Mechanical Heat Flux Recorder.
DEPARTMENT OF THE NAVY WASHINGTON D C
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The patent describes a mechanical heat flux recorder which is based upon the shape recovery properties of a nickel-titanium alloy NiTi. A pair of nickel-titanium strips are connected between a heat sink block enclosed in an asbestos lined metal box and respective exposed heat receivers. The heat receivers have calibration marks scribed around the edges and reference marks are provided on the box. The heat receivers are first turned not more than one revolution clockwise, for example, and set at an initial position indicating zero. This twisting operation plastically deforms the nickel-titanium metal strips. When the instrument is then exposed to a heat environment which is being investigated, the strips partially recover their original straight shape, and the dial readings after exposure are noted in conjunction with a prepared chart to find the heat flux in calories per centimeter squared per second or some other preferred units of measure.
- Test Facilities, Equipment and Methods