Results 41 to 50 of about 32,009 (212)
Relationship between frequencies of pressure oscillations and rotor speed under rotating stall [PDF]
, 2002 The correlation between the frequencies of pressure oscillation ωosc and the rotor speed (frequencies of rotor rotation ωRR) under established rotating stall were determined by three methods: directly from the time diagram of the oscillation process ...
Levy, Y. +3 more
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Investigation of Rotating Stall Phenomenon and Optimization in Mixed-Flow Waterjet Propulsion Device
Advances in Materials Science and Engineering, 2020 The rotating stall is a kind of flow phenomenon in the impeller harming the navigation speed of vessels propelled by a waterjet propulsion device when the waterjet propulsion device operates at the small flow rate conditions.
Can Luo +6 more
doaj +1 more source
Cooled miniature pressure transducers effective at high temperatures [PDF]
, 1968 Miniature pressure transducers in compact water-cooled mounts are placed in hotter and more confined environments than previously possible. It quantitatively measures high frequency total pressure fluctuations resulting from rotating stall in an axial ...
Armentrout, E. C.
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Advances in Mechanical Engineering, 2014 Unsteady flow structures can lead to severe vibration in centrifugal pump if the eigenfrequency of the rotor is equal to excitation frequency. In order to reduce rotor-stator interaction in centrifugal pump, a special slope volute was proposed.
Ning Zhang +4 more
doaj +1 more source
Active Control of an Axial Flow Compressor via Pulsed Air Injection [PDF]
, 1996 This paper presents the use of pulsed air injection to control the onset of rotating stall in a low-speed, axial flow compressor. By measuring the unsteady pressures near the rotor face, a control algorithm determines the magnitude and phase of the
Behnken, Robert L. +2 more
core +1 more source
Gas Turbine Aerodynamics Improvement Via a Design of Intelligent Fractional Control
Journal of Mechanical Engineering, 2021 Gas turbines are complex processes characterized by the instability and uncertainty of various sources. The range of useful operating in an axial compressor which is part of a turbine gas is limited by aerodynamic instabilities that are surge and ...
Abdesselam Debbah +2 more
doaj +1 more source
A stall‐delay model for rotating blades [PDF]
PAMM, 2007 AbstractThe paper is aimed at describing a fundamental phenomenon: the effect of rotation on the inboard blade boundary layer on a wind turbine. The three‐dimensional incompressible steady momentum integral boundary‐layer equations are used to predict the boundary‐layer growth and limiting streamline angles on the blade surface for both attached and ...
Horia Dumitrescu, Vladimir Cardos
openaire +1 more source
Rotating Stall Inception Prediction Using an Eigenvalue-Based Global Instability Analysis Method
International Journal of Turbomachinery, Propulsion and PowerThe accurate prediction of rotating stall inception is critical for determining the stable operating regime of a compressor. Among the two widely accepted pathways to stall, namely, modal and spike, the former is plausibly believed to originate from a ...
Shenren Xu +7 more
doaj +1 more source
Stall and leading-edge vortex in a centrifugal compressor with vaned diffuser
Nihon Kikai Gakkai ronbunshu, 2015 The experimental and CFD analysis were conducted to investigate the relationship between stall and leading-edge vortex (LEV) in a centrifugal compressor with vaned diffuser.
Nobumichi FUJISAWA +2 more
doaj +1 more source
Biofluiddynamic scaling of flapping, spinning and translating fins and wings [PDF]
, 2009 Organisms that swim or fly with fins or wings physically interact with the surrounding water and air. The interactions are governed by the morphology and kinematics of the locomotory system that form boundary conditions to the Navier–Stokes (NS ...
Dickinson, Michael H., Lentink, David
core +2 more sources