactant are considered. Finally, the situation of a flame behind a step over a vaporizing reactant is analysed. This is a realistic model of the base of a cyrogenic spray …
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Ignition and propagation mechanisms of spray flames
… analysis of the phases of ignition in sprays is carried out in a controlled, well-characterised experiment: the initiation of a spherically expanding flame in a turbulent droplet-laden jet by a laser spark. A revision of definitions of ignition-related terms is proposed based on a …
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Simulating Extinction and Blow-off in Kerosene Swirl Spray Flames
… are still not well-understood for conventional spray flames, but alternative fuels provide additional challenges as they have been observed to have increased variability from expected behaviour at conditions close to LBO. Evaporation is known to be the limiting factor for combustion in spray …
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Effects of Fuel Molecular Structure and Composition on Soot Formation in Direct-Injection Spray Flames
… and KL maps show uneven distributions for flames of various fuels. Analysis shows that the temperature and KL values of heavily sooting fuels are primarily a result of conditions (temperature and soot concentration) within a 1—2 mm region on the surface of the jet, where a turbulent …
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Blow-off in gas turbine combustors
… and the blow-off events of non-premixed and spray flames stabilized on an axisymmetric bluff body in a confined swirl configuration. The comparison of flames of different canonical types in the same basic aerodynamic field allows insights on the relative blow-off behaviour. The first part of …
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Pyrolysis oil combustion characteristics and exhaust emissions in a swirl-stabilized flame
… oils in pressure-atomized and air-atomized spray flames. Pine and corn fiber derived pyrolysis oil have been studied, with light fuel oil (LFO) used as a baseline fuel for comparison. Gaseous and particulate exhaust emissions have been measured, and the particulate samples studied with …
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The use of chemiluminescence for detection of ignition, temperature, and fuel-to-air ratio of flames
… detection of ignition and extinction of liquid spray flames has been improved. Also, a method of determining fuel-to-air ratios and temperatures of pre-mixed, gaseous flames has been developed. Both methods utilize chemiluminescent signals from an OH system centered at 309 nm and a CH system …
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The use of chemiluminesence for light-off detection of flames
… method for detection of light-off in gaseous flames and liquid spray flames has been developed. The method used chemiluminescent signals from the 2Σ - ²π OH system centered at 309 nm and the ²Δ - ²π CH system centered at 430 nm to indicate the presence of a flame. Spectral scans (performed on …
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Characterization of 1-butanol electrospray combustion
This study examined the characteristics of electrosprays of 1-butanol that burn in air. Still images and high-speed movies captured with a laser sheet present helped to establish general flame phenomenology and features such as shape, size, and stability of the spray flame. The dependence of the …
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EXPERIMENTAL INVESTIGATION OF THE RESPONSE OF FLAMES WITH DIFFERENT DEGREES OF PREMIXEDNESS TO ACOUSTIC OSCILLATIONS
… of the response of lean turbulent swirling flames with different degrees of premixedness (i.e. different mixture patterns) to acoustic forcing using the same burner configuration and varying only the fuel injection strategy. Special emphasis was placed on the amplitude dependence of their …
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Flow Field and Soot Formation Characteristics in Swirl-stabilized Non-premixed Turbulent Flames
… in turbulent swirl-stabilized non-premixed flames using three different fuels: methane, ethanol and aviation Jet A-1. The studied flames were confined and stabilized in a model gas turbine combustor with a swirl number of ~0.55. Soot volume fraction, fv, and primary soot particle size, dp, …
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Experimental Investigation of Large Scale Aerodynamics on Soot Emissions in Swirling Flows
… (RQL) technology that employs turbulent swirling flames with downstream dilution air. These turbulent flames exhibit spatial and temporal fluctuations not present in laminar flames. This adds a level of complexity to turbulent soot studies that is yet to be fully understood. In this study, a …