Results 71 to 80 of about 24,432 (206)
Control load envelope shaping by live twist [PDF]
Rotor control systems experience a rapid load growth resulting from retreating blade stall during flight conditions of high blade loading or airspeeds.
Mirick, P. H., Tarzanin, F. J., Jr.
core +1 more source
Aerodynamic Inner Workings of Circumferential Grooves in a Transonic Axial Compressor [PDF]
, 2007 The current paper reports on investigations of the fundamental flow mechanisms of circumferential grooves applied to a transonic axial compressor. Experimental results show that the compressor stall margin is significantly improved with the current set ...
Hah, Chunill +2 more
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Numerical Investigation of Kelvin–Helmholtz Instability in a Centrifugal Compressor Operating Near Stall [PDF]
, 2016 The present work details the occurrence of the Kelvin–Helmholtz instability in a centrifugal compressor operating near stall. The analysis is based on unsteady three-dimensional simulations performed on a calculation domain covering the full annulus for ...
Binder, Nicolas +5 more
core +3 more sources
Energies, 2017 A low-speed counter-rotating axial flow compressor (CRAC) with single circumferential grooved casing treatment (CT) was investigated numerically. Both steady and time-accurate numerical calculations were performed to study the effects of the single ...
Xiaochen Mao, Bo Liu, Hang Zhao
doaj +1 more source
Quantum Zeno effect in correlated qubits
, 2018 Near term quantum hardware promises to achieve quantum supremacy. From a quantum dynamical point of view, however, it is not unambiguously clear whether fundamental peculiarities of quantum physics permit any arbitrary speed-ups in real time.
Deffner, Sebastian, Šafránek, Dominik
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Research Overview on Spike Stall Inception and Slotted Casing Treatment in Aeroengine Compressors
AerospaceRotating stall and surge are complex, unsteady flow instability phenomena in aeroengine compressors that pose serious threats to the safety and reliability of both the compressor and the engine as a whole.
Qianfeng Zhang +2 more
doaj +1 more source
MachinesOperational safety and fuel efficiency are critical, yet often conflicting, objectives in modern civil get engine designs. Optimal efficiency operating conditions are typically close to unsafe regions, such as compressor stalls, which can cause severe ...
Anish Thapa, Jichao Li, Marco P. Schoen
doaj +1 more source
Prediction of rotating stall and cavitation inception in pump turbines
IOP Conference Series: Earth and Environmental Science, 2010 The current development of modern pump storage plants aims towards a higher flexibility in operation, an extended operation range of the hydraulic machine, especially in the pumping mode, and a higher reliability. A major design target for state-of-the-art reversible Francis-type pump turbines is to find an optimal balance between pumping and ...
D Anciger, A Jung, T Aschenbrenner
openaire +1 more source
Analysis of the development of dynamic stall based on oscillating airfoil experiments [PDF]
The effects of dynamic stall on airfoils oscillating in pitch were investigated by experimentally determining the viscous and inviscid characteristics of the airflow on the NACA 0012 airfoil and on several leading-edge modifications.
Carr, L. W. +2 more
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International Journal of Rotating Machinery, 2012 The passive control method for surge and rotating stall in centrifugal compressors by using a nozzle injection system was proposed to extend the stable operating range to the low flow rate.
Toshiyuki Hirano +2 more
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