Research Study and Experimental Program to Determine the Transport Properties of High Temperature and High Density Gases
Interim rept. Sep 1968-Sep 1970
PANAMETRICS INC WALTHAM MA
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Transport property measurements with ultrasonic techniques are discussed over the entire temperature 100-15,000 degrees and pressure 1-1000 atm ranges. A chart of various techniques for the determination of transport properties in the various temperature and pressure ranges is given. Sound absorption and sound speed determinations were used to obtain thermophysical properties of argon, helium, nitrogen and air at room temperature and pressures between 1-500 atm. Several variations of pulsed ultrasonic techniques were used to obtain maximum precision in the gas property measurements. Sound speeds accurate to approximately 0.1 were obtained in all the gases. Thermal conductivity and specific heat ratios were deduced for air. A cavity technique was developed for high accuracy 0.1 viscosity, thermal conductivity and bulk viscosity determinations. Initial tests were run to proof the technique at room temperature and pressure. Sound speed, Prandtl number and viscosity measurements were made which agree with accepted values to within 1.
- Fluid Mechanics