... to predict the sealant distribution which makes the numerical sealing effectiveness in front and aft cavities agree well with experimental data. The accuracy of the numerical method is verified. The sealing effectiveness in cavities and the flow field in rim seal clearance are analyzed, and the film cooling...

...Ruiqin Wang; Xin Yan Film cooling effect on trailing edge cutback with land extensions (i.e., landed case) was numerically investigated with the delayed-detached eddy simulation (DDES) method. At three rib geometries (i.e., inline rib arrays, six-row pin-fin arrays, and five-row pin-fin arrays...

...Jinjin Li; Xin Yan; Kun He; Richard J. Goldstein The rectangular vortex generator pairs (RVGPs) are arranged upstream of the film cooling holes to achieve better coolant coverage on the endwall near the pressure-side corner area. The endwall film cooling effectiveness distributions under transonic...

...Mohamed Qenawy; Lin Yuan; Yingzheng Liu; Di Peng; Xin Wen; Wenwu Zhou Wind-tunnel testing of turbines cascade is an important technique for quantifying the realistic conditions of turbine-vane film cooling. However, the complex and expensive facilities needed for the multipassage design...

...Jian Liu; Honghu Ji Investigations on infrared (IR) radiation suppression of axisymmetric vectoring exhaust nozzle (AVEN) are meaningful, due to the requests for maneuverability and IR stealth capability of aircrafts. In this paper, the synthetic suppression scheme of film cooling and low...

...Alejandro M. Briones; Scott D. Stouffer; Konstantinos Vogiatzis; Keith Rein; Brent A. Rankin The effects of effusion and film cooling momenta on combustor flow fields are investigated. Steady, compressible three-dimensional (3D) simulations are performed on a single-swirler combustor using Reynolds...

... transfer coefficient, adiabatic film cooling effectiveness, and overall effectiveness of the endwall were performed. The temperature-sensitive paint (TSP) and pressure-sensitive paint (PSP) were used to acquire these parameters. The conjugate heat transfer characteristic of endwall with film cooling...

...Jeremy B. Nickol; Randall M. Mathison; Michael G. Dunn; Jong S. Liu; Malak F. Malak Measurements are presented for a high-pressure transonic turbine stage operating at design-corrected conditions with forward and aft purge flow and blade film cooling in a short-duration blowdown facility. Four...

...H. Ma; Q. Zhang; L. He; Z. Wang; L. Wang A basic attribute for turbine blade film cooling is that coolant injected should be largely passively convected by the local base flow. However, the effective working of the conventional wisdom may be compromised when the cooling injection strongly interacts...

... Convective heat transfer Experimental Film cooling Heat transfer The rotor blade tip is the most vulnerable part in high-pressure (HP) turbine. In addition to being a major contributor to the loss of turbine efficiency, the over-tip-leakage (OTL) flow introduces very high thermal load to the tip...

...Guanghua Wang; Gustavo Ledezma; James DeLancey; Anquan Wang Gas turbines overall efficiency enhancement requires further increasing of the firing temperature and decreasing of cooling flow usage. Multihole (or effusion, or full-coverage) film cooling is widely used for hot gas path components...

... dynamics Cooling Film Film cooling Fluids Gas turbine technology Turbulent Modern gas turbine combustors frequently operate at fuel lean conditions in order to reduce environmentally harmful emissions. Consequently, a large amount of air is used for the fuel injection system, reducing...

...-Cooling Performance Under Realistic Inlet Conditions ,” J. Propul. Power , 28 ( 4 ), pp. 799 – 810 . 10.2514/1.B34365 [6] Werschnik , H. , Krichbaum , A. , and Schiffer , H.-P. , 2015 , “ The Influence of Combustor Swirl on Turbine Stator Endwall Heat Transfer and Film Cooling...

...; published online August 16, 2016. Editor: David Wisler. 18 06 2016 22 06 2016 Aerothermodynamics Burners Combustors Computational fluid dynamics Convection Convective heat transfer Cooling Film cooling Gas turbine technology Heat transfer Modeling Swirling Turbulence...

... system, which generates film cooling in the first part of the combustor liner. In order to overcome some well-known limitations of Reynolds-averaged Navier–Stokes (RANS) approach, e.g., the underestimation of mixing, the simulations were performed with hybrid RANS–large eddy simulation (LES) models...

... Cooling ,” ASME J. Eng. Power , 95 ( 3 ), pp. 180 – 184 . 10.1115/1.3445720 [4] Crawford , M. E. , Kays , W. M. , and Moffat , R. J. , 1980 , “ Full-Coverage Film Cooling—Part 1: Comparison of Heat Transfer Data for Three Injection Angles ,” ASME J. Eng. Power , 102 ( 4 ), pp...

... Wisler. 03 03 2015 14 03 2015 08 04 2015 There have been numerous studies of the behavior of shaped film cooling holes for turbine applications. It is known that the introduction of coolant is an unsteady process, and a handful of studies have described and characterized...

... received January 31, 2015; published online April 28, 2015. Editor: David Wisler. 29 11 2014 31 01 2015 28 04 2015 Two-dimensional thermal profiles were experimentally measured downstream of a single row of film cooling holes on both an adiabatic and a matched Biot number model...

... such as recirculations, vortex breakdown, and precessing vortex core (PVC) that may deeply interact in the near wall region of the combustor liner. This interaction makes challenging the estimation of film cooling distribution, commonly generated by slot and effusion systems. The main purpose of the present work...

...Benjamin Kirollos; Thomas Povey There have been numerous studies reporting film effectiveness for film rows in isolation, which have led to correlations that are used for preliminary design. Many applications require multiple film cooling rows. Although there is some published data which deal...