Design Criteria of a Thermal Mass Flow Sensor for Aircraft Air Data Applications

L. C. Ribeiro, M. L. Oliveira, R. A. Souza, S. P. L. Vieira, W. O. Avelino, C. F. R. Oliveira, S. W. de Lima Monteiro, F. S. Torres, Roana Melina de Oliveira Hansen

Research output: Contribution to conference without publisher/journalPaperResearchpeer-review

Abstract

The operating environment of aircraft air-data sensors is extremely aggressive with a wide temperature and humidity variation, suspension particles, icing and etc. The Pitot tube is widely used as air-data sensor on aircrafts, which has had many operational issues reported in the past decades due to ice-crystal obstruction of its aperture. The Microelectromechanical Systems (MEMS) technology associated with Thermal Mass Flow Sensors (TMFS) can establish a reformulation on air-data system instrumentation, since it is possible to create micro heaters and thermal sensors on the same substrate without moving parts, simplifying the operational requirements compliant to the aeronautics specifications. Exploring the simplicity and robustness of MEMS technology, a TMFS is herein designed according to criteria that meet aeronautic performance requirements, selecting adequate dimensions of the various structures in the sensor and materials compatible with semiconductor micromachining processes. This paper also presents the numerical results of the interaction of a thermal mass flowing through the integrated heater element of the sensor.

Original languageEnglish
Publication dateSep 2018
Publication statusPublished - Sep 2018
Event31st Congress of the International Council of the Aeronautical Sciences - Belo Horizonte, Brazil
Duration: 9. Sep 201814. Sep 2018

Conference

Conference31st Congress of the International Council of the Aeronautical Sciences
CountryBrazil
CityBelo Horizonte
Period09/09/201814/09/2018

Keywords

  • Aerospace systems
  • Air Data Systems
  • Aircraft Navigation
  • Microelectromechanical Systems
  • Thermal Mass Flow Sensor

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