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Large eddy simulation for a deep surge cycle in a high-speed centrifugal compressor with vaned diffuser
(The American Society of Mechanical Engineers - ASME, 2015-06)
This paper presents a computational study for a high-speed centrifugal compressor stage with a design pressure ratio equal to 4, the stage consisting of a splittered unshrouded impeller and a wedged vaned diffuser. The aim ...
Large eddy simulation of surge inception and active surge control in a high speed centrifugal compressor with a vaned
(Shahin, I., Alqaradawi, M., Gadala, M., & Badr, O. (2016). Large eddy simulation of surge inception and active surge control in a high speed centrifugal compressor with a vaned diffuser. Applied Mathematical Modelling, 40(23-24), 10404-10418., 2016)
In this study, we present a numerical investigation of active surge control and perfor- mance improvement for an aero engine centrifugal compressor (NASA CC3) using self- recirculating bleed slots with different bleeding ...
Numerical Simulation of Using Combined Active and Passive Stall Control Techniques in Centrifugal Compressors
(ASME, 2015-03)
This study presents a numerical simulation of stall control by using the casing treatment method which represents the passive control technique and also by using the air injection method which represents the active control ...
Numerical Simulation of Stall Development Into Surge and Stall Control Using Air Injection in Centrifugal Compressors
(American Society of Mechanical Engineers, 2014-11)
This study presents a numerical simulation of the formation of rotating stall and the initiation of surge in order to study the connection between stall and surge in centrifugal compressors. Also, the current paper introduces ...
Numerical Investigation of Steady Air Injection Flow to Control Rotating Stall in Centrifugal Compressors
(American Society of Mechanical Engineers., 2014-10)
This paper concerns the role of air injection method in stabilization and stall control in centrifugal compressors. The main aim is to find the best arrangement of air injection parameters such as injection angle and ...
Numerical Simulation and Control of Rotating Stall in a Transonic Centrifugal Compressor
(American Society of Mechanical Engineers., 2014-10)
This study presents a numerical simulation of precursors and characteristics of rotating stall in a centrifugal compressor with vaned diffuser. The aim is to further understand the causes of stall inception, characteristics ...
Influence of changing casing groove parameters on the performance of centrifugal compressors near stall condition
(American Society of Mechanical Engineers., 2015-09)
The casing treatment is an effective method for increasing the stall margin of compressors and enhancing the flow distribution at the blades tip. The present numerical study focuses on making an optimization of the casing ...
Rolling element bearing fault diagnostics using acoustic emission technique and advanced signal processing
(Sage, 2015-06)
Acoustic emission (AE) signal generated from defects in rolling element bearings are investigated using simulated defects and experimental measurements in this paper. Rolling element bearings are crucial parts of many ...
On the aero acoustic and internal flows structure in a centrifugal compressor with hub side cavity operating at off design condition
(Elsevier, 2017-01)
This paper covers the characterization of the acoustic noise and the unsteady flow field of a high speed centrifugal compressor NASA CC3. In order to accurately predict the noise, all analyses are carried out through the ...
Linear stability analysis of finite length journal bearings in laminar and turbulent regimes
(Sage, 2017-02)
Dynamic coefficients of a finite length journal bearing are numerically calculated under laminar and turbulent regimes based on Ng–Pan–Elrod and Constantinescu models. Linear stability charts of a flexible rotor supported ...