...-mail:  i.goulos@cranfield.ac.uk e-mail:  devaiah.nalianda@cranfield.ac.uk e-mail:  v.pachidis@cranfield.ac.uk 27 08 2020 11 09 2020 13 01 2021 compound rotorcraft coaxial rotor redundant controls optimization gas turbines environmental impact aerodynamics control aerospace...

...@northumbria.ac.uk 19 10 2020 29 10 2020 04 01 2021 wind turbines aerodynamics aeroelasticity computational fluid dynamics nonlinear frequency domain solution method The power generation from renewable energy resources has been significantly increased in recent years. Among...

... resolving the small scale and large number of cooling holes is impractical at the preliminary design phase. This paper presents an alternative approach for predicting aerodynamic performance of TCC systems using a “smart” porous media (PM) to replace regions of cooling holes. Numerically CFD defined...

...Chongfei Duan; Hisataka Fukushima; Kiyoshi Segewa; Takanori Shibata; Hidetoshi Fujii The basic principle of a distinct idea to reduce an aerodynamic mixing loss induced by the difference in tangential velocity between mainstream flow and rotor shroud leakage flow is presented in “Part I: Design...

... aerodynamic loss due to mixing with the mainstream flow. In order to reduce this mixing loss, two distinct ideas for rotor shroud exit cavity geometries were investigated using computational fluid dynamics (CFD) analyses and experimental tests. One idea was an axial fin placed from the shroud downstream...

... Aerodynamics Aerospace Design optimization Engines Experimental Gas turbine technology Particulate Propulsion systems One common source of foreign object damage encountered by aircraft with gas turbine engines is sand ingestion, which often occurs when these aircraft operate in arid or desert...

... of a High Fidelity Aero-Thermodynamic Turbofan Engine Simulation,” ASME Turbo Expo, Jun. 6-10, Vancouver, Canada, Paper No. GT2011-46661). aerodynamics flow simulation gas turbines jet engines reduced order systems thermodynamics transfer functions Real-time engine simulation is the topic...

... to correctly evaluate the impinging jet mass flow rate, the characterization of holes discharge coefficient is a compulsory activity. In this work, an aerodynamic analysis of jet arrays for active clearance control was performed; the aim was the definition of a correlation for the discharge coefficient (C d...

... aspect of this paper is that the effects of load types, namely resistive heating, battery charging, and grid connection were also investigated. It was shown that major contributors to improved starting performance are aerodynamic improvements, reduction of inertia, and simply changing the pitch angle...

... 01 05 2011 03 01 2012 03 01 2012 aerodynamics blades compressors gas turbines maintenance engineering surface roughness Fouling of compressor blades is an important mechanism leading to performance deterioration in gas turbines over time. Fouling is caused...

.... Probabilistic simulation methods allow for the generation of a sampled set of blades that statistically corresponds to the measured one. This technique was applied to generate 4000 sampled blades in order to investigate the influence of a nonaxisymmetric blading. It was found that the aerodynamic performance...

.... 20 DellaCorte , C. , 1998 , “ A New Foil Air Bearing Test Rig for use to 700C and 70,000 RPM ,” STLE Tribol. Trans. , 41 ( 3 ), pp. 335 – 340 . 10.1080/10402009808983756 abrasion aerodynamics aerospace components aerospace propulsion friction machine bearings rotors...

...Kwen Hsu; Daniel Hoyniak The blade geometric variations are usually ignored in the prediction of bladed disk aerodynamic damping values. This situation is the result of the high computational cost associated with the full-annulus unsteady flow CFD models required to account for these blade...

...Stephan Burmberger; Thomas Sattelmayer A frequently employed method for aerodynamic flame stabilization in modern premixed low emission combustors is the breakdown of swirling flows; with carefully optimized tailoring of the swirler, a sudden transition in the flow field in the combustor can...

...   μ m ) , and featured a nondepleted β -phase zone. aerodynamics compressive strength compressive testing creep failure analysis gas turbines nanoindentation nickel alloys scanning electron microscopy superalloys surface roughness thermal barrier coatings...

... (UAV) that is equipped with a seven-sensor fast-response aerodynamic probe (F7S-UAV). The autonomous UAV enables high spatial resolution ( ∼ 6.3 % of rotor diameter) measurements, which hitherto have not been accomplished around full-scale wind turbines. The F7S-UAV probe developed at ETH Zurich...

... and the robustness of the optimum mistuning patterns has been demonstrated. The combined effect of the aerodynamic and structural damping on the response reduction is assessed. It is shown that the new phenomenon is of major practical significance and has to be taken into account in analysis of the forced response...

...Anthony G. Sheard; Alessandro Corsini; Stefano Bianchi This study describes the development of a novel stall-detection methodology for low-speed axial-flow fans. Because aerodynamic stall is a major potential cause of mechanical failure in axial fans, effective stall-detection techniques have had...

.... aerodynamics aerospace industry freezing jet engines 19 04 2010 10 05 2010 19 11 2010 19 11 2010 2011 American Society of Mechanical Engineers ...

... in pressure through diffusion. As the operating pressure in a compressor increases, the fluid-rotor interaction at the seals and impellers become more important. Also, the new generation of megascale liquefied natural gas compressors is dependent on accurate assessment of these forces. The aerodynamic forces...