... with experimental data obtained from coast-down tests of a high-speed spindle supported on gas lubricated bearings, operated in air and in halocarbon R245fa at various pressures. The windage losses are first computed considering state-of-the-art laminar flow loss models in the gas bearings and an experimentally...

...     θ 00 = 0 . 465 · Re - 0 . 0756 Core tube Nusselt number for fully developed laminar flow through cylindrical annulus as a function of the heat rate ratio φ and the radius ratio r  * Table 1 Nu ii and θ ii for a circular annulus, fully...

.... [ 31 ] for a discussion on the transition from turbulent to laminar flow (strictly applicable to a single fluid) and the formulas for friction factors applicable to all flow regimes. Drag power loss versus inlet gas volume fraction (β S ). Mixture N 2 in ISO VG 2 oil (Δ P  = 71 bar, 10 krpm...

... turbines laminar flow length measurement pressure velocity measurement The laminar premixed flame speed is a fundamental physical property of a combustible mixture related to mixture composition, stoichiometry, temperature, and pressure ( 1 ). For gas turbine combustion systems, the laminar...

... combustion flames flow instability fluid oscillations functional analysis laminar flow pipe flow Reduction of pollutant emissions to meet environmental regulations has led to novel solutions in combustor design. Advanced systems use new premixed burners in which the flame is more compact...

... chemiluminescence flames flow visualisation fluorescence ignition jets laminar flow laser beam applications measurement systems velocimeters Auto-ignition of fuel in an oxidizer at elevated temperature is of significant practical interest, for example in internal combustion engines, scramjets...

...Christian Eichler; Thomas Sattelmayer Premixed combustion of hydrogen-rich mixtures involves the risk of flame flashback through wall boundary layers. For laminar flow conditions, the flashback mechanism is well understood and is usually correlated by a critical velocity gradient at the wall...

... NO carbon compounds flames laminar flow nitrogen compounds soot 27 01 2010 09 03 2010 24 08 2010 24 08 2010 2010 American Society of Mechanical Engineers ...

... and the fence subtended angle, the fence may increase or decrease the diffuser effectiveness in comparison with sudden expansion without fence. 27 02 2009 21 04 2009 10 08 2010 10 08 2010 differential equations diffusion laminar flow sudden expansion with fence Reynolds...

... combustion flames gas mixtures gas turbines laminar flow reaction kinetics 16 04 2009 13 08 2009 10 06 2010 10 06 2010 2010 American Society of Mechanical Engineers ...

... above 1 atm and at rich conditions. 04 04 2008 22 05 2008 30 10 2009 combustion fuel gas turbines ignition laminar flow natural gas technology reaction kinetics theory Fuel-flexible gas turbine engines are presently of interest to the power generation and combustion...

... using a probability distribution function modeling approach. The results of the TF model are in better agreement with data when compared with the predictions of the G -equation approach. 15 10 2008 17 10 2008 14 07 2009 combustion flames laminar flow statistical distributions...

... the physics behind lifted flames. Lifted flames have been a canonical problem for testing models for partially premixed turbulent combustion. combustion flames jets laminar flow turbulence 04 04 2008 25 08 2008 10 02 2009 2009 American Society of Mechanical Engineers ...

... vapor. Soot particles play a major role in heat transfer from the flame. Therefore, better understanding and control of soot forming processes in hydrocarbon combustion are required. diffusion finite difference methods flames heat transfer jets laminar flow oxidation 21 09 2007...

... hydrogen laminar flow stagnation flow hydrogen laminar flame speed strain sensitivity N 2 dilution reactant preheat One of the most extensively studied kinetic mechanisms is that of hydrogen combustion because of its relative simplicity and its importance in understanding combustion...

... shaft speeds ( 4000 rpm , 6000 rpm , 8000 rpm , and 10000 rpm ) and bearing unit loads from 0 kPa to 1034 kPa ( 150 psi ) . Laminar flow was produced for all test conditions. A finite-element algorithm was used to generate solutions to the Reynolds-equation model. Excellent agreement was found between...

... mixtures laminar flow With an emerging need to address gas turbine combustor issues such as fuel variability and fuel flexibility, and fundamental information and data regarding the combustion characteristics of commercial and alternative fuels are essential ( 1 2 ). Future generation gas turbine...

... turbulent combustion in stationary gas turbines. 29 08 2005 15 01 2007 30 01 2008 gas turbines laminar flow flames computational fluid dynamics turbulence mechanism reduction heat release syngas flame speed The introduction of syngas combustion technology...

... upstream. 15 06 2006 05 03 2007 13 12 2007 combustion flames ignition laminar flow turbulence kernel growth flame propagation flame velocity autoignition flashback Recently, the inhomogeneous (nonpremixed) autoignition of axisymmetric nitrogen-diluted hydrogen...

...Mihai Arghir 03 01 2007 04 01 2007 seals (stoppers) confined flow laminar to turbulent transitions laminar flow turbulence surface roughness The authors are grateful for this experimental validation of the negative direct static stiffness of choked annular seals...