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RISDiscussion: “The Effects of Fixed Rotor Tilt on the Rotordynamic Coefficients of Incompressible Flow Annular Seals” (Scharrer, J. K., Rubin, N., and Nelson, C. C., 1993, ASME J. Tribol., 115, pp. 336–340)
Publisher: The American Society of Mechanical Engineers (ASME)
Annular Honeycomb Seals: Test Results for Leakage and Rotordynamic Coefficients; Comparisons to Labyrinth and Smooth Configurations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Test results are presented for leakage and rotordynamic coefficients for seven honeycomb seals. All seals have the same radius, length, and clearance; however, the cell depths and diameters are ...
An Entrance Region Friction Factor Model Applied to Annular Seal Analysis: Theory Versus Experiment for Smooth and Honeycomb Seals
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A friction factor model is developed for the entrance-region of a duct. The model is used in an annular gas seal analysis similar to Nelson’s (1984). Predictions of the analysis are compared ...
Solar Array Performance as a Function of Orbital Parameters and Spacecraft Attitude
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The dependence of solar array energy on orbital parameters is given for cases that achieve optimum array pointing, and therefore, maximum performance. Optimum pointing requires continual array ...
Theory Versus Experiment for the Rotordynamic Coefficients of Annular Gas Seals: Part 2—Constant-Clearance and Convergent-Tapered Geometry
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An experimental test facility is used to measure the leakage and rotordynamic coefficients of constant-clearance and convergent-tapered annular gas seals. The results are presented along with the ...
A New Friction Factor Model and Entrance Loss Coefficient for Honeycomb Annular Gas Seals
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A new experimental friction factor model for a honeycomb surface was developed using a static seal tester. Three clearances and three lengths were tested for the seals, and Reynolds number ...
Theory Versus Experiment for the Rotordynamic Coefficients of Annular Gas Seals: Part 1—Test Facility and Apparatus
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A facility and apparatus are described for determining the rotordynamic coefficients and leakage characteristics of annular gas seals. The apparatus has a current top speed of 8000 cpm with a ...