Accession Number : AD0732211

Title :   Comparisons of Experimental and Theoretical Dynamic Rotor-Bearing Behavior Using Gas Lubrication.

Descriptive Note : Technical rept. Dec 68-May 70,

Corporate Author : MIDWEST RESEARCH INST KANSAS CITY MO

Personal Author(s) : Dayton,Ronald D.

Report Date : NOV 1971

Pagination or Media Count : 54

Abstract : The report presents the results of an investigation into the adequacy of presently available theory in predicting the dynamic behavior of a rotor supported in hydrostatic and hydrodynamic gas lubricated journal bearings. Measurements of critical speeds, threshold of instability speeds, gas flow rates, and rotor whirl frequencies for several rotors supported in hydrostatic and hydrodynamic journal bearings were made and compared to theoretical predictions. Variables investigated were bearing load, bearing supply pressure, bearing and gas temperature, and type of bearing supply gas. Good agreement between the experimental and theoretical results was obtained. (Author)

Descriptors :   (*JOURNAL BEARINGS, *LUBRICATION), (*HELICOPTER ROTORS, JOURNAL BEARINGS), HYDROSTATIC PRESSURE, GAS FLOW, VELOCITY, EXPERIMENTAL DATA, THEORY

Subject Categories : Helicopters
      Lubricants and Hydraulic Fluids
      Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE