Results 41 to 50 of about 77,164 (345)

The Interaction of High-Speed Turbulence with Flames: Global Properties and Internal Flame Structure

, 2011
We study the dynamics and properties of a turbulent flame, formed in the presence of subsonic, high-speed, homogeneous, isotropic Kolmogorov-type turbulence in an unconfined system.
A.Y. Poludnenko, Aspden, Bell, Bilger, Boger, Boris, Buschmann, Colella, Colella, Damköhler, Davidson, Dinkelacker, Driscoll, Dunn, E.S. Oran, Gamezo, Gamezo, Gardiner, Grinstein, Khokhlov, Kolmogorov, Lemaster, Libby, Liu, Mansour, Meneveau, Peters, Porter, Saltzman, Sankaran, Stone, Stone, Stone, Tanahashi, Williams, Zel’dovich, Zel’dovich   +36 more
core   +1 more source

Transient combustion responses of homogeneous propellants to acoustic oscillations in axisymmetric rocket motors [PDF]

, 1997
A numerical analysis of unsteady motions in solid rocket motors has been conducted. The formulation considers a 2-D axisymmetric combustion chamber and a choke nozzle, and treats the complete conservation equations accounting for turbulence closure ...
Culick, F. E. C., Roh, T. S.
core   +1 more source

Large-Eddy Simulation of combustion instabilities in a variable-length combustor. [PDF]

, 2013
This article presents a simulation of a model rocket combustor with continuously variable acoustic properties thanks to a variable-length injector tube. Fully compressible Large-Eddy Simulations are conducted using the AVBP code.
Garby, Romain, Poinsot, Thierry, Selle, Laurent   +2 more
core   +3 more sources

Acoustic power measurements of oscillating flames [PDF]

, 1981
The acoustic power of an oscillating flame is measured. A turbulent premixed propane/air flame is situated near a pressure antinode of a standing wave in a laboratory combustion chamber. This standing wave is generated by a piston.
Valk, M.
core   +11 more sources

The influence of turbulence on the structure and propagation of enclosed flames [PDF]

, 1966
Although it has long been established that burning rates can be appreciably increased by turbulence, the actual extent of this increase and the precise mechanism involved are still far from clear.
Lefebvre, A. H., Reid, R.
core   +1 more source

Phenomenological and Physically Based Modeling of Flow Stress and Strengthening Mechanism of Inconel 718

Advanced Engineering Materials, EarlyView.
Nickel‐based alloys are widely used in high‐temperature applications due to their excellent mechanical strength and oxidation resistance. However, properties such as high‐temperature strength and pronounced work‐hardening make them difficult to machine.
Soheil Rooein, Oliver Schenk, Christoph Broeckmann   +2 more
wiley   +1 more source

Comparative chemiluminescence investigation of OH* radicals in laminar and turbulent multi-fuel air- and oxy-fuel flames on semi-industrial and laboratory scale including NOX-formation

Fuel Processing Technology
Chemiluminescence emitted by the de-excitation of excited hydroxyl radicals (OH*), allows for several insights into combustion processes. The presented study investigates air- and oxy-fuel combustion of natural gas with hydrogen enrichment up to 100 ...
Stefan Schwarz, Georg Daurer, Joshua Slawatycki, Matthias Urban, René Prieler, Christian Gaber, Martin Demuth, Christoph Hochenauer   +7 more
doaj   +1 more source

Natural Bone‐Derived Ceramic Scaffolds Functionalized with Chitosan‐Gold, Chitosan‐Magnesium, and Chitosan‐Zinc for Enhanced Antibacterial Activity

Advanced Engineering Materials, EarlyView.
This study reports the development of antibacterial ceramic scaffolds derived from natural bovine bone. The bones were processed through sequential boiling and hydrogen peroxide treatment to remove organic matter, producing porous, mineral‐rich scaffolds.
Mohamad Hassan Taherian, Anh Thi Le, Anh Thi Van Le, Dung My Thi Dang, Tin Chanh Duc Doan, Chien Mau Dang, Martin Bolduc   +6 more
wiley   +1 more source

Turbulent partially cracked ammonia/air premixed spherical flames

Fuel Communications
The combustion of ammonia requires, for most energy conversion systems, a combustion promoter such as hydrogen to guarantee the start-up, stability and combustion efficiency.
S. Zitouni, P. Bréquigny, C. Mounaïm-Rousselle   +2 more
doaj   +1 more source

Investigation of Dilution Effect on CH₄/Air Premixed Turbulent Flame Using OH and CH₂O Planar Laser-Induced Fluorescence

Energies, 2020
Diluting the combustion mixtures is one of the advanced approaches to reduce the NOx emission of methane/air premixed turbulent flame, especially with high diluents to create a distributed reaction zone and mild combustion, which can lower the ...
Li Yang, Wubin Weng, Yanqun Zhu, Yong He, Zhihua Wang, Zhongshan Li   +5 more
doaj   +1 more source