RESEARCH PAPERS: Additional Technical Papers

Optimum Step Design for Centering of Pistons Moving in an Incompressible Fluid

[+] Author and Article Information
Izhak Etsion

Technion Israel Institute of Technology, Haifa, Israel

B. J. Hamrock

National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio

J. Fluids Eng 99(4), 675-680 (Dec 01, 1977) (6 pages) doi:10.1115/1.3448882 History: Received March 23, 1977; Online October 12, 2010


Hydrodynamic effects are analyzed for a stepped piston moving within a tight clearance tube filled with an incompressible fluid. Together with the hydrostatic effects that were analyzed in an earlier paper, a complete solution is obtained and an optimum step design for centering of the piston is suggested. The axial speed resulting from an axial driving force is calculated, and some experimental results for pistons falling in a water filled tube are presented.

Copyright © 1977 by ASME
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