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TECHNICAL PAPERS

Compression Load Dynamics in a Special Helical Blower: A Modeling Improvement

[+] Author and Article Information
Giovanni Mimmi

Dipartimento di Meccanica Strutturale Università degli studi di Pavia Via Ferrata, 1 I-27100 Pavia, Italye-mail: mimmi@unipv.it

Paolo Pennacchi

Dipartimento di Meccanica Politecnico di Milano Via La Masa, 34 I-20158 Milano, Italye-mail: paolo.pennacchi@polimi.it

J. Mech. Des 123(3), 402-407 (Oct 01, 1999) (6 pages) doi:10.1115/1.1377016 History: Received October 01, 1999
Copyright © 2001 by ASME
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References

Figures

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Rotor lobe geometry on axial section
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Rotor surfaces in 3D representation
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Analytical definition of rotor surface and contact line determination
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2D region frontier, integration domain for the dynamic action estimation
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Reference scheme: blower (a) connected to a reservoir of finite volume (b). Parameters shown: ΔV: volume sent to the outlet by rotor rotation; VM(γ): outlet chamber volume; VS: reservoir finite volume.
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Fluid transportation (shaded region) from lower to higher pressure; this region is connected to the outlet when γ=γk
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Volume of the outlet chamber, closed between the rotors and the case
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Diagram of outlet pressure as function of rotation angle
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Range of rotor rotation angle during which the valve is closed, as function of the compression ratio
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Resultant components of forces as function of rotation angle
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Frequency analysis of force resultant components
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Resultant components of moments as function of rotation angle
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Frequency analysis of moment resultant components
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System isentropic efficiency as a function of compression ratio and outlet reservior volume

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