Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 42 for “"flame temperature"”.
-
The use of chemiluminescence for the detection of temperature and fuel-to-air ratio in turbulent premixed flames
A fast response method for the determination of temperature and equivalence ratio has been developed for turbulent premixed flames. This method utilizes chemiluminescent signals to make correlations with flame temperature and equivalence ratio. Emissions from two radical groups are used for the …
-
Investigation on weakly curved counterflow diffusion flames at infinitely fast chemistry
… the behavior of a counterflow diffusion flame subject to a flow field comprising of a first order potential flow superimposed on a weak second order correction to the potential flow. An Arrhenius one-step irreversible reaction model at infinite Damkohler number and constant density is …
-
An Interactive Chemical Equilibrium Solver for the Personal Computer
… will then calculate equilibrium composition, flame temperature, and other thermodynamic properties for many common cases. Examples in this thesis show VTEC's ability to predict chemical equilibrium compositions and flame temperature for selected reactions, and demonstrate how VTEC can …
-
Transient model of preheating a submerged entry nozzle
… axisymmetric computational model of the flame, combustion reactions, and air entrainment has been combined with a transient model of heat transfer in the refractory walls to simulate the SEN preheating process. The model predictions match with experimental measurements of preheating with …
-
Development of Color Ratio Thin Filament Pyrometry Approach for Applications in High Speed Flames
… pyrometry is a proven technique used to measure flame temperature by capturing the spectral radiance produced by the immersion of silicon carbide filaments in a hot gas environment. In this study a commercially available CMOS color camera was used, and the spectral response of each color channel …
-
Investigations of the Effects of Flame Configuration on the Combustion of Laminar Diffusion Flame
… and objective to study double inverse diffusion flame is introduced, followed by the literature survey on soot formation in inverse diffusion flame (IDF), application of the unique structure of double inverse diffusion flame (DIDF), radiation effects on DIDF, factors that affect the formation of …
-
Effect of high velocity oxy-fuel (HVOF) coatings on fatigue behaviour of carbon steel
… grain size resulting from the high HVOF flame temperature (2750 ˚C). The increment of coating thickness from 0.15 to 0.35 mm decreased the yield strength of the coated by 4.4% as due to the long-time exposure to high HVOF flame temperature. From the grit-blasting treatment, the embedment …
-
Effects of multi-circular jet plates on the spray and flame characteristics of internal mixing air-assisted atomizer
… fuel and air plays a major role in the spray and flame behaviour, hence, affects the combustion performance and emissions of the internal mixing air�assisted atomizers. This research aims to determine the effects of multi-circular jet (MCJ) plates on the spray behavior and flame characteristics of …
-
Soot formation in vitiated-air diffusion flames
… using optical techniques in dual mode diffusion flames. A dual mode flame is defined as a diffusion fuel jet that burns in the wake of a premixed flame. The premixed flame combustion products simulate a vitiated-air environment: the air is preheated, rich in radicals, and depleted in oxygen. A …
-
Dynamic stability, blowoff, and flame characteristics of oxy-fuel combustion
… is recycled from the exhaust to mitigate temperature. This substitution of carbon dioxide with the nitrogen in air alters the thermodynamics, transport properties, and relative importance of chemical pathways of the reacting mixture, impacting the flame temperature and stability of the …
-
Effects Of Transport Properties And Flame Unsteadiness On Nitrogen Oxides Emissions From Laminar Hydrogen Jet Diffusion Flames
… acoustically forced, hydrogen jet diffusion flames diluted by argon and helium. The primary purpose of this research is to determine how the fuel Lewis number and the flow unsteadiness play a combined role in maximum flame temperature and affect NOx emission from jet diffusion flame. The fuel …
-
Electric field effects on chemi-ionization in droplet burning
… field are studied for a single isolated droplet flame under the spherically symmetric 1-D configuration. A reduced 3-step chemical kinetic mechanism is proposed to capture the production and destruction of ions inside the flame, which is then used for conducting analytical and numerical …
-
A study on micro-scale combustion
… and numerical simulation has shown that the temperature difference between the flame and the internal wall is linear in the axial direction. Making use of the analytical results, an equation for predicting flame temperature has been derived and validated by experiment. Both simulation and …
-
A sensor for combustion thermometry based on blue diode lasers.
Spatially-resolved measurements of flame temperature have been demonstrated with diode lasers for the first time. The technique is based on the use of blue diode lasers to perform laser-induced fluorescence on indium atoms seeded to the flame. Temperature measurements have been carried out in …
-
Shoot Flammability Patterns in Urban Plants at the Wildland-Urban Interface of the Greater Sydney Region
… measured throughout the chapters are the time to flame, flame temperature, flame duration and number of flame events. The study species’ plant traits were also measured to determine if plant physiology was related to flammability attribute outcomes. The plant traits of bulk density and leafing …
-
A Study of Greenhouse Gas Emissions and Performance of an Internal Combustion Engine Operating on Landfill Gas Blends as Fuel
… (CO), increases the energy density, improves the flame stability, and decreases emissions such as nitrogen oxides (NO<sub>x</sub>), CO, and unburned hydrocarbons (UHCs).<sup>1</sup> Due to the natural variability of the CO<sub>2</sub>/CH<sub>4</sub> ratio of the LFG from temperature and waste …
-
Translation of dilution tolerance for gasoline SI engine
… known. Primarily, it reduces peak combustion temperatures. This can be used as an effective means to reduce losses and hazardous emissions. Too much dilution, however, and the combustion stability is compromised. To facilitate this project, an engine was fully instrumented. Experiments were …
-
Design and implementation of Carbon Monoxide and Oxygen emissions measurement in swirl-stabilized oxy-fuel combustion
… combustion were done at a constant adiabatic flame temperature. This corresponds to an equivalence ratio of 0.6 for air, and a CO₂ mole fraction of 0.69 for oxy-fuel combustion. Overall the measurement system provided reasonable readings for air-combustion, but measurements in oxy-fuel …
-
Design and operational characteristics of a gasification-combustion process: flammability model
… moisture content (w.b.), and a maximum adiabatic flame temperature of 2025°C for dry oak. Chemical equilibrium theory was used to predict gasification-combustion product concentration. Based on the analysis of the data, the following conclusions were made: (1) Flammability of gas-air mixture is …
-
Laser-induced incandescence for soot diagnostics at high pressure
… and applied mainly for soot diagnostics in flames. However, only little work has been performed before on LII in sooting flames at elevated pressure. Nonetheless, this is important for applications in technical high-pressure environments, namely Diesel engines. Construction of a sooting …
Page 1 of 3