Accession Number : AD0669083

Title :   LOW PRESSURE MEASUREMENTS IN A HYPERSONIC WIND TUNNEL.

Descriptive Note : Technical rept.,

Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS

Personal Author(s) : Kroeger,Frank B.

Report Date : JAN 1968

Pagination or Media Count : 36

Abstract : The experience of the past six years in the use of commercially available, variable-reluctance type pressure transducers is presented. The transducers are of the differential type with ranges of 2, 1, 0.5, 0.1, and 0.03 psid and used both at full range and 1/10 range for measuring pressures from 0.0005 to 2.0 psia. The transducers were used for single pressure measurements and combined with a selector valve for multiple pressure measurements, in both cases under various ambient conditions. Repeatability and hysteresis combined were within one per cent of full scale for 1/10 range calibrations. Response to a step function of pressure (from one model tap to the next) was the order of two minutes to a steady value when three feet of 0.047 ID tubing connected the model tap to the transducer. (Author)

Descriptors :   (*PRESSURE GAGES, PERFORMANCE(ENGINEERING)), (*HYPERSONIC WIND TUNNELS, TRANSDUCERS), LOW PRESSURE, MEASUREMENT, CALIBRATION, HYSTERESIS, RELIABILITY

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE