...-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...

... is also calculated, and both methods predicted similar pressure distributions. In addition, the skin friction coefficients at different blade sections, blade loads such as torque, and axial thrust profiles as well as the aerodynamic power profile for one rotor revolution are computed, and the results...

... 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...

... =  1 / 6 or 0.17. A higher RF signifies better matching of internal aerodynamics, material, and other characteristics of turbomachinery. Equation (3) shows the RF formula. The ideal parameter values for σ , Ma LE , RH, and ϕ , assuming the V103 blade profile are 1.4, 0.67, 1.0, and 0.5...

... of a High Fidelity Aero-Thermodynamic Turbofan Engine Simulation,” ASME Turbo Expo, Jun. 6-10, Vancouver, Canada, Paper No. GT2011-46661). 22 06 2011 05 08 2011 06 03 2012 06 03 2012 aerodynamics flow simulation gas turbines jet engines reduced order systems thermodynamics...

... 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...

... of the Blading Surface Roughness on the Aerodynamic Behavior and Characteristic of an Axial Compressor ,” ASME paper 79-GT-102. 30 Morini , M. , Pinelli , M. , Spina , P. R. , and Venturini , M. , 2010 , “ CFD Simulation of Fouling on Axial Compressor Stages ,” ASME J. Eng. Gas...

.... 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...

... 2011 28 12 2011 28 12 2011 abrasion aerodynamics aerospace components aerospace propulsion friction machine bearings rotors turbomachinery hybrid air foil bearing oil-free aero-propulsion Air/gas foil bearings (AFBs) have shown promise in high-speed micro...

...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...

... ). aerodynamics compressive strength compressive testing creep failure analysis gas turbines nanoindentation nickel alloys scanning electron microscopy superalloys surface roughness thermal barrier coatings 2011 American Society of Mechanical Engineers ...

... (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...

... is feasible and capable of producing ice accretion in a simulated engine environment. As it was the first test of its kind, reporting of these preliminary test results are expected to benefit future experimenters. 19 04 2010 10 05 2010 19 11 2010 19 11 2010 aerodynamics aerospace...

... 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...