..., 7.5, 8.8, and 10 krpm), as well as nonrotating rotor case under zero preswirl condition. The rotordynamic coefficients for all the test conditions are obtained by pseudo-random excitation of the seal at multiple subsynchronous frequencies. By considering the transition Reynolds number (1000 < Re...

... flow rate by about 40% but barely changes the test seal's rotordynamic coefficients, i.e., the increased tooth clearance would not change the pump vibration performance. e-mail:  hitzhangmin@gmail.com e-mail:  dchilds@tamu.edu 08 07 2021 09 07 2021 27 09 2021 labyrinth...

... ˙ and other rotordynamic coefficients ( k , C , c , m q , and C eff ) remains unchanged. Here are more details: K decreases as inlet GVF increases from 6% to 10% (under partially turbulent flow conditions), while K increases with increasing inlet GVF from zero to 4% (in transitional regime...

... dynamic stiffness, the bulk-flow model of San Andrés (2012, “Rotordynamic Force Coefficients of Bubbly Mixture Annular Pressure Seals,” ASME J. Eng. Gas Turbines Power, 134(2), p. 022503) predicts decently the tendencies and magnitudes of the rotordynamic coefficients. Equation (25) defines...

... on the performance (leakage and rotordynamic coefficients) of a see-through labyrinth seal under mainly gas conditions. This paper continues Zhang and Childs (2019) (Zhang, M., and Childs, D., 2019, “A Study on the Leakage and Rotordynamic Performance of a Long Labyrinth Seal Under Mainly-Air Conditions,” ASME J...

... leakage and therefore increase the machine efficiency. However, reducing C r can also introduce undesired effects on the machine's vibration behaviors. This paper experimentally studies the impact of reducing C r on the leakage and rotordynamic coefficients of a 16-tooth see-through labyrinth seal under...

...–331) is used to calculate the rotordynamic coefficients developed by the labyrinth seals in the compressor stage and also provides a boundary condition for the shroud calculations. Comparisons between the measured shroud moment coefficients by Yoshida et al. (1996, Proceedings of the 6th International...

... aerodynamics compressors design engineering impellers machine bearings machinery production industries magnetic bearings mechanical stability rotors seals (stoppers) rotordynamic coefficients rotor stability impeller-shroud forces magnetic-bearing exciter The “Kaybob” compressor...