...-steady transient multistage CHT simulations, an analytical heat transfer correlation has been developed, since the commonly known calculation approaches from the literature are not suitable for this case. The presented heat transfer correlations describe the convective heat transfer separately at vane...

... velocity and the position of the swirler but are almost insensitive to changes in the length of the combustion chamber (CC). These observations imply that the resonance frequencies of the ITA feedback loop are governed by convective time scales. A scaling rule for ITA frequencies that relies on a model...

... involving the convection of an entropy spot is obtained. The behavior of the instability is analyzed using phenomenological description and classical signal analysis. One shows that the system can be better described by considering two reacting zones: a rich mainly premixed flame is located downstream...

... numbers, it is probable that the effects of buoyancy are very small, and consequently laminar forced-convection dominates for the rotating disks in the cavity. For these cases, the theoretical and experimental distribution of Nusselt numbers show significant differences, and the theoretical Nusselt...

... AND P OWER . Manuscript received July 26, 2016; final manuscript received August 18, 2016; published online November 2, 2016. Editor: David Wisler. 26 07 2016 18 08 2016 Convection Convective heat transfer Energy Experimental Fluids Forced convection Gas turbine technology...

.... The overall validity of the approach was tested against several machines and presented in Ref. [ 10 ]. The above method was shown to be accurate for transient turbine operation. However, it is based on a function which does not distinguish between thermal radiation, natural convection, or forced...

... to reproduce the effects of mainstream–coolant interactions on convective heat loads. By validating the approach through a benchmark against time-averaged quantities, the transient data acquired were examined in order to better understand the unsteady behavior of the thermal load through a statistical analysis...

... of the available models for such devices. compressors convection lubrication machine bearings rotors 27 04 2011 03 05 2011 20 12 2011 20 12 2011 2012 American Society of Mechanical Engineers ...

...D. Chatzikyriakou; S. P. Walker; B. Belhouachi; C. Narayanan; D. Lakehal; G. F. Hewitt During the reflood phase, following a loss-of-coolant-accident (LOCA), the main mechanism for the precursory cooling of the fuel is by convective heat transfer to the vapor, with the vapor being cooled...

.... If the temperature of liquid exceeds the threshold value, the vaporization fronts develop near to the line of contact of a vapor bubble and heater. Fronts of vaporization extend along a heater with constant speed. It is a direct transition from one phase convection to film boiling. Such scenario of crisis...

... temperature far from the bubble. A convective approach has been used to estimate the bubble temperature. The quasisteady one-dimensional model can be extensively used to conduct parametric studies useful for fast estimation of the overall performance of any geometric design. For complex geometry, three...

... by the mean temperature of the side flow without calculating the rotor temperature directly. Heat transfer to the rotor was not considered, and only the radial heat conduction through the top foil (and convection by cooling air through the space between the top foil and bearing sleeve) was taken into account...

... simulations. LES, including radiation, convective cooling, and air cooling, were combined with a reduced chemical scheme that predicts N O x emissions. Good agreement of the calculated flame position and shape with experimental data was found. Lefebvre , A. H. , 1999 , Gas Turbine Combustion...

... with wall functions (Ref. 17 ), in the near wall region, and a k - ε model away from the wall. This overcomes sensitivities to freestream turbulence levels normally experienced by k - ω models ( 18 ). The convective heat transfer model applied to the rotor wall is based on the method...

...A. G. Straatman; N. C. Gallego; Q. Yu; B. E. Thompson Experiments are presented to quantify the convective heat transfer and hydrodynamic loss that is obtained by forcing water through blocks of porous carbon foam (PCF) heated from one side. The experiments were conducted in a small-scale water...

.... As a precursor to the present work, Sun et al. ( 18 ) studied high Rayleigh number free convection under gravity in a stationary cube and under centripetal force in a rotating cavity. Somewhat surprisingly, laminar, unsteady three-dimensional CFD models were found to give excellent agreement with accepted...

... Rayleigh–Bénard convection similar to that found in stationary enclosures. The computed streamlines in the r - θ plane show pairs of cyclonic and anti-cyclonic vortices; but, at the larger Rayleigh numbers, the computed isotherms suggest that the flow in the annulus is thermally mixed. At the higher...

... the formation of a CVP and horseshoe vortices, which are convected downstream. LES also reveals the intermittent formation of upright wake vortices from the horseshoe vortices on the ground toward the CVP. The dispersion of polydisperse spray droplets is computed using the stochastic parcel method. Atomization...

... tips that diminishes further away. Heat flux conducted through the bristles dissipates into the flow by a strong convection at the fence-height region. Typical brush seal dimensions used in CFD model The Newtonian airflow is assumed to be compressible, complying with the ideal gas law...

... with aerodynamic diameter between 10 nm and 1 μm were examined. A constant solid-fuel thermal input of 8 kW was maintained. The combustion products were cooled from 1200 to 420°C during passage through the 4.2 m long reactor to simulate the temperatures experienced in the convection pass of a boiler. Fine particle...