...; 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...

...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...

... 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...

... 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...

.... Editor: David Wisler. 20 05 2017 14 06 2017 Cooling Engines Experimental Gas turbine technology Heat transfer Turbines In the quest for ever-increasing gas turbine performance, the firing temperature of these machines has increased steadily to the point where...

.... 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...

... 19, 2017. Editor: David Wisler. 24 11 2016 03 05 2017 Aerodynamics Cavities Cooling Heat transfer Modeling Turbines Unsteady In industrial and aero gas turbines, purge air is bled from the compressor and fed into the turbine rotor–stator disk cavities. This air...

... 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...

...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...

... in the J OURNAL OF E NGINEERING FOR G AS T URBINES AND P OWER . Manuscript received July 5, 2016; final manuscript received November 1, 2016; published online April 25, 2017. Editor: David Wisler. 05 07 2016 01 11 2016 Cooling Heat transfer Heat transfer optimization...

... In the developed experiment, a dog-bone CMC specimen was heated on one face with an infrared lamp heater and cooled on the opposite face by forced air convection, as shown in Fig. 4 , where the thickness of the specimen is shown. A front view of the specimen is presented in Fig. 5 . It was narrowed down at its...

... the critical components in the engine from being damaged under elevated temperature, cooling plays a pivotal role. A small increment of 50 K in firing temperature can result in a 8–9% increase in power output and a 2–4% improvement in cycle efficiency [ 2 ]. Several cooling techniques are employed in real...

... 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...

.... Although the thickness of the T/EBC was thinner in comparison to liner I, the temperature differences across the CMC were lower for liner II; see Figs. 16 and 18 . Furthermore, the distribution in main flow direction differed due to the significantly increased cooling air consumption (+12%) of liner II...