Results 221 to 230 of about 1,436 (263)

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
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Low speed axial compressor stall margin improvement by unsteady plasma actuation

Journal of Thermal Science, 2014
This 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, Yanji Xu, Lingyuan Yang, Wei Du, Junqiang Zhu, Chaoqun Nie   +5 more
openaire   +1 more source

Surrogate-Based Shape Optimization of Stall Margin and Efficiency of a Centrifugal Compressor

Journal of Propulsion and Power, 2015
Centrifugal compressors are required to increase their operating range and efficiency, which are limited at low mass flow rates by the rotating stall and surge. This paper presents a surrogate-based multi-objective optimization of a centrifugal compressor to improve its efficiency and stall margin.
Khalfallah, Smail, Ghenaiet, Adel, BENINI, ERNESTO, BEDON, GABRIELE   +3 more
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Correlation Measure-Based Stall Margin Estimation for a Single-Stage Axial Compressor

Volume 3: Controls, Diagnostics and Instrumentation; Education; Electric Power; Microturbines and Small Turbomachinery; Solar Brayton and Rankine Cycle, 2011
This paper presents a method for estimating compressor stall margin and the results of applying the estimation technique to an axial compressor rig. Stall margin estimation is accomplished through the use of a compressor stability detection parameter called the “correlation measure.” The correlation measure captures the periodicity of the pressure in ...
Yuan Liu, Manuj Dhingra, J. V. R. Prasad
openaire   +1 more source

Influence of the inlet distortion on fan stall margin at different rotational speeds

Aerospace Science and Technology, 2020
Abstract The aim of this paper is to develop a reliable and accurate numerical strategy that can be used to study the effects of inlet distortions on the aerodynamic stability of fan blades in aero-engines. As an initial step towards achieving this goal, three-dimensional unsteady Reynolds-Averaged-Navier-Stokes (URANS) simulations were carried out ...
Wenqiang Zhang, Sina Stapelfeldt, Mehdi Vahdati   +2 more
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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

Influence of Compressor Deterioration on Engine Dynamic Behavior and Transient Stall-Margin

Journal of Turbomachinery, 1999
This paper presents an experimental and analytical investigation of compressor stability assessment during engine transient operation. A two-dimensional, linear, compressible, state-space analysis of stall-inception (Feulner et al., 1996, ASME J. Turbomach., 118, pp. 1–10) was modified to account for engine transients and deterioration, with the latter
Z. S. Spakovszky, J. B. Gertz, O. P. Sharma, J. D. Paduano, A. H. Epstein, E. M. Greitzer   +5 more
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Flow Mechanism for Stall Margin Improvement Due to Circumferential Casing Grooves on Axial Compressors

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 new unsteady casing treatment for micro centrifugal compressors to enlarge stall margin

Aerospace Science and Technology, 2020
Abstract Tip clearance flow, particularly tip leakage vortex, is an important source of losses in centrifugal compressor rotors, which limits the stall margin and even causes compressor surge. To address this issue, a passive unsteady flow control method is proposed with equal-circumferential-spacing through-holes on the casing of a micro centrifugal
Guoping Huang, Yuxuan Yang, Shuli Hong, Zepeng Liu, Shuang Du   +4 more
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Stall Margin Improvement in a Transonic Compressor With a Casing Treatment: Flow Mechanism

Journal of Turbomachinery, 2022
Abstract 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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