نتایج جستجو برای: turbulence diffusion flame

تعداد نتایج: 212831  

2008
S. E. Woosley A. R. Kerstein F. Röpke

The nature of carbon burning flames in Type Ia supernovae is explored as they interact with Kolmogorov turbulence. One-dimensional calculations using the Linear Eddy Model of Kerstein (1991) elucidate three regimes of turbulent burning. In the simplest case, large scale turbulence folds and deforms thin laminar flamelets to produce a flame brush with a total burning rate given approximately by ...

2010
S. Som S. K. Aggarwal

0010-2180/$ see front matter 2010 The Combust doi:10.1016/j.combustflame.2010.02.018 * Corresponding author. Address: University of Illin Mechanical & Industrial Engineering, 842 West Tayl 7022, USA. Fax: +1 312 413 0441. E-mail address: [email protected] (S.K. Aggarwal). Injector flow dynamics and primary breakup processes are known to play a pivotal role in determining combustion and emissions in d...

Journal: :Aerosol science and technology : the journal of the American Association for Aerosol Research 2013
Aamir D Abid Masakazu Kanematsu Thomas M Young Ian M Kennedy

We utilized gas-phase diffusion flame synthesis, which has potential for large-scale production of metal oxide nanoparticles, to produce iron oxide nanoparticles (IONPs) with variable oxidation states. The efficacy of these materials in removal of arsenate (As(V) ) from water was assessed. Two different flame configurations, a diffusion flame (DF) and an inverse diffusion flame (IDF), were empl...

2000
R. W. Thatcher J. W. Dold

A counterflow diffusion flame model is studied revealing that, at least as a part of the quenching boundary is approached in parameter space at low enough Lewis numbers, an edge of a diffusion flame, or triple flame, has a propagation speed that still advances the burning solution into regions that are not burning. In crossing the quenching boundary, the advancing flame edge remains a robust pa...

2012
Jose Castillo Peter B. Sunderland Andre W. Marshall Jose Castillo Moreno

Title of Document: Measurements of Soot Temperature in a Diffusion Flame Using a Digital Camera Jose Castillo Moreno, Master of Science, 2012 Directed by: Peter B. Sunderland, Associate Professor, Department of Fire Protection Engineering Temperatures were measured in a laminar axisymmetric diffusion flame with a digital camera. The camera was a Nikon D700, modified to remove the Infra-Red (IR)...

2012
Kevin M. Lyons Kevin Lyons

This research supported by the U.S. Army Research Office examines a myriad of facets of lifted hydrocarbon jet flames in the presence of air co-flow. At a certain jet exit velocity, a flame will lift from the fuel nozzle and stabilize at some downstream position. The partially-premixed flame front of the lifted flame oscillates, with the oscillations becoming greater in flames stabilized furthe...

Journal: :Physical review. E 2017
Vitaly Bychkov Jad Sadek V'yacheslav Akkerman

While flame propagation through obstacles is often associated with turbulence and/or shocks, Bychkov et al. [V. Bychkov et al., Phys. Rev. Lett. 101, 164501 (2008)10.1103/PhysRevLett.101.164501] have revealed a shockless, conceptually laminar mechanism of extremely fast flame acceleration in semiopen obstructed pipes (one end of a pipe is closed; a flame is ignited at the closed end and propaga...

2013
J. Prager H. N. Najm M. Valorani

Results of a detailed numerical analysis of an n-heptane/air edge flame are presented. The equations of a low-Mach number reacting flow are solved in a two-dimensional domain using detailed models for species transport and chemical reactions. The reaction mechanism involves 560 species and 2538 reversible reactions. We consider an edge flame that is established in a mixing layer with a uniform ...

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