| 摘要 |
A thin-film gauge for use in measuring distributed, convective heat transfer rates occurring along given surfaces, particularly surfaces of test specimens disposed in the air stream of a wind tunnel, characterized by the utilization of a thin-film substrate and a plurality of painted platinum leads extending across the surface of the substrate including a pair of leads adapted to deliver an electrical current at a constant amperage through a selected thermally active area and a pair of leads coupled therewith at opposite sides of the thermally active area for detecting heat induced voltage drops occurring in the thermally active area so that the active length of the gauge is defined between the voltage output leads, whereby changes in heat transferred to the thermally active area are isolated and determined by detecting induced changes in voltage drop occurring therein.
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