Optimization of turbomachinery harmonics

Details Optimization of turbomachinery harmonics Optimization of turbomachinery harmonics

1995-11-14

1998-01-20

Look, Edward K.

Rotary kinetic fluid motors or pumps

With sound or vibratory wave absorbing or preventing means...

60725, 181210, 181214, 181224, F01D 2504

Patent

active

057095299

ABSTRACT:
A turbomachine assembly includes a number of circumferentially spaced rotor blades, a number V of circumferentially spaced guide vanes axially adjacent to the rotor blades, an annular chamber surrounding the rotor blades, and an intake and exhaust for receiving and discharging air that passes through the annular chamber. When the turbomachine is in operation, spinning mode tones are generated by the interaction of the rotor and guide vanes. These tones are minimized by selecting a number of vanes relative to the number of blades so that selected tones propagate axial to the intake and exhaust of the turbomachine. A sound absorptive material is then positioned so that the tones impinge upon it. Moreover, a tuned duct is positioned in the path of the remaining tones. The turning vanes, placed within the tuned duct, cancel the remaining tones travelling through the duct.

REFERENCES:
patent: 3107046 (1963-10-01), Frankel et al.
patent: 3194487 (1965-07-01), Tyler et al.
patent: 3739872 (1973-06-01), McNair
patent: 3819008 (1974-06-01), Evans et al.
patent: 3890060 (1975-06-01), Lipstein
patent: 5169288 (1992-12-01), Gliebe et al.

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