Theory Versus Experiment for the Rotordynamic Coefficients of Annular Gas Seals: Part 2—Constant-Clearance and Convergent-Tapered Geometry | Zendy

C. C. Nelson | Zendy; D. W. Childs | Zendy; C. Nicks | Zendy; D. Elrod | Zendy

Open Access

Theory Versus Experiment for the Rotordynamic Coefficients of Annular Gas Seals: Part 2—Constant-Clearance and Convergent-Tapered Geometry

Author(s) -

C. C. Nelson,

D. W. Childs,

C. Nicks,

D. Elrod

Publication year - 1986

Publication title -

journal of tribology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.498

H-Index - 84

eISSN - 1528-8897

pISSN - 0742-4787

DOI - 10.1115/1.3261228

Subject(s) - stiffness , constant (computer programming) , mechanics , geometry , leakage (economics) , mathematics , mathematical analysis , physics , thermodynamics , computer science , macroeconomics , economics , programming language

The leakage and rotordynamic coefficients of constant-clearance and convergent-tapered annular gas seals were measured in an experimental test facility. The results are presented along with the theoretically predicted values. Of particular interest is the prediction that optimally tapered seals have significantly larger direct stiffness than straight seals. The experimental results verify this prediction. Generally the theory does quite well, but fails to predict the large increase in direct stiffness when the fluid is pre-rotated.

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