...Zixiang Sun; Feng Gao; John W. Chew; Dario Amirante Flow and heat transfer in axial compressor disk cavities involve strong interaction of axial throughflow at the disk bores with centrifugal buoyant flow in the cavities. This paper presents large eddy simulation (LES) of flow and heat transfer...

... Fig. 16 Frequency–diameter diagrams, t ∈  193–194 s Frequency–diameter diagrams, t∈ 193–194 s rotor–stator contact interaction vibration analysis heat transfer frictional heating In turbomachinery, compressor and turbine modules performances are closely related...

..., and investigated the flow and heat transfer characteristics in this alternating elliptical U-bend cooling channel thoroughly. Numerical simulations were performed by using three-dimensional steady solver of Reynolds-averaged Navier–Stokes equations with the standard k– ε turbulence model. The influence...

... its temperature characteristic and level. On the one hand, a numerical conjugate heat transfer (CHT) model of the automotive turbocharger investigated is developed using a commercial CFD-tool and a bidirectional, thermal coupling of the CFD-model with thermohydrodynamic lubrication simulation codes...

...-axis and the horizontal semi-axis are applied. Numerical studies are carried out under three Reynolds numbers. The flow characteristics and heat transfer performance of five DSC cases are compared with the benchmark impingement cooling case. The flow losses, cross-flow development, generated vortices...

.... Considerable improvements of the computing power and numerical simulation tools today allow detailed investigations of the heat transfer and the flow phenomena by conjugate-heat-transfer (CHT) simulations. However, these simulations are still restricted to smaller geometries mostly by the number of elements...

... knowledge about the dominant heat transfer phenomena and flow structures, detailed numerical investigations are required. For the sake of the investigation of the warm-keeping process as found in the presented research, single and multistage numerical turbine models were developed. Furthermore...

.... 25 02 2018 10 05 2018 Burners Combustion Combustors Computational fluid dynamics Flame Fuel combustion Gas turbine technology Heat transfer Modeling Turbulence Turbulent Unsteady flows Flame–wall interaction is a physicochemical process in which flames and wall...

... April 13, 2018; published online August 9, 2018. Editor: David Wisler. 09 04 2018 13 04 2018 Energy Energy conversion Engines Experimental Fuel combustion Fuels Heat transfer Internal combustion engines Natural gas technology Petroleum engineering Thermodynamics...

... recovery and heat transfer effects cause a shortfall between the measured temperature and the flow stagnation temperature. To improve accuracy, the measurement shortfall is corrected post-test using data acquired at representative Mach numbers in a steady aerodynamic calibration facility. However, probes...

... , A. , Clark , K. , Thole , K. , Schmitz , J. , Wagner , J. , Alvin , M. A. , Burke , P. , and Dennis , R. , 2014 , “ The Design of a Steady Aero Thermal Research Turbine (START) for Studying Secondary Flow Leakages and Airfoil Heat Transfer ,” ASME Paper No. GT2014-25570. 10.1115...

..., heat transfer from the cylinder, short circuiting, sensible exhaust enthalpy, and incomplete combustion. The engine controls considered in the present study are speed, equivalence ratio, combustion phasing (ignition timing), cooling-air flow rate, and throttle. Several options are identified...

... OF E NGINEERING FOR G AS T URBINES AND P OWER . Manuscript received August 23, 2017; final manuscript received September 23, 2017; published online July 5, 2018. Editor: David Wisler. 23 08 2017 23 09 2017 Engines Experimental Fouling Heat transfer Particle deposition...

... is done with experimental results, a one-dimensional model is also used to calculate turbulence intensities with respect to geometric factors; these results help to explain observed differences in heat transfer characteristics of the two engines. The results are compared at the same brake mean effective...

...; published online June 15, 2018. Assoc. Editor: Klaus Dobbeling. 21 07 2017 05 11 2017 Energy systems Combustors Cooling Design optimization Energy Energy conversion Engines Exergy Fuel combustion Gas turbine technology Heat transfer Internal combustion engines Mass Transfer...

... on semi-empirical correlations for heat transfer and pressure drop, is developed and verified with turbine cooling data available in the open literature. Based on the validated model, a parametric analysis is performed to understand the variation of turbine cooling requirement with variation in TIT...

...Suhyeon Park; David Gomez-Ramirez; Siddhartha Gadiraju; Sandeep Kedukodi; Srinath V. Ekkad; Hee-Koo Moon; Yong Kim; Ram Srinivasan In this study, we provide detailed wall heat flux measurements and flow details for reacting flow conditions in a model combustor. Heat transfer measurements inside...

... Wisler. 14 07 2017 31 08 2017 Aeronautical propulsion Exergy Heat exchangers Heat transfer Aerospace Propulsion systems By imposing isobaric conditions between the start and end points of the heat exchange process, the irreversibility associated with the heat transfer...

... Combustion Cooling Environmental Experimental Fluids Fossil power generation Fuel combustion Fuels Gas turbine technology Gaseous Heat transfer Mass Transfer Mixed Process Natural gas technology Packed Beds Participating Media Phase change Power systems Reliability Coupled behavior...

...Hui Tang; Mark R. Puttock-Brown; J. Michael Owen The buoyancy-induced flow and heat transfer inside the compressor rotors of gas-turbine engines affects the stresses and radial growth of the compressor disks, and it also causes a temperature rise in the axial throughflow of cooling air through...