Results 211 to 220 of about 1,436 (263)

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
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An Evaluation Approach for the Stall Margin Enhancement With Stall Precursor-Suppressed Casing Treatment

Journal of Fluids Engineering, 2015
It is known that a kind of stall precursor-suppressed (SPS) casing treatment can be used to enhance compressor stall margin (SM) without recognizable efficiency loss. The further requirement in this regard is to develop an effective way to determine the variation range of the SM improvement during the design of such SPS casing treatment.
Dakun Sun, Xiaohua Liu, Xiaofeng Sun
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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

Effects of injection frequency on the rotor stall margin

Science in China Series E: Technological Sciences, 2010
The stall margin of compressor could be improved effectively by rotor tip injection, and the periodic injection is commonly used in the research. The purpose of this work is to investigate the influence of injection frequency on the rotor stall margin.
JunWei Zhou, AnPing Hou, Sheng Zhou
openaire   +1 more source

The Effect of Steam Ingestion on Transonic Rotor Stall Margin

Volume 6: Turbo Expo 2007, Parts A and B, 2007
The adverse effect of high temperature water vapor on the stall margin of a transonic compressor rotor is investigated. This type of flow condition is experienced during the takeoff of carrier born aircraft. An experiment is designed to replicate these flow conditions on a transonic compressor test rig.
A. J. Gannon, G. V. Hobson, T. A. Payne, S. E. Zarro   +3 more
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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

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

Stall Margin Improvement by Casing Treatment—Its Mechanism and Effectiveness

Journal of Engineering for Power, 1977
Experiments on the effect of casing treatment were carried out using low-speed axial-flow compressors. Results on the overall compressor performance and on the flow through the blade row as well as the flow within the treatment slots are presented. Then, based on the experiments, a possible mechanism of the stall margin improvement is suggested.
H. Takata, Y. Tsukuda
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
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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