Results 151 to 160 of about 28,166 (195)
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Stall Margin Improvement by Casing Treatment—Its Mechanism and Effectiveness
Journal of Engineering for Power, 1977Experiments 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
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Physics of Fluids
This paper presents a multi-objective design optimization of axial slot casing treatments in a 1.5 stage transonic compressor. To perform the optimization, an in-house optimization design platform is constructed using genetic algorithm and Kriging surrogate model.
Dun Ba +4 more
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This paper presents a multi-objective design optimization of axial slot casing treatments in a 1.5 stage transonic compressor. To perform the optimization, an in-house optimization design platform is constructed using genetic algorithm and Kriging surrogate model.
Dun Ba +4 more
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Stall Margin Improvement by Use of Casing Treatments
Volume 6A: Turbomachinery, 2013The beneficial impact of casing treatments on the stall margin of tip-critical compressors has been proven many times. However, there is still no simple and general method to predict their actual effectiveness. The present work considers the axial velocity deficit that is generally observed at the blade tip. This so called tip-blockage is caused by the
Christian T. Pixberg +4 more
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Using CFD to Improve Stall Margin
Fluids Engineering, 1999Abstract Centrifugal compressors for multi-stage industrial applications must have both high efficiency and stable operation over a wide flow range. CFD analyses were used to evaluate the stall margins of candidate impeller designs compared to a baseline semi-inducer design.
James R. Hardin, Charles F. Boal
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Low speed axial compressor stall margin improvement by unsteady plasma actuation
Journal of Thermal Science, 2014This research investigates the use of single dielectric barrier discharge (SDBD) actuators for energizing the tip leakage flow to suppress rotating stall inception and extend the stable operating range of a low speed axial compressor with a single rotor.
Gang Li +5 more
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Stall Margin Improvement in a Centrifugal Compressor Through Endwall Reshaping
ASME 2012 Gas Turbine India Conference, 2012This 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
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Review of tip air injection to improve stall margin in axial compressors
Progress in Aerospace Sciences, 2019Abstract 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 +3 more
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Stall Margin Improvement in a Transonic Compressor With a Casing Treatment: Flow Mechanism
Journal of Turbomachinery, 2022Abstract A compressor casing treatment with circumferential casing grooves (CCGs) is studied in detail. The primary objective of the current paper is to unearth the main driving fluid mechanism that changes the stall margin in a transonic compressor with CCGs.
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Volume 5: Turbo Expo 2004, Parts A and B, 2004
A computational study is carried out to understand the physical mechanism responsible for the improvement in stall margin of an axial flow rotor due to the circumferential casing grooves. It is shown that the computational tool used predicts an increase in operating range of the rotor when casing groves are present.
Aamir Shabbir, John J. Adamczyk
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A computational study is carried out to understand the physical mechanism responsible for the improvement in stall margin of an axial flow rotor due to the circumferential casing grooves. It is shown that the computational tool used predicts an increase in operating range of the rotor when casing groves are present.
Aamir Shabbir, John J. Adamczyk
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Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2014
Aerodynamic performance of a centrifugal compressor is investigated under various casing treatment configurations of stepped tip gap type, numerically. This technique is introduced as an effective method for improvement of compressor stall margin and consequent enhancement of the compressor overall performance.
Reza Taghavi-Zenouz +2 more
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Aerodynamic performance of a centrifugal compressor is investigated under various casing treatment configurations of stepped tip gap type, numerically. This technique is introduced as an effective method for improvement of compressor stall margin and consequent enhancement of the compressor overall performance.
Reza Taghavi-Zenouz +2 more
openaire +1 more source