Accession Number : AD0250302

Title :   VELOCITY OF SOUND MEASUREMENTS IN HIGH PRESSURE, HIGH TEMPERATURE STEAM

Corporate Author : NORTH CAROLINA STATE UNIV AT RALEIGH

Personal Author(s) : WOODBURN, JAMES

Report Date : NOV 1960

Pagination or Media Count : 1

Abstract : A VARIABLE PATH TYPE ACOUSTIC INTERFEROMETER WAS DESIGNED TO OPERATE AT COMBINED HIGH PRESSURE AND TEMPERATURES USING STEAM AS A MEDIUM. THE EXPERIMENTAL VALUES CONCERNED WITH THE VELOCITY OF SOUND IN STEAM ARE TO BE COMPARED WITH THE CALCULATED VALUES FROM THE TABLES OF KEENAN AND KEYES. THE INTERFEROMETER APPARATUS FOR THESE EXPERIMENTS WAS OF STAINLESS STEEL, G IN. IN DIAM., WITH HIGH PRESSURE, HIGH TEMPERATURE STEAM CONNECTIONS AT THE LOWER SIDE. TWO ELECTRODES MOUNTED IN THE INTERFEROMETER CAP WERE CONNECTED WITH A THERMOCOUPLE AND ONE WITH A CRYSTAL SOUND SOURCE. THE EXPERIMENTAL PROCEDURE WAS TO START AT 1000 PSIG AND 750 F, AND DECREASE THE BOILER PRESSURE TO 800, 600, 400 AND 200 PSIG, LEAVING THE SUPERHEATER CONTROLS ALONE. WITH 5 COMPLETE RUNS, VELOCITY OF SOUND MEASUREMENTS WERE MADE AT 5 DIFFERENT TEMPERATURES WITH THE RESPECTIVE PRESSURES BETWEEN 1000 TO 200 PSIG. THE SOUND REACTION PEAKS WERE QUITE DISTINCT OVER THE ENTIRE RANGE OF EXPERIMENTS ; 25 PEAKS WERE EASILY DETECTED. FURTHER STUDIES CONCERNING ABSORPTION AND DISPERSION ARE PLANNED AS WELL AS SOUND VELOCITY MEASUREMENTS UP TO 2000 PSIG AND 750 DEGREES F

Descriptors :   *INTERFEROMETERS, *SOUND, *STEAM, ACOUSTICS, GASES, HIGH PRESSURE, HIGH TEMPERATURE, LABORATORY EQUIPMENT, PRESSURE.

Distribution Statement : APPROVED FOR PUBLIC RELEASE