CFD Modeling of Film Cooling Flow with Inclined Jets
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Keywords

Film cooling
inclined jet
RANS model
turbulence model
CFD

How to Cite

Majid A. Almas. (2016). CFD Modeling of Film Cooling Flow with Inclined Jets. Journal of Advances in Applied &Amp; Computational Mathematics, 3(1), 29–33. https://doi.org/10.15377/2409-5761.2016.03.01.5

Abstract

Film cooling has been widely used to control temperature of high temperature and high pressure blades. In a film cooled blade the air taken from last compressor stages is ejected through discrete holes drilled on blade surface to provide a cold layer between hot mainstream and turbine components. A comprehensive understanding of phenomena concerning the complex interaction of hot gasses with coolant flows in a vane passage plays a major role in the definition of a well performing film cooling scheme. In this study turbulent film cooling flow has been studied numerically. The computational simulation is conducted by employing the Reynolds Averaged Navier-­Stokes (RANS) approach. The standard k-e  model with enhanced wall treatment has been implemented for modeling the turbulent flow. Effects of different cooling holes temperature have been studied on the surface of the blade and as results show the temperature of the surface reduces significantly as the temperatures of the cooling holes decreases.

https://doi.org/10.15377/2409-5761.2016.03.01.5
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References

Moffat R. Turbine Blade Cooling. Heat Transfer and Fluid Flow in Rotating Machinery 1987; 3-36.

Bunker RS. Film cooling: breaking the limits of diffusion shaped holes, Heat Transfer Res 2010; 41: 627-650. http://dx.doi.org/10.1615/HeatTransRes.v41.i6.40

Bunker RS. A review of shaped hole turbine film-cooling technology, ASME J Heat Transfer 2005; 127: 441-453. http://dx.doi.org/10.1115/1.1860562

Gritsch M, Schulz A, Wittig S. Adiabatic wall effectiveness measurements of film-cooling holes with expanded exits. ASME Paper 1997; 97-GT-164.

Blair MF. An experimental study of heat transfer and film cooling on a largescale turbine endwalls. ASME J Heat Transfer 1974; 96: 524-529. http://dx.doi.org/10.1115/1.3450239

Goldstein R, Eckert E and Burggraf F. Effects of hole geometry and density on three-dimensional film cooling. Int J Heat Mass Transfer 1974; 17: 595-607. http://dx.doi.org/10.1016/0017-9310(74)90007-6

Graziani RA, et al. An experimental study of endwall and airfoil surface heat transfer in a large scale turbine blade cascade. ASME J Gas Turbines Eng Power 1980; 102: 257-267. http://dx.doi.org/10.1115/1.3230246

Pasinato HD, Squires KD and Roy RP. Measurement and modeling of the flow and heat transfer in a contoured vaneendwall passage. Int J Heat Mass Transfer 2004; 47: 5685-5702. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2004.07.032

Friedrichs S, Hodson HP and Dawes WN. Distribution of filmcooling effectiveness on a turbine endwall measured using the ammonia and diazo technique. ASME J Turbomach 1996; 118: 613-621. http://dx.doi.org/10.1115/1.2840916

Friedrichs S, Hodson HP and Dawes WN. Aerodynamic aspects of endwall filmcooling. ASME J. Turbomach 1997; 119: 786-793. http://dx.doi.org/10.1115/1.2841189

Friedrichs S, Hodson HP and Dawes WN. The design of an improved endwall film-cooling configuration. ASME J Turbomach 1999; 121: 772-780. http://dx.doi.org/10.1115/1.2836731

Yamao H, Aoki K, Takeishi K and Takeda K. An experimental study for endwall cooling design of turbine vanes. IGTC-1987 Tokyo, Japan 1987.

Knost DG and Hole KA. Adiabatic effectiveness measurements of endwall filmcooling for a first stage vane. ASME J Turbomach 2005; 127: 297-305. http://dx.doi.org/10.1115/1.1811099

Ghasemi E, Soleimani S and Lin CX. Control of turbulent combustion flow inside a gas turbine combustion chamber using plasma actuators. Fuels, Combustion and Material Handling, ASME Power and Energy, (doi:10.1115/POWER2015-49499).

Ghasemi E, Soleimani S and Lin CX. Secondary reactions of turbulent reacting flows over a film-cooled surface. Int Commun heat Mass transfer 2014; 55: 93-101. http://dx.doi.org/10.1016/j.icheatmasstransfer.2014.04.007

Ghasemi E, Soleimani S and Lin CX. RANS simulation of methane-air burner using local extinction approach within eddy dissipation concept by OpenFOAM. Int Commun heat Mass transfer 2014; 54: 96-102. http://dx.doi.org/10.1016/j.icheatmasstransfer.2014.03.006

Ghasemi E, Soleimani S, Almas MA. Finite Element Simulation of Jet Combustor Using Local Extinction Approach within Eddy Dissipation Concep. J Adv Therm Sci Research 2014; 1: 57-65. http://dx.doi.org/10.15377/2409-5826.2014.01.02.4

Ghasemi E, McEligot DM, Nolan KP and Crepeau J. A Tokuhiro, RS Budwig, Entropy generation in a transitional boundary layer region under the influence of freestream turbulence using transitional RANS models and DNS. Int Commun heat Mass transfer 2013; 41: 10-16. http://dx.doi.org/10.1016/j.icheatmasstransfer.2012.11.005

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