Accession Number : AD0874154

Title :   Investigation of High-Pressure Hydraulic Vortex Rate Sensor.

Descriptive Note : Final rept.,

Corporate Author : SINGER CO LITTLE FALLS NJ KEARFOTT DIV

Personal Author(s) : DeSantis, Michael J. ; Rakowsky, Edward L.

Report Date : JUL 1970

Pagination or Media Count : 96

Abstract : The study was undertaken to establish the feasibility of a high-pressure (3000 psi) hydraulic vortex rate sensor for application in a helicopter hydraulic stability-augmentation system. The feasibility of low-pressure fluid stabilization systems was demonstrated. The primary component that requires development for implementation in a high pressure system is the vortex rate sensor. The high-pressure hydraulic vortex rate sensor has an on-board built-in supply of hydraulic fluid which is used in the primary hydro-mechanical flight control of the vehicle. A small amount of hydraulic fluid under high pressure can be diverted from the main system to the vortex rate sensor, used to perform a sensing function, and returned to the main hydrualic system. The fluid systems approach incorporating the high-pressure hydraulic vortex rate sensor offers improved reliability, maintainability, and reduced cost over conventional electromechanical systems. The experimental program is to evaluate the performance of a hydraulic vortex rate sensor over a wide range of operating temperatures and pressures. A variable-geometry capability was incorporated in the design and fabrication of the experimental model to evaluate the effects of the vortex chamber diameter, passage gap heights, and signal pick-off location on the signal output of the device. A limited theoretical trade-off analysis was performed to determine the functional relationships between the output signal and geometric and flow parameters. Based upon this analysis, three chamber diameters were fabricated. (Author)

Descriptors :   *HELICOPTERS), (*FLOWMETERS, VORTICES), (*STABILIZATION SYSTEMS, HYDRAULIC FLUIDS, PRESSURE, DETECTORS, FEASIBILITY STUDIES, HYDRAULIC EQUIPMENT.

Subject Categories : Helicopters
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE