In this work a robust discontinuous Galerkin (DG) solver for turbulent high-lift aerodynamic flows using the turbulence model of Spalart and Allmaras (SA) is developed. The application of DG discretizations to turbulent RANS flows is one of the most pressing issues facing high-order methods on unstructured grids. The issue is the result of non-smooth behavior of the turbulence model equation, w...

Power generation today is an increasingly demanding task, worldwide, because of emphasis on efficient ways of generation. A power station is a complicated multivariable controlled plant, which consists of boiler, turbine, generator, power network and loads. The power sector sustainability depends on innovative technology and practices in maintaining unit performance, operation, flexibility and ...

0010-2180/$ see front matter 2009 The Combust doi:10.1016/j.combustflame.2009.11.009 * Corresponding author. Present address: CFD Rese AL 35805, United States. Fax: +1 256 726 4806. E-mail addresses: [email protected] (R.S. Mehta), dch [email protected] (M.F. Modest). 1 Present address: Department of Mechanical Engine Merced, CA 95348, United States. A comprehensive model for luminous turbulent ...

A Computational Fluid Dynamics (CFD) modeling study has been conducted to evaluate the application of overfire air (OFA), Fuel Lean Gas Reburn (FLGR), and Selective Non-Catalytic Reduction (SNCR) to reduce NOx emissions from Owensboro Municipal Utilities’ Elmer Smith Station. Smith Station Unit 1 is a nominally rated 150 MWe single-wall cyclone fired boiler with three barrels. FLGR is a NOx con...

This work presents a numerical analysis of the ability of the high lift airfoil profile Selig S1223 for working as hydrofoil under water conditions. The geometry of the hydrofoil blade is designed through a suitable airfoil profile and then studied carefully by means of Computational Fluid Dynamics (CFD) in order to check its hydrodynamic behavior, i.e., including lift and drag analysis, and de...

Reactivity Controlled Compression Ignition (RCCI), which is a low temperature combustion mode based on the principle of working with dual fuel, has attracted attention researchers in recent years due to its advantages such as high thermal efficiency, NOx and soot emissions, controllability combustion. In this study, effects injection timing lambda RCCI were investigated numerically by validatin...

The authors applied one-dimensional (1-D) simulation and 3-D Computational Fluid Dynamics (CFD) simulation to evaluate the potential of in-cylinder control methods on a low-speed 2-stroke marine engine to reach the International Maritime Organization (IMO) Tier 3 NOx emissions standards. Reducing the combustion temperature is an important in-cylinder measure to decrease NOx emissions of marine ...

Fire whirls are powerful, spinning disasters for people and surroundings when they occur in large urban and wildland fires. Whereas fire whirls have been studied for fire-safety applications, previous research has yet to harness their potential burning efficiency for enhanced combustion. This article presents laboratory studies of fire whirls initiated as pool fires, but where the fuel sits on ...