Comparison of Liquid Water Content Measurement Technquies in an Icing Wind Tunnel
Comparison of Liquid Water Content Measurement Technquies in an Icing Wind Tunnel

Author:

Publisher:

Published: 1999

Total Pages: 0

ISBN-13:

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This paper compares the results of liquid water content measurements by various means in an icing wind tunnel. The techniques/instruments tested are the icing blade, a single rotating cylinder, the Johnson-Williams and CSIRO-King hot-wire probes, the Nevzorov LWC/TWC probe and the liquid water content calculated from the combined droplet distributions of two droplet sizing probes - the Forward Scattering Spectrometer probe and the Optical Array probe. A large range of icing conditions was used for this study. The liquid water content ranged from 0.1 to 1.25 g/cu m and the median volumetric droplet diameters (MVD) ranged from 10 to 270 micrometers. Airspeeds of 50 to 250 mph (22 to 112 m/s) were used. This study shows the degree of agreement between the various liquid water content measurement methods over the normal cloud MVD range of 10 to 50 micrometers and over several supercooled large droplet (SLD) conditions. It shows that the Nevzorov LWC/TWC instrument has the potential for measuring the LWC in SLD clouds as well as normal droplet size cloud conditions. It reveals a large disagreement between the droplet sizing probe results and the other methods. The implications and possible causes of this disagreement are discussed. Recommendations for additional investigations to resolve disagreements are included.

Wind Turbine Icing Physics and Anti-/De-Icing Technology
Wind Turbine Icing Physics and Anti-/De-Icing Technology

Author: Hui Hu

Publisher: Academic Press

Published: 2022-08-30

Total Pages: 224

ISBN-13: 0323903258

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Wind Turbine Icing Physics and Anti-/De-Icing Technology gives a comprehensive update of research on the underlying physics pertinent to wind turbine icing and the development of various effective and robust anti-/de-icing technology for wind turbine icing mitigation. The book introduces the most recent research results derived from both laboratory studies and field experiments. Specifically, the research results based on field measurement campaigns to quantify the characteristics of the ice structures accreted over the blades surfaces of utility-scale wind turbines by using a Supervisory Control and Data Acquisition (SCADA) system and an Unmanned-Aerial-Vehicle (UAV) equipped with a high-resolution digital camera are also introduced. In addition, comprehensive lab experimental studies are explored, along with a suite of advanced flow diagnostic techniques, a detailed overview of the improvements, and the advantages and disadvantages of state-of-the-art ice mitigation strategies. This new addition to the Wind Energy Engineering series will be useful to all researchers and industry professionals who address icing issues through testing, research and industrial innovation. - Covers detailed improvements and the advantages/disadvantages of state-of-the-art ice mitigation strategies - Includes condition monitoring contents for lab-scale experiments and field tests - Presents the potential of various bio-inspired icephobic coatings of wind turbine blades