Results 211 to 220 of about 674 (262)

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

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

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

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

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

Stall Inception Measurements in a High-Speed Multistage Compressor

Journal of Turbomachinery, 1995
This paper presents unsteady measurements taken in a high-speed four-stage aeroengine compressor prior to the onset of aerodynamic flow instabilities. In this experiment, 40 fast-response pressure transducers have been located at various axial and circumferential positions throughout the machine in order to give a very detailed picture of stall ...
J. F. Escuret, V. Garnier
openaire   +1 more source

Stall Inception in the Compressor System of a Turbofan Engine

Journal of Turbomachinery, 1998
Compressor flow instabilities have been the subject of a great number of investigations during the past decade. While most of this research work was done on isolated test-rig compressors, this paper presents stall inception measurements in the compressor system of a two-spool turbofan engine at various power settings.
B. Höss, D. Leinhos, L. Fottner
openaire   +1 more source

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
openaire   +1 more source

Pre-Stall Waves: Precursors to Stall Inception in a Contra-Rotating Axial Fan

Volume 2E: Turbomachinery, 2020
Abstract Stall in a compressor or a fan is often associated with pre-stall waves, that could act as precursors. The present study aims to understand in detail the pre-stall waves leading to instabilities in a low aspect ratio, low hub-tip ratio contra-rotating axial fan.
Manas Madasseri Payyappalli, A. M. Pradeep   +1 more
openaire   +1 more source