Results 251 to 260 of about 2,271 (286)

A Stall Margin Design Method for Planar and Axisymmetric Diffusers

Journal of Fluids Engineering, 1983
An inverse design method is presented which gives the user control over stall margin, or distance from detachment, along the walls of planar and axisymmetric diffusers. It is proposed that optimum diffuser designs have continuous incipient detachment along their wall boundary layers.
R. C. Strawn, S. J. Kline
openaire   +1 more source

Vane Clocking Effects on Stall Margin in a Multistage Compressor

48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2012
Vane clocking is the circumferential indexing of adjacent vane rows with similar vane counts. There are no reports in the open literature regarding clocking effects on stall margin. Recent vane clocking investigations showed a measurable impact on embedded stage efficiency in a three-stage axial compressor research facility.
Natalie R. Smith, Nicole L. Key
openaire   +1 more source

Further Investigation on Transonic Compressor Stall Margin Enhancement With Stall Precursor-Suppressed Casing Treatment

Journal of Turbomachinery, 2015
A kind of casing treatment, named as stall precursor-suppressed (SPS), has been developed recently, which was proved to be able to effectively improve stall margin (SM) without significant efficiency loss in low-speed axial flow compressors and a transonic compressor rotor. In this paper, the effectiveness of the SPS casing treatment is investigated in
Dakun Sun, Chaoqun Nie, Xiaohua Liu, Feng Lin, Xiaofeng Sun   +4 more
openaire   +1 more source

Active Compressor Stability Management via a Stall Margin Control Mode

Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation; Education; Electric Power; Awards and Honors, 2009
An active engine control scheme for protection against compressor instabilities such as rotating stall and surge is presented. Compressor stability detection is accomplished via a parameter known as the correlation measure, which quantifies the repeatability of the pressure fluctuations in the tip region of a compressor rotor.
Yuan Liu, Manuj Dhingra, J. V. R. Prasad
openaire   +1 more source

Development of Stall Margin Instrumentation Designed for use in Icing Conditions

SAE Technical Paper Series, 2003
<div class="htmlview paragraph">This paper presents further development of stall margin instrumentation designed for use in icing conditions. Initial work developing this instrumentation was conducted on a NACA 0018 wing model in Western Michigan University's wind tunnel.<span class="xref">¹</span> The results ...
Erik Pederson, Arthur Hoadley
openaire   +1 more source

Flow and Performance Calculations of Axial Compressor near Stall Margin

AIP Conference Proceedings, 2010
Three‐dimensional flows through a Low Speed Research Axial Compressor were numerically conducted in order to estimate the performance through unsteady and steady‐state simulations. The first stage with the inlet guide vane was investigated at the design point to confirm that the rotor blade induced periodicity exists.
Yoojun Hwang, Shin-Hyoung Kang, M. A. Wahid, S. Samion, N. A. C. Sidik, J. M. Sheriff   +5 more
openaire   +1 more source

Numerical analysis of stall margin indicators in an axial flow fan with tip injection method

CEAS Aeronautical Journal
Pramod B Salunkhe, Kîni Chandrakant R
exaly   +2 more sources

An Experimental Investigation on the Mechanism of Stall Margin Improvement of Casing Treatment

Volume 1: Aircraft Engine; Turbomachinery, 1985
A single-rotor axial flow compressor and a two-dimensional cascade have been tested with and without casing treatment. A three-dimensional flow mechanism of the onset of rotating stall is suggested. It gives good reason to explain the mechanism of stall-margin improvement of casing treatment.
Zhuang Ping, Lu Ya-Jun, Li Bao-Ju, Feng Yu-Chen   +3 more
openaire   +1 more source

Stall Margin Improvement in a Centrifugal Compressor Through Endwall Reshaping

ASME 2012 Gas Turbine India Conference, 2012
This paper presents the results of numerical studies on the effect of endwall reshaping on the performance and stall margin of a centrifugal compressor. The endwall (shroud) of a baseline compressor was reshaped by introducing a convex hump at a location downstream of the inducer where the flow turns from axial to radial direction.
Suhas R. Sope, Quamber H. Nagpurwala
openaire   +1 more source

Review of tip air injection to improve stall margin in axial compressors

Progress in Aerospace Sciences, 2019
Abstract The present paper provides a summary of investigations of the tip air injection, which has been studied for over 30 years to extend the stall margin in axial flow compressors. The review covers the design of injected parameters, understanding of stability-enhancing mechanism, application of active control, and self-recirculation based on tip
Jichao Li, Juan Du, Chaoqun Nie, Hongwu Zhang   +3 more
openaire   +1 more source