Additional Studies of the Effects of Airplane Flowfields on Hydrometeor Concentration Measurements.
Abstract
Hydrometeor concentrations seen by fuselage-mounted particle sampling instruments are distorted owing to flow around the airplane. A general, three-dimensional method is used to compute concentration distortion and sampling efficiency. Evidence to support the use of steady-state drag coefficients for accelerative particle motion is discussed. Assessments of sampling adequacies of several instruments mounted on a Learjet 36 airplane are reported. This includes a total water content indicator mounted inside the nose of the Learjet, assessment of which requires calculation of air and particle flow into the instrument orifice - a new application of the method. Finally a preliminary, generalized method is developed for estimation of safe sampling distances for fuselage-mounted instruments and results are compared with those of case studies. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 13, 1976
- Accession Number
- ADA032311
Entities
People
- Hillyer G. Norment