Naturally aspirating isokinetic total water content probe: Wind tunnel test results and design modifications

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Proceedings titleSAE Technical Papers
ConferenceSAE 2011 International Conference on Aircraft and Engine Icing and Ground Deicing, 13 June 2011 through 17 June 2011, Chicago, IL
SubjectCollection efficiency; Design modifications; Flight testing; Ground based; Ice crystals; Liquid water content; NASA Glenn; Power supply unit; Stokes number; Supercooled liquids; Total water content; Wind tunnel tests; Aircraft; Inlet flow; Liquids; NASA; Probes
AbstractA total water content probe for flight and ground based testing is being completed. During operation across a range of altitudes and water content conditions, the probe has to maintain isokinetic flow, vaporize the solid and liquid water content and maintain the inlet ice free to ensure isokinetic flow. Despite achieving isokinetic operation, the collection efficiency of particles less than 30 μm can be less than 100%. A correlation of collection efficiency to Stokes number has been determined to correct the results for this effect. In preparation for flight testing an integrated data acquisition, control and power supply unit was developed and successfully tested. Results from testing at the NASA Glenn Icing Research Tunnel are presented covering both ice crystals and super cooled liquid conditions. The results correspond well to previously published work and problems encountered during previous testing of this probe are shown to have been resolved.
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AffiliationNational Research Council Canada (NRC-CNRC); Aerospace (AERO-AERO)
Peer reviewedYes
NPARC number21271259
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Record identifier11c712ee-d863-4e80-a6f5-1a7adbacaa21
Record created2014-03-24
Record modified2016-05-09
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