Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/2850
Full metadata record
DC FieldValueLanguage
dc.contributor.authorPradhan, Biren Kumar-
dc.contributor.authorBehera, Suraj K-
dc.date.accessioned2018-01-04T10:37:08Z-
dc.date.available2018-01-04T10:37:08Z-
dc.date.issued2017-12-
dc.identifier.citation9th International Conference on Industrial Tribology (ICIT-2017), Kolkata, India, 6 - 9 December, 2017,en_US
dc.identifier.urihttp://hdl.handle.net/2080/2850-
dc.descriptionCopyright of this document belongs to proceedings publisher.en_US
dc.description.abstractA turboexpander is also referred as rotatory expansion device used in various cryogenic processes such as air separation, cryogenic liquification, etc. The operational objective of a turboexpander is to refrigerate a gas stream, by expanding the gas at the nearly isentropic condition and removal of work from the gas. The high efficiency of cryogenic liquification process is possible at high-speed of the turboexpander. High-speed brings constraints on the selection of bearing. So to meet above requirements gas bearings are found to be suitable for such application. The gases of gas bearings unlike liquid lubricants have an inherently low viscosity, which leads to lower stiffness and damping. Low stiffness and damping are prone to instability at high rotational speed. The gas foil bearings with compliant structure can tailor stiffness and damping. Also, the compliant surface can accommodate the thermal and centrifugal growth of the rotor. In the current research work, a modest attempt has been made to study the feasibility of gas foil bearing for helium turboexpander rotating a 2,55,000 rpm. The feasibility study includes (i) thumb rule for load carrying capacity, stiffness and damping coefficient (ii) aerodynamic analysis of gas foil journal bearings, by solving compressible Reynolds equation and structural equation using Finite Difference Method and (iii) rotordynamic analysis of the vertical rotor. The author believes the detailed steps of the feasibility study will help the researchers around the world to design gas foil bearings for other high-speed turbomachinery.en_US
dc.subjectGas foil journal bearingsen_US
dc.subjectTurboexpanderen_US
dc.subjectFinite Difference Methoden_US
dc.titleFeasibility Studies on Gas Foil Journal Bearings in Helium Turboexpanderen_US
dc.typeArticleen_US
Appears in Collections:Conference Papers

Files in This Item:
File Description SizeFormat 
2017_ICIT_BKPradhan_Feasibility.pdfConference Paper240.96 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.