Aircraft flow effects on cloud droplet images and concentrations

Report (1984)

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Published Date

30-06-1984

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National Aeronautical Establishment, Aeronautical Note NAE-AN-21, NRC no 23508

Abstract

Cloud physics measurements by the Twin Otter aircraft are affected to some degree by local floweffects from the wing and from the probe canister. Droplet images and concentration are distorted in the worst case by no more than 20% for an aircraft lift coefficient (CL) of 0.75 and by only a few percent for low values of CL. Corrections for a particle Measuring Systems probe mounted on a short pylon at the inboard spanwise location have been given which are based on an experimentally verified model for the flow velocity.

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