Inspection of Centrifugal Blower by Varying Different Blade Configuration using CFD

doi:10.35940/ijeat.a1779.1010120

Inspection of Centrifugal Blower by Varying Different Blade Configuration using CFD

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.a1779.1010120 ◽

2020 ◽

Vol 10 (1) ◽

pp. 210-214

Keyword(s):

Working Conditions ◽

Impeller Speed ◽

Centrifugal Blower ◽

Disturbance Model

This examination points towards the advancement of an enhanced plan of a radiating blower comprising of different fan ribs, in light of execution appraisals looking like its inside parts. Different segments, for example, the outside cases and the turning fan ribs set in an assortment of working conditions, for example, fluctuating impeller speed and number of edges, are assessed mathematically and tentatively. Assessment depends on execution boundaries, including the delta and outlet pressures, stream rate, force, and intensity of the radial fan. The mathematical examination recommends that the blend of the different pivoting outline strategy and the standard k-ε disturbance model was suitable for recreation of the inside stream qualities and for power forecast. The mathematical outcomes were contrasted and tests under deliberately planned trial conditions. Plan and displaying of Impeller and packaging has been completed in CATIA V5R21 and then the Calculation was imported to Ansys 16.0. By differing the quantity of fan ribs, the exhibition fluctuates practically nothing. Nonetheless, the FC fan ribs display the best exhibition in regards to their stream rate reaction and are related with most reduced force. The weight at the exit is diminished as the stream rate is expanded. Among all the fans, the FC fan would yield the most noteworthy stream rate.

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Efficient and reliable surge prevention algorithm for centrifugal compressor

Aircraft Engineering and Aerospace Technology ◽

10.1108/aeat-11-2018-0284 ◽

2020 ◽

Vol 92 (1) ◽

pp. 47-59

Author(s):

Grzegorz Liśkiewicz

Keyword(s):

Working Conditions ◽

High Frequency ◽

Experimental Studies ◽

Phase Portraits ◽

Centrifugal Blower ◽

Local Flow ◽

Content Type ◽

Operating Range ◽

Surge Margin ◽

External Conditions

Purpose The paper aims to present an outline of the technology of the active anti-surge algorithm based on high-frequency pressure measurement. The presented system is fast, inexpensive and reliable and does not limit the machine-operating range. Many contemporary anti-surge systems are based on theoretical surge margin. This solution limits machine operating range by about 10-15 per cent in the region of the highest pressure ratios. It is also often sensitive to change in external conditions such as temperature or density, as the system reacts to limits calculated theoretically. Design/methodology/approach This paper presents results of pressure measurements obtained on the low-speed centrifugal blower DP1.12. The pressure signals were presented in the form of phase diagrams, and conclusions were drawn from their phase portraits to develop the surge indication parameter. Findings The presented safety system uses the signal to develop the so-called (rate of derivative fluctuation) RDF parameter. In nominal working conditions, this parameter keeps the value close to 1. When RDF reaches values over 3, the anti-surge procedure should be implemented. Experimental studies have shown that this algorithm assures enough time to incur actions suppressing unstable phenomena. Originality/value The system reacts to real machine working conditions and is hence reliable. The RDF algorithm could also be used to identify local flow instabilities, as well as off-design operation.

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Dynamical system analysis of unstable flow phenomena in centrifugal blower

Open Engineering ◽

10.1515/eng-2015-0036 ◽

2015 ◽

Vol 5 (1) ◽

Author(s):

David Garcia ◽

Matthew Stickland ◽

Grzegorz Liśkiewicz

Keyword(s):

Dynamical System ◽

Working Conditions ◽

System Analysis ◽

Singular Spectrum Analysis ◽

Statistical Correlation ◽

Control Points ◽

Original Signal ◽

Centrifugal Blower ◽

Unstable Flow ◽

Flow Phenomena

AbstractMethods of dynamical system analysis were employed to analyze unsteady phenomena in a centrifugal blower. Pressure signals gathered at different control points were decomposed into their Principal Components (PCs) by means of Singular Spectrum Analysis (SSA). Certain number of PCs was considered in the analysis based on their statistical correlation. Projection of the original signal onto its PCs allowed to draw the phase trajectory that clearly separated non-stable blower working conditions from its regular operation.

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