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Keywords: convection
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Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2019, 141(1): 011013.
Paper No: GTP-18-1333
Published Online: September 14, 2018
...-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...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2018, 140(4): 041510.
Paper No: GTP-17-1407
Published Online: November 7, 2017
... 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...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2018, 140(3): 031506.
Paper No: GTP-17-1354
Published Online: October 25, 2017
... 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...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2017, 139(6): 062506.
Paper No: GTP-16-1422
Published Online: February 7, 2017
... agreement with published analytical solutions. Convection Note: the terms cob, shroud, and diaphragm are, respectively, used below to denote the bulbous hub at the center of the disk, the rotating outer casing, and the thin section of the disk. The figures in this paper are in grayscale...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2017, 139(4): 042504.
Paper No: GTP-16-1367
Published Online: November 2, 2016
... 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...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2017, 139(3): 031903.
Paper No: GTP-16-1241
Published Online: October 4, 2016
... Aerodynamics Computational fluid dynamics Convection Convective heat transfer Experimental Forced convection Heat transfer Natural convection Radiation Thermal Thermocouples Modern steam turbine power plants show increasing firing and turbine inlet temperatures to improve the cycle...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2017, 139(1): 011502.
Paper No: GTP-16-1230
Published Online: August 16, 2016
... 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...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. February 2012, 134(2): 022504.
Published Online: December 20, 2011
... convection lubrication machine bearings rotors Tilting pad journal bearings are commonly used in rotating machinery due to their inherent stability properties [( 1 2 )] Hence, an important amount of effort has been put during the last four decades in order to improve the quality and accuracy...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 2010, 132(10): 102914.
Published Online: July 7, 2010
...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...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 2010, 132(10): 102907.
Published Online: July 2, 2010
.... 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...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. September 2010, 132(9): 092901.
Published Online: June 17, 2010
... 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...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2008, 130(3): 032502.
Published Online: April 2, 2008
... simulates the case when heat loss is only due to heat convection on the rotor surface and the rotor end is adiabatic ( Q E = 0 ) . Case 3 is a limiting case of Case 1; the rotor end temperature is specified as the ambient temperature, T E = 15 ° C . Parametric studies...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2007, 129(3): 680–687.
Published Online: September 19, 2006
... 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. Evidence of a strong outer recirculation zone transporting hot...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2007, 129(3): 769–777.
Published Online: July 20, 2006
... models ( 18 ). The convective heat transfer model applied to the rotor wall is based on the method of Kader ( 19 ); and other surfaces were assumed adiabatic. Additional computations were performed to confirm that the results were not sensitive to inlet turbulence level or to the uniform rotor...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. April 2007, 129(2): 326–330.
Published Online: June 28, 2006
...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...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. April 2007, 129(2): 318–325.
Published Online: February 1, 2006
.... convection flow simulation flow instability Navier-Stokes equations compressors discs (structures) gas turbines In order to achieve further improvements in turbomachinery internal air system design and component temperature prediction, an accurate knowledge of the flow and heat transfer...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. April 2007, 129(2): 305–311.
Published Online: November 15, 2005
... 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...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2007, 129(1): 61–68.
Published Online: September 28, 2005
... 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...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2006, 128(3): 599–609.
Published Online: September 6, 2005
... tips that diminishes further away. Heat flux conducted through the bristles dissipates into the flow by a strong convection at the fence-height region. 30 08 2005 06 09 2005 rotors seals (stoppers) temperature distribution oxidation fibres thermal conductivity convection...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2005, 127(3): 457–463.
Published Online: June 24, 2005
... 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...