Engineering topics

Hovenac, Edward A.

Publications and source records attributed to Hovenac, Edward A..

21 records · Page 2

NASA NTRS1988

Performance of the forward scattering spectrometer probe in NASA's icing research tunnel

Two Forward Scattering Spectrometer Probes were used to measure droplet distributions in the NASA Lewis Icing Research Tunnel. The instruments showed good agreement when the median volume diameter (MVD) was approximately 16 micrometers. Coincidence events affect much of the data and caused the measured MVD to be about 2 to 3 micrometers larger than expected. Coincidence events were reduced by shutting down half of the spray bars in the tunnel during certain tests.

Hovenac, Edward A.↗

NASA NTRS1987

Operating envelopes of particle sizing instrumentation used for icing research

The Forward Scattering Spectrometer Probe and the Optical Array Probe are analyzed in terms of their ability to make accurate determinations of water droplet size distributions. Sources of counting and sizing errors are explained. The paper describes ways of identifying these errors and how they can affect measurement.

Hovenac, Edward A.↗

NASA NTRS1987

Performance and operating envelope of imaging and scattering particle sizing instruments

Scattering and imaging type particle sizing instruments are analyzed in terms of their ability to make accurate determinations of particle size distributions, number density, and total mass. Sources of counting and sizing errors are explained. Ways are described of identifying these errors and how these errors can effect the measurements.

Hovenac, Edward A.↗