TY - GEN
T1 - Experimental investigation on aerodynamic performance of coaxial rotor at low reynolds numbers
AU - Yamaguchi, Atsushi
AU - Golani, Raoul Sunil
AU - Fujita, Koji
AU - Nagai, Hiroki
N1 - Funding Information:
This work was conducted as the collaborative research project, J20I027, of the Institute of Fluid Science, Tohoku University, Japan.
Publisher Copyright:
© 2021, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2021
Y1 - 2021
N2 - Pit craters on Mars have attracted attention as a target for exploration. Mars helicopter, capable of vertical taking off, landing, and hovering, is suitable for this purpose. Recently, a coaxial rotor type helicopter has been proposed as a Mars exploration. We focused on this coaxial rotor for pit crater exploration. We investigated the aerodynamic performance of the coaxial rotor and its single rotor components in different configurations: with a flat plate and a triangular airfoil, at Reynolds numbers 6000, 11000, 16000, and in configurations of two and four blades per rotating surface. We used the thrust coefficient, torque coefficient, and Figure of Merit (FM) as an index of aerodynamic performance. The triangular airfoil was more efficient than the flat plate, but the rotor efficiency decreased due to a decrease in the Reynolds number. When the same number of blades were used, the coaxial rotor had a better thrust coefficient and worse FM than the single rotor.
AB - Pit craters on Mars have attracted attention as a target for exploration. Mars helicopter, capable of vertical taking off, landing, and hovering, is suitable for this purpose. Recently, a coaxial rotor type helicopter has been proposed as a Mars exploration. We focused on this coaxial rotor for pit crater exploration. We investigated the aerodynamic performance of the coaxial rotor and its single rotor components in different configurations: with a flat plate and a triangular airfoil, at Reynolds numbers 6000, 11000, 16000, and in configurations of two and four blades per rotating surface. We used the thrust coefficient, torque coefficient, and Figure of Merit (FM) as an index of aerodynamic performance. The triangular airfoil was more efficient than the flat plate, but the rotor efficiency decreased due to a decrease in the Reynolds number. When the same number of blades were used, the coaxial rotor had a better thrust coefficient and worse FM than the single rotor.
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M3 - Conference contribution
AN - SCOPUS:85100293798
SN - 9781624106095
T3 - AIAA Scitech 2021 Forum
SP - 1
EP - 12
BT - AIAA Scitech 2021 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
Y2 - 11 January 2021 through 15 January 2021
ER -