Accession Number : AD0614020

Title :   THERMOANEMOMETER WITH DC FEEDBACK,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Appolonov,G. F.

Report Date : 26 MAR 1965

Pagination or Media Count : 10

Abstract : A brief description is given of a thermoanemometer which measures the mean velocity of air flow (up to 120 m/sec) and velocity pulsation intensity up to 10,000 c,. Compensation of thermal inertia of the filament is realized with the aid of a feedback amplifier, which makes a corresponding current regulation of filament heating current and automatically maintains the resistance of this filament. The instrument has a special amplifier, rectifying the non-linear dependence of the signal upon the rate of flow coming from the filament. Measurement of mean square root values of velocity pulsation is made with the aid of a pulsation amplifier, vacuum thermocouple, and thermo EMF amplifier.

Descriptors :   (*FLOWMETERS, FLUID MECHANICS), GAS FLOW, VELOCITY, THERMOCOUPLES, ELECTRON TUBE HEATERS, DIRECT CURRENT, USSR, FEEDBACK AMPLIFIERS

Distribution Statement : APPROVED FOR PUBLIC RELEASE