Non-linear simulations of combustion instabilities with a quasi-1D Navier-Stokes code
, 2010 As lean premixed combustion systems are more susceptible to combustion instabilities than non-premixed systems, there is an increasing demand for improved numerical design tools that can predict the occurrence of combustion instabilities with high ...
Allam +29 more
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Statistical analysis of the velocity and scalar fields in reacting turbulent wall-jets
, 2015 The concept of local isotropy in a chemically reacting turbulent wall-jet flow is addressed using direct numerical simulation (DNS) data. Different DNS databases with isothermal and exothermic reactions are examined.
A. V. Johansson +7 more
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Advanced low-NO(x) combustors for supersonic high-altitude gas turbines [PDF]
, 1977 The impact of gas-turbine-engine-powered aircraft on worldwide pollution was defined within two major areas of contribution. First, the contribution of aircraft to the local air pollution of metropolitan areas and, second, the long-term effects on the ...
Roberts, P. B.
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Filtered density functions from direct numerical simulation of a reactive jet in cross-flow
, 2010 Direct numerical simulation (DNS) with multi-step hydrogen-air chemical kinetics is used to investigate the nearfield of a flame stabilized above a reactive jet in cross-flow (JICF). JICF configurations are typically used where rapid mixing is desirable;
Chen, J.H. +4 more
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Effect of degree of fuel vaporization upon emissions for a premixed prevaporized combustion system [PDF]
An experimental and analytical study of the combustion of partially vaporized fuelair mixtures was performed to assess the impact of the degree of fuel vaporization upon emissions for a premixing-prevaporizing flametube combustor.
Cooper, L. P.
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Investigation into Lean-Burn Combustor Thermo-acoustic Instabilities: Modelling of Entropy Convection for Low Frequency Rumble Prediction [PDF]
New combustion methods, aimed to reduce emissions, are shown to be susceptible to instability. To reduce nitrogen oxides, the traditional diffusion flame is replaced by lean combustion, where fuel-air are partially premixed, and combustion conditions are
BARALE, MARCO
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Kolmogorov methodology as a practical way to answer to the challenge of turbulent combustion [PDF]
, 1999 This paper analyses possible practical answer to so-called challenge of turbulent combustion (i. e. inability of combustion models predict accurately at real Reynolds and Damkohler numbers combustion rates) using Kolmogorov idea of equilibrium small ...
Zimont, Vladimir L.
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Effects of percentage of blockage and flameholder downstream counterbores on lean combustion limits of premixed, prevaporized propane-air mixture [PDF]
Lean combustion limits were determined for a premixed prevaporized propane air mixture with flat plate flame stabilizers. Experiments were conducted in a constant area flame tube combustor utilizing flameholders of varying percentages of blockage and ...
Fernandez, M. A. B.
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Rayleigh scattering temperature measurements in a swirl stabilized burner [PDF]
, 2013 Rayleigh scattering temperature measurements were obtained in a turbulent reactive swirling coaxial jet discharged from a swirl-stabilized burner along the jet-flame centerline.
Hardalupas, Y. +3 more
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Turbulence, combustion, pollutant, and stability characterization of a premixed, step combustor [PDF]
A two dimensional combustion tunnel was constructed to study a lean premixed turbulent propane/air flame stablized behind a rearward facing step. Studied were: (1) the existence and importance of large coherent structures in turbulent reacting and ...
Ganji, A. T., Sawyer, R. F.
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