Development of a wind retrieval method for low-speed low-pressure flows for ExoMars

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Soria-Salinas, ÁlvaroLuleå tekniska universitet,Rymdteknik (author)

Development of a wind retrieval method for low-speed low-pressure flows for ExoMars

Article/chapterEnglish2020

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Elsevier,2020
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LIBRIS-ID:oai:DiVA.org:ltu-80534
https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80534URI
https://doi.org/10.1016/j.applthermaleng.2020.115752DOI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

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Validerad;2020;Nivå 2;2020-08-24 (alebob)
Forced convective heat transfer from three horizontally inclined rectangular-based cylinders (rods) has been studied experimentally under representative Martian near-surface air flows in the Aarhus Wind Tunnel Simulator (AWTS), Denmark. The testing campaign was developed for the HABIT (Habitability: Brines, Irradiation and Temperature) instrument, European payload on board the ExoMars 2022 Kazachok surface platform. The average heat transfer coefficient was determined from steady CO2 flows at a pressure of 9.9 mbar, an ambient temperature of ∼25 °C, and for horizontal free-stream velocities between 0.8 and 12 m/s. A retrieval algorithm to derive the wind speed from the average heat transfer coefficient estimated at each of the three HABIT Air Temperature Sensors (ATS) rods was calibrated within the AWTS. The ATS rods are placed one at the front of the instrument structure (ATS2) and two on the sides (ATS1 and ATS3); and under Martian atmospheric conditions these rods serve as cooling fins. Several relationships between the Nusselt number and the Reynolds and Prandtl numbers reported in the literature were evaluated to model convective heat transfer from the ATS rods. Where needed, corrections to account for radiative heat transfer within the AWTS were implemented. The final retrieval method demonstrated that wind speed can be retrieved for frontal winds in the range of 0–10 m/s, with an error of ±0.3 m/s, using the cooling profile of the ATS rod 3, and for lateral winds in the range of 0–6 m/s, with an error of ±0.3 m/s, using the ATS rod 2 cooling profile.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Maskinteknik Rymd- och flygteknik hsv//swe
ENGINEERING AND TECHNOLOGY Mechanical Engineering Aerospace Engineering hsv//eng
Heat transfer coefficient
Forced convection
Wind tunnel
Nusselt number
Experiments
Mars
Atmosfärsvetenskap
Atmospheric science

Added entries (persons, corporate bodies, meetings, titles ...)

Zorzano, María-PazLuleå tekniska universitet,Rymdteknik,Centro de Astrobiología (INTA-CSIC), Torrejón de Ardoz, 28850 Madrid, Spain(Swepub:ltu)marzor (author)
Mantas-Nakhai, RobertoLuleå tekniska universitet,Rymdteknik(Swepub:ltu)robman (author)
Martín-Torres, JavierLuleå tekniska universitet,Rymdteknik,Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR), 18100 Granada, Spain(Swepub:ltu)javmar (author)
Luleå tekniska universitetRymdteknik (creator_code:org_t)

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In:Applied Thermal Engineering: Elsevier1801359-43111873-5606

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