Language selection

Government of Canada / Gouvernement du Canada

Search

Liquid water content instrumentation study at the NRC AIWT

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.4271/2023-01-1424
AuthorSearch for: 1; Search for: 1ORCID identifier: https://orcid.org/0009-0002-6145-6039
Affiliation
  1. National Research Council of Canada. Aerospace
FormatText, Article
ConferenceInternational Conference on Icing of Aircraft, Engines, and Structures, June 20-22, 2023, Vienna, Austria
Abstract
The National Research Council Altitude Icing Wind Tunnel liquid water content calibrations have historically relied on a 2.4 mm diameter rotating cylinder for drop sizes up to 50 μm and a 6.2 mm diameter rotating cylinder for drop sizes from 50 μm to 200 μm. This study compares the facility calibration, derived from rotating cylinder measurements, to water content measurements from the Science Engineering Associates Multi-Element Probe and the National Research Council Compact Iso-Kinetic Probe over a range of airspeeds and drop sizes. The data show where the rotating cylinder measurements may start to underestimate the liquid water content (LWC), possibly due to splashing at higher airspeeds and drop sizes. The data also show that the LWC read by the Multi-Element Probe is higher than that provided by the rotating cylinders, and the Compact Iso-Kinetic Probe (CIKP) reads higher than both other methods. These trends are consistent with instrumentation comparison data from other icing wind tunnels. The study examines the effects of aerodynamic blockage on the probe measurements and the effects of placing the CIKP reference humidity sensor at different positions relative to the icing cloud. Overall, the data do not support changing the AIWT LWC calibration method from the rotating cylinder at this time.
Publication date
PublisherSAE International
In
  • SAE International Journal of Advances and Current Practices in Mobility 6, no. 3, 2023-01-1424 (20 June 2023).
Series
  • SAE Technical Paper Series.
LanguageEnglish
Peer reviewedYes
Export citationExport as RIS
Report a correctionReport a correction (opens in a new tab)
Record identifierc343226c-8624-4ef5-bc04-1c76570bac03
Record created2024-09-06
Record modified2024-09-06
Date modified: