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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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By building a floating isolator box of cork around the test object and using a low frequency transducer, automated conventional C scan equipment is adapted to inspect the object ultrasonically. Vibrations are isolated and reflected noise is reduced.
Ultrasonic pulse method /1 to 3 MHz/ measures both sound speed and absorption in monatomic and polyatomic gases in a temperature range of 300 to 20000 degrees K at atmospheric pressure. Helium, nitrogen, oxygen, and argon are investigated.
Reliable and accurate Delta technique, a nondestructive ultrasonics method, uses redirection of energy to detect randomly oriented imperfections in fusion butt welds. Data on flaws can be read from either an oscilloscope or a printout.
Ultrasonic absorption analysis of single relaxation and time constants of tertiary butyl alcohol in cyclohexane
Experimental and clinical treatment of Meniere's disease using ultrasonic radiation
Ultrasonic measurement of core material temperature in nuclear rocket engines
Ultrasonic scanning system developed for in place inspection of brazed tube joints
Ultrasonic echography for ventricular size determination, calculating stroke volume and valvular regurgitation severity
Ultrasonic wave propagation guided by fluid layer between two elastic solids, plotting normalized velocities and layer thicknesses
Isotropic finite strain expressions for compressional and shear velocities, noting no discrepency with ultrasonic and seismic data
Erythrocyte suspension subjected to gas bubble ultrasonic oscillation, investigating hemolysis mechanism
Ultrasonic velocity in human bones measured for calcium content and density
System detects defects of .051 cm in diameter and larger. System incorporates scanning head assembly including boot enclosed transducer, slip ring assembly, drive mechanism, and servotransmitter. Ultrasonic flaw detector, prototype recorder, and special recorder complete system.
Manual and semiautomatic ultrasonic torque wrenches for tightening flared tubing connections
Ultrasonic attenuation and velocity measurements in normal and superconducting states of niobium
Fatigue in 1-mil diameter thermocompression and ultrasonic bonding of aluminum wire
Ultrasonic absorption in hydrogen sulfide, measuring vibrational and rotational relaxation times as function of temperature
Fused silica and single crystal NaCl nonlinear parameters from ultrasonic beams mixing studies