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Numerical heat tran...
Numerical heat transfer study of a space environmental testing facility using COMSOL Multiphysics
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- Vakkada Ramachandran, Abhilash (författare)
- Luleå tekniska universitet,Rymdteknik
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- Zorzano Mier, María-Paz (författare)
- Luleå tekniska universitet,Rymdteknik,Centro de Astrobiología (CSIC-INTA), Torrejón de Ardoz, Madrid 28850, Spain; School of Geosciences, University of Aberdeen, Aberdeen AB24 3FX, UK
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- Martín-Torres, Javier (författare)
- Luleå tekniska universitet,Rymdteknik,School of Geosciences, University of Aberdeen, Aberdeen AB24 3FX, UK; Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR), Granada 18100, Spain
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(creator_code:org_t)
- Elsevier, 2022
- 2022
- Engelska.
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Ingår i: Thermal Science and Engineering Progress. - : Elsevier. - 2451-9049. ; 29
- Relaterad länk:
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https://doi.org/10.1...
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visa fler...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Environmental chambers are used to test the expected performance of space instrumentation and to investigate certain processes which are relevant in space or other planetary environments. In this study, a computational model of an existing Martian experimental facility is investigated numerically using COMSOL Multiphysics. For this purpose, we simulate the near surface water cycle under Martian temperature and pressure experimental conditions as tested inside the chamber and we compare the simulations with the experimental data. The model shows good agreement with experiments on the equilibration time scales and thermal gradients. Due to the imposibility to place sensors at multiple locations inside the chamber, we use the model to extrapolate the one-point relative humidity of the experimental data to each grid points in the simulation. This model gives an understanding of the gradient in atmospheric water relative humidity to which the experimental samples such as deliquescent salts and Martian regolith simulants are exposed at different time intervals. The of the performance of HABIT instrument during the tests, of the ESA/IKI ExoMars 2022 robotic mission to Mars, when compared with the model shows the existence of an extra internal heating source of about 1 W which can be attributed to the hydration and deliquescence of the salts exposed to Martian conditions when in contact with atmospheric moisture. In addition, the presented model is used to predict the thermal gradients and understand the time response when the chamber is heated in vacuum conditions. Our analysis shows that for thermal vacuum tests, the chamber will take about 2.5 h to reach the test temperature of 420 K.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
Nyckelord
- 3D model
- Heat transfer
- Mars
- Space chamber
- Test facility
- Vacuum
- Atmospheric science
- Atmosfärsvetenskap
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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