Results 221 to 230 of about 674 (262)

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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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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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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Stall Inception in a High-Speed Centrifugal Compressor

Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, 2001
Stall inception in a high-speed centrifugal compressor has been examined. The main objective was to find stall precursor and to develop a reliable stall warning method. Eight equally spaced fast-response pressure transducers in the inducer detected the spatial structure of small amplitude perturbations, via spatial Fourier transform, as stall is ...
Jeong-Seek Kang, Shin-Hyoung Kang
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Spatial Correlation Based Stall Inception Analysis

Volume 6: Turbo Expo 2007, Parts A and B, 2007
Investigations of stall inception and compressor pre-stall behavior have used a variety of techniques to make inferences about the mechanisms of rotating stall inception. Many of these techniques utilized data from arrays of circumferentially spaced hot-wires or high frequency response pressure transducers.
Joshua D. Cameron, Scott C. Morris
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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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Numerical Investigation of Inlet Distortion on the Stall Inception of a Radial Compressor

Volume 2D: Turbomachinery, 2014
In this paper unsteady CFD computations are used to study the stability and the rotating stall inception of a transonic radial compressor, considering two different configurations influencing the inlet flow. The prediction of the surge and stall limit for a centrifugal compressor is a key parameter for operating such machines, and hence requires ...
VAGNOLI, STEFANO, Verstraete, T.
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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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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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Investigation on the Stall Inception Circumferential Position and Stall Process Behavior in a Centrifugal Compressor With Volute

Volume 2B: Turbomachinery, 2018
The present paper numerically and experimentally investigates the stall inception mechanisms in a centrifugal compressor with volute. Current studies about stall inception pay more attention on the axial compressors than the centrifugal compressors; especially, the circumferential position of stall inception onset and the stall process in the ...
Hanzhi Zhang, Ce Yang, Dengfeng Yang, Wenli Wang, Changmao Yang, Mingxu Qi   +5 more
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