| 摘要 |
To determine the size of airborne water droplets having a diameter from approximately 1 to 100 mu m, if such water droplets move at a velocity of 50 to 150 m/s relative to a measuring probe and strike it, in the probe body, whose front face toward the flow has a vapor-deposited platinum film, approximately 0.5 mu m thick, whose temperature is kept constant at above 100 DEG C. by means of a bridge circuit; an analog voltage output signal of the bridge circuit is digitized and then further processed, with the aid of an evaluation computer program, among others, and with the aid of a formula (in accordance with equation (6)) derived from an energy balance for a droplet striking a platinum film, determines the droplet diameter from analyzed identifying variables of a droplet signal and from other known parameters.
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