... thermodynamic loss increase of about 0.7% at low coolant injection rates. Increasing the blowing rates, the additional loss vanishes. 20 09 2010 17 10 2010 20 07 2011 20 07 2011 blades coolants cooling film flow nozzles pressure thermodynamics turbulence In advanced...

... effectiveness results presented here show that for the cases considered, pulsating the flow reduced the effectiveness when compared with a continuous film flow at the same blowing ratio. This finding is in agreement with conclusions made by some researchers on the effect of pulsating but differs from...

... 2011 28 02 2011 blades design engineering film flow flow measurement heat transfer infrared imaging turbines velocimeters Film cooling of gas turbine stator and rotor airfoil surfaces has played a major role in preserving the structural integrity of these hot-section...

... is defined as the trailing edge of the slot). 02 10 2009 18 01 2010 29 11 2010 29 11 2010 cooling film flow heat measurement turbines In order to increase both thermal efficiency and power output, modern day gas turbines are manufactured to operate at temperatures...

... are sufficiently cooled while the use of compressor air is minimized to achieve optimum cycle efficiencies. deposition roughness film cooling blades cooling film flow turbines turbulence 27 07 2009 21 08 2009 11 11 2010 11 11 2010 Area-averaged heat flux ratio...

... view of compound angle film cooling jet 23 12 2008 26 01 2009 09 09 2010 09 09 2010 ash blades coolants erosion film flow flow simulation particle size turbines A severe operating environment and residual foulants in fuels derived from alternative sources...

... of the standard tip, and all modifications contributed significantly to the area affected by the hot tip leakage flow and the total heat flux. blades film flow flow simulation gas turbines heat transfer rotors turbulence In unshrouded axial turbines, clearance gaps between the rotor blades...

... and Strouhal numbers. More comparisons are presented below. The good time averaged agreement provides confidence to proceed with study of the phase averaged η * results. 06 06 2007 22 06 2007 31 07 2008 anemometry cooling film flow jets plates (structures) temperature...

... configuration and present the first test results under machine operating conditions. 28 07 2006 08 08 2006 jets film flow gas turbines cooling aerodynamics vortices film cooling film-cooling effectiveness double-jet kidney vortices Due to high turbine inlet temperatures...

... flows, and many other flows. The possibility of reducing the duty cycle and actual film flow rate significantly without losing film effectiveness can contribute significant improvements in turbine performance. There have been a few studies that have addressed bulk flow pulsations ( 9 10 11 12...

... 2005 16 01 2006 film flow cooling flow measurement anemometry jets Film cooling has been studied extensively in order to provide improved cooling of the airfoils in gas turbine engines and thus increase the life of the airfoils and allow for higher turbine inlet temperatures...

... was substantially more than either showerhead or suction side alone, but less than the sum of the two individual effects. 01 10 2004 01 02 2005 film flow cooling turbines blades surface roughness aerodynamics turbulence New turbine stage components are typically run for several...

... from the expended cooling air, film cooling configurations have to be very accurately adjusted to the local thermal and aerodynamic conditions, i.e., the local heat load. boundary layer turbulence cooling film flow Mach number supersonic flow gas turbines heat transfer 16 June...

... 26 03 2004 nozzles turbulent diffusion temperature distribution gas turbines film flow cooling boundary layer turbulence Nonuniform temperature profiles, or “hot streaks” exiting the combustor in a gas turbine engine play a large role in failures of the first stage nozzle guide...

... No. 2002-GT-30520. Review Chair: E. Benvenuti. 03 June 2002 10 October 2001 23 04 2003 turbines aerodynamics cooling film flow flow simulation stagnation flow Navier-Stokes equations To achieve high cycle efficiency in modern gas turbine engines, the temperature...

... and Aeroengine Congress and Exhibition, Amsterdam, The Netherlands, June 3–6, 2002. Manuscript received by the IGTI, November 21, 2001. Paper No. 2002-GT-30176. Review Chair: E. Benvenuti. 03 June 2002 21 November 2001 23 01 2003 gas turbines cooling heat transfer turbulence film...

... by the IGTI, November 2, 2001. Paper No. 2002-GT-30174. Review Chair: E. Benvenuti. 03 June 2002 02 November 2001 07 11 2002 gas turbines heat transfer cooling film flow flow visualisation velocity measurement turbulence jets Film cooling of a turbine vane typically...

... at the International Gas Turbine and Aeroengine Congress and Exhibition, Amsterdam, The Netherlands, June 3–6, 2002. Manuscript received by the IGTI, November 29, 2001. Paper No. 2002-GT-30180. Review Chair: E. Benvenuti. gas turbines cooling heat transfer film flow temperature measurement flow measurement...

... 2002 gas turbines heat transfer film flow flow visualisation laser Doppler anemometry turbulence jets cooling In an actual gas turbine engine, devices such as swirlers and dilution jets are added to the combustor to sufficiently mix the air and fuel for optimum combustion. However...

... of additional parameters. Together with the correlation of the adiabatic effectiveness it provides an immediate determination of the streamwise heat flux reduction distribution of cylindrical hole film-cooling configurations. gas turbines cooling heat transfer film flow flow measurement jets...