... temperature of 1873 K [ 40 ]. While the performance curves shown here for cycles optimized for work, heat and matter transfers do not include the penalty of practical aspects such as blade cooling, sealing, etc., they are evaluated for a turbine inlet temperature over 200 deg lower, yet indicate comparable...

...Feijia Yin; Floris S. Tiemstra; Arvind G. Rao As the overall pressure ratio (OPR) and turbine inlet temperature (TIT) of modern gas turbines are constantly being increased in the pursuit of increasing efficiency and specific power, the effect of bleed cooling air on the engine performance...

... is lower than the pressure of exhaust gas in Allam Cycle due to the operating pressure restrictions of the EFG used to simulate the syngas combustor. The column operating pressures did not exceed 19.3 bar (280 psig). In the test, the exhaust gas is cooled in a tube-in-tube air heat exchanger before...

... using empirical research methods. The engine was a 118 cm 3 displacement, single cylinder ICE. Energy pathways were characterized as a percentage of the total chemical energy available in the fuel. Energy pathways were characterized into four categories: brake power, cooling load, exhaust sensible...

...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...

... or sticking on metal walls. The results indicate that due to the particle inertia and combustor geometry, the volcanic ash concentration in the NGV cooling passage generally increases with ash size and density, and is less sensitive to inlet velocity. It can reach three times as high as that at the air inlet...

... downstream rows were tested. First row jet Reynolds numbers ranging from 50,000 to 160,000 were reported. Heat transfer and pressure data have been presented for all the cases. Several parameters pivotal in the studying of impingement array cooling were analyzed, including the pressure loss, laterally...

.... The sensitivity to the modeling time steps employed is explored. An impingement geometry case is used to assess the validity of the technique, and a passage with film cooling holes is interrogated. Differences are seen for all sticking and solid phase motion models employed. At small solid particle sizes...

... ( ( P − P ∞ ) / ( P 0 , rel − P ∞ ) ) C w = dimensionless cooling flow rate ( m ˙ purge / ( μ   r b ) ) M is = isentropic Mach number ( ( 2 / ( γ − 1 ) [ ( P 0 / P ∞ ) ( γ...

... inlet temperature (TIT) have been made mainly through innovations in cooling technology, specifically convective cooling schemes. Laser additive manufacturing (LAM) is a promising manufacturing technology that uses lasers to selectively melt powders of metal in a layer-by-layer process to directly...

... in the grid A thermally efficient cooling system of the blades inside the high-pressure turbine has to keep the metal temperature below an acceptable limit while, at the same time, minimizing coolant mass flow rates and pressure drop penalties. A region causing especially high pressure losses...

...Xueying Li; Jing Ren; Hongde Jiang The switch from diffusive combustion to premixed combustion in a modern gas turbine changes the combustor exit temperature profile to a more uniform one. This will directly affect the cooling of the first stage vane especially the endwall region. A typical endwall...

... Combustors Composites Cooling Experimental Gas turbine technology Heat transfer Modeling Radiation Stress analysis Temperature Thermal With the goal of improving the fuel efficiency and environmental friendliness of aircraft, engine manufacturers are developing ceramic materials...

... September 23, 2016; final manuscript received December 15, 2016; published online March 7, 2017. Editor: David Wisler. 23 09 2016 15 12 2016 Computational fluid dynamics Convective heat transfer Cooling Experimental Gas turbine technology Heat transfer Internal flow...

... and to minimize the engine specific fuel consumption. To prevent overheating of the materials and thus the reduction of component life, an internal flow system is required to cool and protect the critical engine parts. Previous studies have shown that the insertion of a deflector plate in turbine cavities leads...

... researchers have reported that the system might fail without an appropriate cooling mechanism. The objective of the current research is to demonstrate the reliability of GFBs installed in the hot section of a micro-gas turbine (MGT). For the cooling of the GFBs, we designed a secondary flow passage...

...A. Duncan Walker; Bharat Koli; Liang Guo; Peter Beecroft; Marco Zedda To manage the increasing turbine temperatures of future gas turbines a cooled cooling air system has been proposed. In such a system some of the compressor efflux is diverted for additional cooling in a heat exchanger (HX...

... for publication in the J OURNAL OF E NGINEERING FOR G AS T URBINES AND P OWER . Manuscript received July 12, 2016; final manuscript received August 25, 2016; published online January 4, 2017. Editor: David Wisler. 12 07 2016 25 08 2016 Computational Computational fluid dynamics Cooling...

... November 22, 2016. Assoc. Editor: Riccardo Da Soghe. 15 04 2016 29 08 2016 Aerodynamics Aerospace applications Computational fluid dynamics Cooling Experimental Gas turbine technology Heat exchangers In recent aero-engine core concept development, heat exchangers have...

... Computational fluid dynamics Cooling Experimental Finite element The emission limits for minority species (especially nitric oxides (NO x ) and also carbon monoxide (CO), unburned hydrocarbons (UHC), and soot) are lowered more and more by the International Civil Aviation Organization. Carbon dioxide...