The direct jumping of molecules through the compression of gas centrifuge / Tokmantsev V. I.,Seleznev V. D. // VACUUM. - 2014. - V. 109, l. SI. - P. 349-353.

ISSN/EISSN:

0042-207X / нет данных

Type:

Article

Abstract:

A 3D numerical simulation of pressure distribution in the helicoid multi-groove Holweth pump as the compression of a gas centrifuge is carried out. It was shown that the combination of the free molecular regime and clearance between the compression rotor and stator leads to an appreciable effect of collisionless jumping, which essentially influences the pressure in a high vacuum chamber. When neglecting the jumping effect, the limit compression ratio is very large. The jumping considerably reduces the compression ratio to approximately the same moderate value for different gases. As a result of the simulation, the limit compression ratio can be obtained as an optimizable function of variable parameters such as the groove depth, width and angle of inclination. The numerical results can be interpreted within the framework of a simple phenomenological model. (C) 2014 Elsevier Ltd. All rights reserved.

Author keywords:

Compression ratio; Rarefied gas; Centrifuge VACUUM PUMPS; HOLWECK PUMP; REGIMES; FLOWS; STAGE

DOI:

10.1016/j.vacuum.2014.06.005

Web of Science ID:

ISI:000342716000057

Соавторы в МНС:

Другие поля

Поле	Значение
Month	NOV
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
Keywords-Plus	VACUUM PUMPS; HOLWECK PUMP; REGIMES; FLOWS; STAGE
Research-Areas	Materials Science; Physics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Physics, Applied
Author-Email	tokmvi@ru66.ru SelVD@yandex.ru
Number-of-Cited-References	19
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	16
Journal-ISO	Vacuum
Doc-Delivery-Number	AQ3TI