... autoignition. This study also identifies a role of turbulent flow property adjacent to premixed flame front in characterizing the mixed-mode combustion. The employed hybrid combustion model was verified to perform simulations aiming at suitable range of multi-mode engine operations. It should be noted...

... (1# and 2#) with different concentrations from 3 ppm to 50 ppm were added into diesel, respectively, and speed of impeller speed was set 400 rpm. Flow field characteristics including turbulence intensity, turbulent kinetic energy (TKE), and energy dissipation rate (EDR) influenced by those additives...

...-dimensional Favre-averaged equations for weakly compressible flows. FLUENT uses a finite volume “particle source in cell” approach to model the fundamental transport equations. Closure is achieved via the k − ε turbulence model. Bagasse particles are tracked using Lagrangian particle tracking...

... erosion if they impinge on the tubes of the following (upstream, in the direction of the gas path) rows. Three sootblower configurations were considered to analyze this presumed phenomenology of tube erosion. The (significant) effects of turbulence on the motion of the solid particles are taken...

... investigated by numerical methods. To this, a two-dimensional axis-symmetric physical model of porous burner is considered. As the most typical porous burners, a two stage one which has preheating porous zone (PPZ) and combustion porous zone (CPZ) is studied. The continuity, momentum, energy, turbulence...

... model, which is capable of accurately representing the rheogram of virtually any time-independent fluid. Predictions of the new method are compared with published experimental data gathered from large-scale flow loops. The tested cases include laminar and turbulent flow for a variety of drilling fluids...

... inclined tangential inlet. Axial and tangential velocities and turbulent kinetic energy across the cylinder diameter ID = 0.089 m were measured at 24 different axial locations (0.32–0.90 m below the inlet) by using a laser Doppler velocimeter (LDV). The liquid flow rate was 16.4 m 3 / h , which corresponds...

.... The numerical procedure was based on the finite volume formulation. The κ-ε model of turbulence was selected for simulating the turbulent flow field. The combustion process was calculated based on the finite rate models of Arrhenius and Magnussen, and the Discrete Transfer Radiation model was employed...

... the results of a parametric study which was carried out to establish the nature of combustion within such vessels and tubing. The test vessel had an internal volume of 7 in 3 (115 ml) and the tubing had a nominal diameter of 0.5 in (1.27 mm). Flowing, turbulent, pre-mixed natural gas/air mixtures were used...

.... 01 April 2001 01 December 2002 04 06 2003 surface topography measurement friction mechanical variables measurement flow measurement pressure measurement turbulence pipe flow natural gas technology fractals Friction Factor Turbulent Flow Wall Roughness Pressure Drop...

.... Geometry changes result when corners, found in couplings and chokes, are eroded with time. This change in geometry due to erosion can drastically change the flow field, especially the turbulent kinetic energy and dissipation rate. Recognizing this change is imperative, since the prediction of particle...

... patterns, corresponding flame appearances, and axial length of recirculation bubble in different flow regimes are illustrated and compared. Mean velocity and turbulent stresses along the central axis are presented and discussed. The combustion characteristics in different characteristic flow regimes...