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Effects of modified effective length models of the rupture zone on the analysis of a fluid journal bearing

Publication ,  Journal Article
Knight, JD; Ghadimi, P
Published in: Tribology Transactions
January 1, 1992

Two versions of a model for the thermal behavior of the lubricant film in the cavitation region of a journal bearing are presented and incorporated into a solution algorithm for the operating characteristics of an axially grooved bearing. The model is based on an approximation of the flow as two parts: Couette-like streamers plus uniform velocity portions adhered to the journal. One version (CH) results from assuming a constant ratio between the cavity height and the local gap height. The other (FH), results from assuming a constant thickness of the adhered fluid layer. An approximate energy equation is derived for the rupture zone and applied to the calculation of the bearing wall temperature. Parametric studies of the effects of the choice of cavity dimensions indicate that for appropriate choices the agreement between theory and published experiment is significantly better for the new methods. Agreement is lightly better for the FH model that for the CH model, and because of physical arguments the FH model is preferred. Results for the cases examined are consistent with an adhered layer having a thickness approximately 40 percent of the gap height at the rupture boundary. © 1992 Taylor & Francis Group, LLC.

Duke Scholars

Published In

Tribology Transactions

DOI

EISSN

1547-397X

ISSN

1040-2004

Publication Date

January 1, 1992

Volume

35

Issue

1

Start / End Page

29 / 36

Related Subject Headings

  • Mechanical Engineering & Transports
  • 4017 Mechanical engineering
  • 0913 Mechanical Engineering
 

Citation

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ICMJE
MLA
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Knight, J. D., & Ghadimi, P. (1992). Effects of modified effective length models of the rupture zone on the analysis of a fluid journal bearing. Tribology Transactions, 35(1), 29–36. https://doi.org/10.1080/10402009208982085
Knight, J. D., and P. Ghadimi. “Effects of modified effective length models of the rupture zone on the analysis of a fluid journal bearing.” Tribology Transactions 35, no. 1 (January 1, 1992): 29–36. https://doi.org/10.1080/10402009208982085.
Knight JD, Ghadimi P. Effects of modified effective length models of the rupture zone on the analysis of a fluid journal bearing. Tribology Transactions. 1992 Jan 1;35(1):29–36.
Knight, J. D., and P. Ghadimi. “Effects of modified effective length models of the rupture zone on the analysis of a fluid journal bearing.” Tribology Transactions, vol. 35, no. 1, Jan. 1992, pp. 29–36. Scopus, doi:10.1080/10402009208982085.
Knight JD, Ghadimi P. Effects of modified effective length models of the rupture zone on the analysis of a fluid journal bearing. Tribology Transactions. 1992 Jan 1;35(1):29–36.

Published In

Tribology Transactions

DOI

EISSN

1547-397X

ISSN

1040-2004

Publication Date

January 1, 1992

Volume

35

Issue

1

Start / End Page

29 / 36

Related Subject Headings

  • Mechanical Engineering & Transports
  • 4017 Mechanical engineering
  • 0913 Mechanical Engineering