Microwave technique for liquid water detection in icing applications
Paper
Paper/Presentation Title | Microwave technique for liquid water detection in icing applications |
---|---|
Presentation Type | Paper |
Authors | Leis, John (Author), Buttsworth, David (Author), Saeed, Ramiz (Author), Saleh, Khalid (Author), McGilvray, Matthew (Author) and Gillespie, David (Author) |
Journal or Proceedings Title | SAE Technical Papers 2019-01-1930 |
Number of Pages | 8 |
Year | 2019 |
Place of Publication | United States |
Digital Object Identifier (DOI) | https://doi.org/10.4271/2019-01-1930 |
Web Address (URL) of Paper | https://www.sae.org/publications/technical-papers/content/2019-01-1930/ |
Conference/Event | 2019 International Conference on Icing of Aircraft, Engines, and Structures |
Event Details | 2019 International Conference on Icing of Aircraft, Engines, and Structures Event Date 17 to end of 21 Jun 2019 Event Location Minneapolis, United States |
Abstract | The partial melting of ingested ice crystals can lead to ice accretion in aircraft compressors, but accurately measuring the relatively small fraction of liquid water content in such flows is challenging. Probe-based methods for detecting liquid water content are not suitable for deployment within turbofan engines, and thus alternatives are sought. Recent research has described approaches based on passive microwave sensing. We present here an approach based on active microwave transmission and reflection, employing a vector network analyzer. Utilization of both transmission and reflection provides additional data over and above emission or transmission only, and permits a more controllable environment than passive sensing approaches. The paper specifically addresses the question of whether such an approach is viable within the context of representative icing wind tunnel and engine flow conditions. A quasi-thermal equilibrium approach is presented herein to estimate the melting ratio during microwave analysis of samples at 0 °C. Experimental results using microwaves in the 2.45GHz region are presented, and post-processing methods investigated. This is followed by an investigation of detection limits for ice accretion in the sub-gram range. The results indicate the potential of the technique, with a number of avenues evident for further research. |
Keywords | aircraft icing, microwave instrumentation |
ANZSRC Field of Research 2020 | 401201. Aerodynamics (excl. hypersonic aerodynamics) |
400907. Industrial electronics | |
400104. Avionics | |
400799. Control engineering, mechatronics and robotics not elsewhere classified | |
400103. Aircraft performance and flight control systems | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | School of Mechanical and Electrical Engineering |
University of Oxford, United Kingdom | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q548y/microwave-technique-for-liquid-water-detection-in-icing-applications
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