Results 151 to 160 of about 24,432 (206)

Stall inception in a transonic axial fan

Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2008
The current paper reports a numerical investigation of stall inception in a transonic compressor rotor, NASA Rotor-67, by using the whole flow passages in the computations. Surface roughness is added to one of the blades in order to trigger rotating stall.
Hossein Khaleghi, M Boroomand, A M Tousi   +2 more
exaly   +2 more sources

Flow Models in Boundary-Layer Stall Inception

Journal of Basic Engineering, 1961
Physical evidence on stall inception from visual studies, mean-velocity-profile correlations, shear measurements, and fluctuations in separating boundary layers in the neighborhood of stall are discussed. Direct visual studies suggest that stall inception in the laminar boundary layer follows the classical model, but does not necessarily do so in the ...
S J Kline
exaly   +2 more sources

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
openaire   +1 more source

Stall Inception in Axial Compressors

Volume 1: Turbomachinery, 1989
Detailed measurements have been made of the transient stalling process in an axial compressor stage. The stage is of high hub-casing ratio and stall is initiated in the rotor. If the rotor tip clearance is small stall inception occurs at the hub, but at clearances typical for a multistage compressor the inception is at the tip.
N. M. McDougall, N. A. Cumpsty, T. P. Hynes   +2 more
openaire   +1 more source

Simulating Stall Inception in a High-Performance Fan

Volume 13A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, 2023
Abstract Aircraft engine performance and stability is limited by the onset of flow instabilities, such as rotating stall or surge. Although much research has been conducted on the subject, the mechanisms by which spike-type stall inception occurs in highspeed machines are still not well understood.
Andrew M. Bedke, Steven E. Gorrell
openaire   +1 more source

Stall Inception Behavior in a Centrifugal Compressor

Volume 1: Turbomachinery, 1994
In studying the stall inception process, while most results were reported for axial compressors, the present paper investigates the stall inception behavior typified in a centrifugal compressor. The test was conducted with a radially-bladed impeller and in a speed range of 8000–14000 rpm.
J. Chen, H. Hasemann, Li Shi, M. Rautenberg   +3 more
openaire   +1 more source

Mid-Span Stall Inception in a Transonic Fan

Volume 2A: Turbomachinery, 2020
Abstract In this paper, steady and unsteady CFD have been used to investigate stall inception for a modern low pressure ratio transonic fan. The computational results are validated against measurement data from a high-speed test facility. CFD validation was approached as a blind test case.
Mark Wilson, Cesare Hall, Hans Verschueren   +2 more
openaire   +1 more source

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.
Der-Cherng Liaw, Eyad H. Abed
openaire   +1 more source

Stall Inception in a Vaneless Diffuser of a Centrifugal Compressor

Volume 6: Turbo Expo 2003, Parts A and B, 2003
This paper presents an experimental and analytical investigation of a rotating stall inception in a vaneless diffuser of a centrifugal compressor. Eight fast-response pressure transducers are equally spaced around the circumference at the inlet and exit of a parallel vaneless diffuser.
Jeong-Seek Kang, Shin-Hyoung Kang
openaire   +1 more source

Stall inception and control in a transonic fan, part A: Rotating stall inception

Aerospace Science and Technology, 2015
Abstract Half-annulus numerical simulations of rotating stall inception have been carried out on a transonic axial compressor rotor. In order to initiate stall, the tip gap of one of the blades in the half-annulus computational domain was increased, and computations were conducted from choke to near-stall and in-stall conditions.
openaire   +1 more source