Results 51 to 60 of about 32,009 (212)

Experimental Examination of an Axial Compressor as a Basis for an Active Stall Avoidance System

International Journal of Rotating Machinery, 2000
A single-stage subsonic compressor was examined with respect to compressor instabilities. During the inception of rotating stall, the transients of the pressure rise and mass flow were measured as well as their hysteresis.
Richard Schulze, Dietmar K. Hennecke, Thuyen Le, Manfred Glesner   +3 more
doaj   +1 more source

Minimum and Maximum Limit to Number of Myosin II Motors Participating in an Ensemble Motility [PDF]

, 2002
Extensive research on centrifugal compressors has been planned to define diffuser stall limits for a group of stages characterized by low blade-outlet-width-to-impeller-radius-ratio.
Elangovan, Ravikrishnan, Hamnaf, Shabeel, Nath, Sunil, Pandey, Vikas, Rastogi, Khushboo   +4 more
core   +1 more source

Numerical Investigation of Rotating Stall Characteristics and Active Stall Control in Centrifugal Compressors

Volume 2: Simple and Combined Cycles; Advanced Energy Systems and Renewables (Wind, Solar and Geothermal); Energy Water Nexus; Thermal Hydraulics and CFD; Nuclear Plant Design, Licensing and Construction; Performance Testing and Performance Test Codes; Student Paper Competition, 2014
This paper focuses on providing better view for the understanding of rotating stall phenomenon in centrifugal compressors by using numerical simulations and presents a study of the role of air injection method in delaying stall inception by using different injection parameters aiming at increasing the efficiency of this method.
Halawa, Taher, Alqaradawi, Mohamed, Badr, Osama, Gadala, Mohamed S.   +3 more
openaire   +2 more sources

Observations of the Growth and Decay of Stall Cells during Stall and Surge in an Axial Compressor

International Journal of Rotating Machinery, 2017
This research investigated unsteady events such as stall inception, stall-cell development, and surge. Stall is characterized by a decrease in overall pressure rise and nonaxisymmetric throughflow.
Adam R. Hickman, Scott C. Morris
doaj   +1 more source

Analysis of Geometries' Effects on Rotating Stall in Vaneless Diffuser with Wavelet Neural Networks

International Journal of Rotating Machinery, 2007
Wavelet neural network (WNN), which combines the capability of neural network in learning from process and that of wavelet decomposition, was used to study geometry factors on rotating stall in vaneless diffusers.
Chuang Gao, Chuangang Gu, Tong Wang, Bo Yang   +3 more
doaj   +1 more source

Tidal interaction in binary black hole inspiral [PDF]

, 2001
In rotating viscous fluid stars, tidal torque leads to an exchange of spin and orbital angular momentum. The horizon of a black hole has an effective viscosity that is large compared to that of stellar fluids, and an effective tidal torque may lead to ...
A. Buonanno, C. S. Kochanek, C. S. Kochanek, C. W. Misner, J. B. Hartle, J. B. Hartle, J. Baker, J. Bowen, J. M. Bardeen, John T. Whelan, K. S. Thorne, L. Bildsten, L. Blanchet, L. Lehner, P. C. Peters, R. Gleiser, R. H. Price, R. Price, Richard H. Price, S. Brandt, T. Damour, É. É. Flanagan   +21 more
core   +2 more sources

ECL5/CATANA: Transition from Non-Synchronous Vibration to Rotating Stall at Transonic Speed

International Journal of Turbomachinery, Propulsion and Power
Non-synchronous vibration (NSV), flutter, or rotating stall can cause severe blade vibrations and limit the operating range of compressors and fans. To enhance the understanding of these phenomena, this study investigated the corresponding mechanisms in ...
Alexandra P. Schneider, Anne-Lise Fiquet, Nathalie Grosjean, Benoit Paoletti, Xavier Ottavy, Christoph Brandstetter   +5 more
doaj   +1 more source

Unsteady Flow Numerical Simulations on Internal Energy Dissipation for a Low-Head Centrifugal Pump at Part-Load Operating Conditions

Energies, 2019
Dredge pumps are usually operated at part-load conditions, in which the low-solidity centrifugal impeller could experience large internal energy dissipation, related to flow separation and vortices.
Xiaoran Zhao, Yongyao Luo, Zhengwei Wang, Yexiang Xiao, François Avellan   +4 more
doaj   +1 more source

Turbofan compressor dynamics during afterburner transients [PDF]

The effects of afterburner light-off and shut-down transients on compressor stability were investigated. Experimental results are based on detailed high-response pressure and temperature measurements on the Tf30-p-3 turbofan engine.
Kurkov, A. P.
core   +1 more source

Characteristics of Differential Entropy Generation in a Transonic Rotor and Its Applications to Casing Treatment Designs

Machines
Casing treatments improve compressor stability but often at the expense of compressor efficiency. In this study, the differential entropy generation rate (DEGR) was applied to both efficiency evaluation and stall margin estimation.
Jingyuan Ma, Yongsheng Wang, Feng Lin
doaj   +1 more source