7 research outputs found
Recovery and Time-response Characteristics of Six Thermocouple Probes in Subsonic and Supersonic Flow
Experimental data obtained from three shielded and three unshielded thermocouple probes are presented. Data taken in air at room temperature over the ranges 0.2 to 2.2 Mach number and 0.2 to 2.2 atmospheres total pressure show reproducible systematic variations of recovery with Mach number, ambient pressure, flow angle, and probe design. Time-constant data determined at Mach 0.2 and room temperature and pressure indicate that unshielded probes are several times faster in response to temperature changes than shielded probes
Radiation and Recovery Corrections and Time Constants of Several Chromel-alumel Thermocouple Probes in High-temperature, High-velocity Gas Streams
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NACA Technical Notes
Experimental data obtained from three shielded and three unshielded thermocouple probes are presented. Data taken in air at room temperature over the ranges 0.2 to 2.2 Mach number and 0.2 to 2.2 atmospheres total pressure show reproducible systematic variations of recovery with Mach number, ambient pressure, flow angle, and probe design. Time-constant data determined at Mach 0.2 and room temperature and pressure indicate that unshielded probes are several times faster in response to temperature changes than shielded probes
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NACA Technical Notes
Report presenting an extension to another report, which used hot-wire-anemometer measurements of the intensity, scale, and spectra of turbulence in a 3.5-inch-diameter free subsonic jet for downstream distances from 8 to 20 jet diameters
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NACA Technical Notes
Report presenting an experimental determination of radiation and recovery corrections and time constraints for several designs of shielded and unshielded thermocouple probes using chromel-alumel wire. Radiation and time constant data were obtained for Mach numbers from 0.3 to 0.9 and a range of static pressures and temperatures. Tables and graphs are presented which show the correction factors of the various designs to aid in selecting a probe for a particular application