Electrogasdynamic Spectral Anemometer,
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
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The electrogasdynamic EGD anemometer consists of an injector of unipolar charged particles fed into the flow to be probed, an equilibration region, and a collector for the charges. The particles are many times heavier than the molecules in the gas and they interact with the flow through drag forces. If these particles are tightly coupled to the flow, then the collecting probe receives information in electrical form about the fluid velocity. Besides being a direct velocity measurement, the probe can be of streamlined shape and very rugged, and it is insensitive to temperature differences in the flow. The charged particles can be chosen so as to give the desired range of frequency response. The instrument is sensitive to impurities in the flow but in principle the effect may be calibrated out.
- Test Facilities, Equipment and Methods