Lean Premixed Flames for Low NO(subscript X) Combustors PDF Download
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Author:
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Languages : en
Pages : 29
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Book Description
The overall objectives of the research at Purdue are to: obtain a reduced mechanism description of high pressure NO formation chemistry using experiments and calculations for laminar lean premixed methane air flames, develop a statistical model of turbulence NO chemistry interactions using a Bunsen type jet flame, and utilize the high pressure chemistry and turbulence models in a commercial design code, then evaluate its predictions using data from an analog gas turbine combustor. Work to date has resulted in the following achievements: spatially resolved measurements of NO in high-pressure high-temperature flat flames, plus evaluation of the influence of flame radiation on the measured temperature profile; measurements of temperature and velocity PDFs for a turbulent methane/air flame were obtained for the first time, under operating conditions which allow their study in the distributed regimes, and the increase in EINO(subscript x) with equivalence ratio predicted using a chemical kinetics model; and simulation of non-reacting combustor flow fields from ambient to elevated pressure and temperature conditions and comparison of those results with experimental velocity profiles.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 29
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Book Description
The overall objectives of the research at Purdue are to: obtain a reduced mechanism description of high pressure NO formation chemistry using experiments and calculations for laminar lean premixed methane air flames, develop a statistical model of turbulence NO chemistry interactions using a Bunsen type jet flame, and utilize the high pressure chemistry and turbulence models in a commercial design code, then evaluate its predictions using data from an analog gas turbine combustor. Work to date has resulted in the following achievements: spatially resolved measurements of NO in high-pressure high-temperature flat flames, plus evaluation of the influence of flame radiation on the measured temperature profile; measurements of temperature and velocity PDFs for a turbulent methane/air flame were obtained for the first time, under operating conditions which allow their study in the distributed regimes, and the increase in EINO(subscript x) with equivalence ratio predicted using a chemical kinetics model; and simulation of non-reacting combustor flow fields from ambient to elevated pressure and temperature conditions and comparison of those results with experimental velocity profiles.
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Category :
Languages : en
Pages :
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Author:
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Category :
Languages : en
Pages : 8
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In order to validate the models for NO(subscript x), CO, and lean blowoff discussed in part 2 of this paper, the development of an experimental datum base was initiated. Experimental data were collected from an industrial, piloted-lean premixed, natural gas fired, can combustor rig. The experiments were designed in order to minimize testing cost and time. Independent variations of inlet pressure (8 to 14 atm), inlet temperature (550 to 750 K), and residence time (13 and 23 ms) were performed in order to gain insight into the sensitivity of the emissions levels to changes in combustor operating conditions.
Author: Nedunchezhian Swaminathan
Publisher: Cambridge University Press
ISBN: 1139498584
Category : Technology & Engineering
Languages : en
Pages : 447
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Book Description
A work on turbulent premixed combustion is important because of increased concern about the environmental impact of combustion and the search for new combustion concepts and technologies. An improved understanding of lean fuel turbulent premixed flames must play a central role in the fundamental science of these new concepts. Lean premixed flames have the potential to offer ultra-low emission levels, but they are notoriously susceptible to combustion oscillations. Thus, sophisticated control measures are inevitably required. The editors' intent is to set out the modeling aspects in the field of turbulent premixed combustion. Good progress has been made on this topic, and this cohesive volume contains contributions from international experts on various subtopics of the lean premixed flame problem.
Author:
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ISBN:
Category : Combustion engineering
Languages : en
Pages : 421
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Book Description
A work on turbulent premixed combustion is timely because of increased concern about the environmental impact of combustion and the search for new combustion concepts and technologies. An improved understanding of lean fuel turbulent premixed flames must play a central role in the fundamental science of these new concepts. Lean premixed flames have the potential to offer ultra-low emission levels, but they are notoriously susceptible to combustion oscillations. Thus, sophisticated control measures are inevitably required. The editors' intent is to set out the modeling aspects in the field of turbulent premixed combustion. Good progress has been made recently on this topic. Thus, it is timely to edit a cohesive volume containing contributions from international experts on various subtopics of the lean premixed flame problem"
Author: Tsan-Hai Chue
Publisher:
ISBN:
Category :
Languages : en
Pages : 280
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Book Description
Author: Paul Palies
Publisher: Academic Press
ISBN: 0128199962
Category : Technology & Engineering
Languages : en
Pages : 400
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Book Description
Stabilization and Dynamic of Premixed Swirling Flames: Prevaporized, Stratified, Partially, and Fully Premixed Regimes focuses on swirling flames in various premixed modes (stratified, partially, fully, prevaporized) for the combustor, and development and design of current and future swirl-stabilized combustion systems. This includes predicting capabilities, modeling of turbulent combustion, liquid fuel modeling, and a complete overview of stabilization of these flames in aeroengines. The book also discusses the effects of the operating envelope on upstream fresh gases and the subsequent impact of flame speed, combustion, and mixing, the theoretical framework for flame stabilization, and fully lean premixed injector design. Specific attention is paid to ground gas turbine applications, and a comprehensive review of stabilization mechanisms for premixed, partially-premixed, and stratified premixed flames. The last chapter covers the design of a fully premixed injector for future jet engine applications. Features a complete view of the challenges at the intersection of swirling flame combustors, their requirements, and the physics of fluids at work Addresses the challenges of turbulent combustion modeling with numerical simulations Includes the presentation of the very latest numerical results and analyses of flashback, lean blowout, and combustion instabilities Covers the design of a fully premixed injector for future jet engine applications
Author: Xujiang Wang
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
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Category :
Languages : en
Pages : 6
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Book Description
With the enactment of the Clean Air Act Amendments of 1990, there is now additional incentive for the development of gas turbine systems with very low NO(subscript x) emissions characteristics. Further, the development of low NO(subscript x) burners that are capable of utilizing low-heating-value gases derived from coal based systems is an essential component for a number of fossil energy technologies including IGCC and second-generation PFBC. However, the chemistry associated with NO(subscript x) formation is complicated, and attempts to reduce these emissions often result in increases in other undesirable species such as CO or N2O. In view of these complexities, it is useful to study NO(subscript x) formation and NO(subscript x) control strategies in a well-controlled, lab-scale burner system. In this way, detailed knowledge about the intricate interrelationships between the various chemical pathways can be obtained and subsequently applied to bench-scale and larger systems. The current project involves both chemical kinetic modeling as well as experimental studies performed in a premixed burner system to generate these data.
Author: Nedunchezhian Swaminathan
Publisher:
ISBN: 9781107218000
Category : Combustion engineering
Languages : en
Pages : 448
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Book Description
A work on turbulent premixed combustion is timely because of increased concern about the environmental impact of combustion and the search for new combustion concepts and technologies.
