Results 301 to 310 of about 24,787 (347)

Stall Inception in Axial Flow Compressors

Journal of Turbomachinery, 1991
Studies have been conducted on two laboratory test compressors to investigate the process leading to the formation of finite amplitude rotating stall cells. The measurements were obtained from circumferential arrays of hot wires and were spatially and temporarily analyzed to show that modal perturbations are not always present prior to stall, and when ...
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Review of Stall Inception in Turbocompressors

Journal of Fluid Machinery, 2003
Stall inception means the phenomena of rotating stall initiation. The initiation mechanism of rotating stall, the existence of stall precursor, the behavior of stall precursor, stall warning scheme and control scheme are the main interests in stall inception research. Compared to the studies on rotating stall which has long history, the stall inception
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Computations of bladerow stall inception in transonic flows

The Aeronautical Journal, 1999
AbstractA three-dimensional unsteady Navier-Stokes solver has been used to simulate stall inception in a single row ten passage segment of a transonic fan, the NASA rotor-67. At subsonic flow conditions, the 3D results illustrate a rotating stall inception with short scale part-span cells rotating at around 80% rotor speed, similar to that observed in ...
L. He, J. O. Ismael
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Active control of compressor stall inception: a bifurcation-theoretic approach

Automatica, 1996
Active control of the onset of stall instabilities in axial flow compression systems is pursued using bifurcation analysis of a dynamical model proposed by Moore and Greitzer. The state variables of this model are the mass flow rate, pressure rise, and the amplitude of the first-harmonic mode of the asymmetric component of the flow.
Liaw, Der-Cherng, Abed, Eyad H.
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When are Nonlinearities Important at Stall Inception?

Volume 1: Turbomachinery, 1994
Recent experimental work has shown that in some compressors, the nonaxisymmetric disturbance leading to loss of stability appears as a localised phenomena, rather than a travelling sine wave which spans the entire circumference, suggesting that nonlinear effects appear very early in the evolution of the disturbance.
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Computational Approach for Predicting Stall-Inception in Multi-Stage Axial Compressors

41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2005
A new time-accurate computational approach for predicting stall inception due to long- and short-wavelength phenomena in multistage axial compressors is introduced. The computational approach uses a time-accurate single-blade-passage multi-blade-row strategy that includes many of the primary unsteady modes associated with the early symptoms of stall ...
Roger L. Davis, Jixian Yao
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Stall inception in a multistage high-speed axial compressor

Journal of Propulsion and Power, 1993
A comprehensive study has been conducted into the inception of stall in a multistage high-speed axial flow compressor. The compressor tested was a highly loaded, four-stage axial compressor representing the state of the art in current design technology. Data were taken at a variety of speeds, both with and without inlet distortion.
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On the Mechanism of Spike Stall Inception and Near Stall Nonsynchronous Vibration in an Axial Compressor

Journal of Engineering for Gas Turbines and Power, 2020
Abstract The aerodynamic and aeroelastic behavior of an engine-like transonic compressor stage is investigated in this paper. Simulations were carried out for the transonic compressor at the Technical University of Darmstadt using the AU3D flow solver.
Daniel Möller, Heinz-Peter Schiffer
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3D Unsteady Computation of Stall Inception in Axial Compressors

Volume 7: Turbomachinery, Parts A, B, and C, 2010
Rotating stall is one of the unsteady phenomena in multistage axial compressors that will damage both of performance and service life of aero engines. Stall inception is a dynamic process including appearance of pre-stall disturbance, evolvement of disturbances into stall cells, and development of stall cells.
Baofeng Tu, Jun Hu, Yong Zhao
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Effect of RANS Method on Stall Inception Eigenvalue Approach

Volume 2B: Turbomachinery, 2017
The effect of mesh, turbulence model and discretization scheme in Reynolds-averaged Navier-Stokes method (RANS) on a stall inception eigenvalue approach is investigated in a transonic compressor rotor. The most influencing flow structures on the result of eigenvalue approach are also identified.
Zhe Xie, Yangwei Liu, Xiaohua Liu, Lipeng Lu, Xiaofeng Sun   +4 more
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