The helicoid multi-groove vacuum pump in both viscous and molecular states

 
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1994 (EN)
The helicoid multi-groove vacuum pump in both viscous and molecular states (EN)

Πάνος, Χρήστος Ν. (EL)
Αντωνίου, Αναστάσιος Γ. (EL)
Βαλαμόντες, Σπύρος Ε. (EL)

N/A (EN)

In this paper, a helicoid multi-groove vacuum pump (drag pump) of indirect exhaust is studied from the theoretical point of view. The motion of gas is considered within a tube of orthogonal cross-section. The pumping action is caused by moving the opposite sides with different speeds in the x-direction. At the beginning, a new term, the separation pressure between viscous and molecular states, is defined and then the theory of Gaede for the helicoid single-groove drag pump for the molecular state is extended to the helicoid multi-groove drag pump, for both viscous and molecular states. Finally, the pump characteristics are studied as a function of the helicoid step and the optimum angle for pump design is given. (EN)

journalArticle

Viscosity (EN)
Speed (EN)
Αριθμητικές μέθοδοι (EN)
Pipe flow (EN)
Numerical methods (EN)
Ταχύτητα (EN)
Πίεση (EN)
Electron tubes (EN)
Equations of motion (EN)
Pressure (EN)
Ηλεκτρονικοί σωλήνες (EN)
Ροή σε σωλήνα (EN)
Εξισώσεις κίνησης (EN)
Ιξώδες (EN)

ΤΕΙ Αθήνας (EL)
Technological Educational Institute of Athens (EN)

Vacuum (EN)

English

1994-08

DOI: 10.1016/0042-207X(94)90121-X

Elsevier (EN)



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