Fuel Lewis Number Effect on Nitric Oxide Emission of Acoustically Pulsed Laminar Jet Diffusion Flames PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Fuel Lewis Number Effect on Nitric Oxide Emission of Acoustically Pulsed Laminar Jet Diffusion Flames PDF full book. Access full book title Fuel Lewis Number Effect on Nitric Oxide Emission of Acoustically Pulsed Laminar Jet Diffusion Flames by Marcos Chaos. Download full books in PDF and EPUB format.
Author: Marcos Chaos
Publisher:
ISBN:
Category : Chemiluminescence
Languages : en
Pages : 56
Get Book Here
Book Description
The goal of the proposed research work is to gain insight into the dependence of formation of NOx (i.e. NO and NO2) on unsteady flame dynamics and thermal diffusive (i.e. Lewis number) effects in diffusion flames. The coupled effect of fuel Lewis number and flow unsteadiness will be systematically investigated and implications for fully turbulent flow will be revealed. Acoustically pulsed laminar jet diffusion flames will be studied. The effect of a wide range of fuel Lewis numbers will be investigated; flame temperature and NOx emission will be measured using Thin Filament Pyrometry (TFP) and NOx chemiluminescence analysis.
Author: Marcos Chaos
Publisher:
ISBN:
Category : Chemiluminescence
Languages : en
Pages : 56
Get Book Here
Book Description
The goal of the proposed research work is to gain insight into the dependence of formation of NOx (i.e. NO and NO2) on unsteady flame dynamics and thermal diffusive (i.e. Lewis number) effects in diffusion flames. The coupled effect of fuel Lewis number and flow unsteadiness will be systematically investigated and implications for fully turbulent flow will be revealed. Acoustically pulsed laminar jet diffusion flames will be studied. The effect of a wide range of fuel Lewis numbers will be investigated; flame temperature and NOx emission will be measured using Thin Filament Pyrometry (TFP) and NOx chemiluminescence analysis.
Author: Rose L. Schalla
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 32
Get Book Here
Book Description
Author: Doyoub Park
Publisher:
ISBN:
Category :
Languages : en
Pages : 106
Get Book Here
Book Description
In an investigation of unsteady flames, two different frequencies (10 and 100 Hz) were applied to observe a behavior of NO[subscript x] emission levels and flame lengths by changes of unsteady fluid dynamics and transport properties.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Using a Burke-Schumman modeled co-flow burner, a quartz chimney, and a pressure vessel with good optical access, the smoke points in pure and diluted fuels were measured in a laminar jet diffusion flame. Ethylene and methane, burning in a velocity matched, over-ventilated co-flow of air, were tested over the ranges of 1 to 8 atmospheres and 2 to 16 atmospheres, respectively. Various diluents (nitrogen, argon, helium, and carbon dioxide) were added individually to the pure fuels to observe the effects they have on the smoke points and the adiabatic flame temperatures at atmospheric and elevated pressures. These diluents were chosen to allow a wide range of flame temperatures and fuel Lewis numbers to be investigated. For a given fuel flow rate, the dilution level was increased until the flame ceased emitting visible soot (defined as the smoke point). The height of the flame was then measured and the adiabatic flame temperature was calculated based on equilibrium chemistry. While some previous research has focused on the effects of flame temperature (through dilution) on smoke points, the measurements reported here were made to investigate the effects of pressure, different diluents, and varying dilution rates on sooting tendency. The main findings of these experiments were: increasing the amount of diluent to a pure fuel increases the smoke point, the smoke point is a function of the air to fuel velocity ratio, smoke point is strongly dependent on the inverse of pressure, and residence time decreases with increases in pressure.
Author: Joseph P. Koshollek
Publisher:
ISBN:
Category : Nitrous oxide
Languages : en
Pages : 178
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
Get Book Here
Book Description
Author: A. D. Tuteja
Publisher:
ISBN:
Category :
Languages : en
Pages : 500
Get Book Here
Book Description
Author: Timothy Lynn Corley
Publisher:
ISBN:
Category : Gas as fuel
Languages : en
Pages : 396
Get Book Here
Book Description
Interactions between certain fuel sulfur compounds and nitric oxide (NO) in turbulent gaseous and distillate oill diffusion flames were experimentally investigated utilizing a 75,000 Btu/hr laboratory combustor. Aerodynamics, air preheat conditions, and overall excess air conditions were varied to determine their role on any such interaction. Results indicated that addition of sulfur dioxide (SO2) to natural gas flames could enhance or inhibit NO emissions. Local flame stoichiometry and temperature, which were influenced by fuel injector type, determined which effect was observed and the extent to which it occurred.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Turbulent hydrogen diffusion flames diluted with nitrogen are currently being studied to assess their ability to achieve the DOE Turbine Program's aggressive emissions goal of 2 ppm NOx in a hydrogen-fueled IGCC gas turbine combustor. Since the unstrained adiabatic flame temperatures of these diluted flames are not low enough to eliminate thermal NOx formation the focus of the current work is to study how the effects of flame residence time and global flame strain can be used to help achieve the stated NOx emissions goal. Dry NOx measurements are presented as a function of jet diameter nitrogen dilution and jet velocity for a turbulent hydrogen/nitrogen jet issuing from a thin-lipped tube in an atmospheric pressure combustor. The NOx emission indices from these experiments are normalized by the flame residence time to ascertain the effects of global flame strain and fuel Lewis Number on the NOx emissions. In addition dilute hydrogen diffusion flame experiments were performed in a high-pressure combustor at 2 4 and 8 atm. The NOx emission data from these experiments are discussed as well as the results from a Computational Fluid Dynamics modeling effort currently underway to help explain the experimental data.
Author: Howard G. Maahs
Publisher:
ISBN:
Category :
Languages : en
Pages : 58
Get Book Here
Book Description
A study has been made of flame structure and nitric oxide formation in confined laminar CO-air diffusion flames over a pressure range from 1 to 50 atm. The shape of the flames changed from wide and convex at 1 atm to slender and concave at 50 atm, with the greatest change occurring below about 10 atm. Flame height decreased with increasing pressure from 1 atm to about 10 atm, but was independent of pressure at higher pressures. The regimes of stable burning decreased with increasing pressure up to 50 atm, with the greatest reduction occurring between 1 atm and 20 atm. The molar emission index (the moles of nitrogen oxides formed per mole of carbon monoxide consumed) increased as the pressure was increased above 1 atm, reached a maximum at approximately 28 to 30 atm, and thereafter decreased slowly up to 50 atm. Circumstantial evidence is offered to support the proposition that the concentrations of nitrogen oxides in the flames approach their equilibrium values for pressures above about 20 atm. (Author).
