Accession Number : ADD017489

Title :   Fluid Dynamometer Having Fluid Characteristic Power Absorption Adjustment Capability.

Descriptive Note : Patent, Filed 29 Mar 93, patented 14 Mar 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Quartarone, James R

Report Date : 14 Mar 1995

Pagination or Media Count : 8

Abstract : A fluid dynamometer is provided for absorbing a range of power output produced by an engine's rotating shaft. Power absorbing characteristics are controlled by adjusting the fluid media characteristics in terms of its temperature and/or its density and viscosity. A tank, containing an energy or power absorbing fluid, receives the rotating shaft. One or more disks, submerged in the fluid and coaxially mounted on the rotating shaft for rotation therewith, cooperate with the fluid to absorb power from the rotating shaft. The disk(s) are sized so that a first specified amount of power from the rotating shaft is absorbed at a calibration temperature of the fluid. Heating and cooling units are provided to respectively heat and cool the fluid. A controller energizes the heating and cooling units in a cooperative fashion to adjust and maintain the fluid at a predetermined temperature value for power absorption at a second specified amount of power produced by the rotating shaft. A fluid composition exchanger may also be provided to alter the power absorbing charactetistics by altering the fluid's composition. (AN)

Descriptors :   *DYNAMOMETERS, *PATENTS, *POWER MEASUREMENT, KINEMATICS, SETTING(ADJUSTING), DENSITY, TEMPERATURE, COOLING, FRESH WATER, ENGINES, SHAFTS(MACHINE ELEMENTS), CALIBRATION, DISKS, ABSORPTION, ROTATION, VISCOSITY, FLUID FLOW, POWER METERS, GLYCOLS, WATER TANKS, SALT WATER

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE