An Aerodynamic Study for the 3rd Configuration of JAXA High Speed Compound Helicopter

This study focuses on the aerodynamic characteristics of a high speed compound helicopter with a maximum cruise speed of 500km/h which JAXA is proposing for the use of EMS (Emergency Medical Service). The aerodynamic properties of the airframe are evaluated by the wind tunnel testing with various co...

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Published inJOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES Vol. 69; no. 6; pp. 257 - 261
Main Authors Kobiki, Noboru, Tanabe, Yasutada, Sugawara, Hideaki, Kimura, Keita, Sugiura, Masahiko
Format Journal Article
LanguageJapanese
Published Tokyo THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 2021
Japan Science and Technology Agency
Subjects
Aerodynamic characteristics
Aerodynamic Interference
Airframe Drag
Airframes
Compound Helicopter
Compound helicopters
Drag
Emergency medical services
Emergency services
High speed
Lift
Low speed wind tunnels
Rotors
Synergistic effect
Wind Tunnel Test
Wind tunnel testing
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Summary:This study focuses on the aerodynamic characteristics of a high speed compound helicopter with a maximum cruise speed of 500km/h which JAXA is proposing for the use of EMS (Emergency Medical Service). The aerodynamic properties of the airframe are evaluated by the wind tunnel testing with various configurations carried out in JAXA 2 m × 2 m Low-Speed Wind Tunnel. In order to realize this high speed flight condition, the essential requirement is to achieve a very low drag/aerodynamic interference airframe. The test results show 15% lower than the target airframe drag by adopting the hub fairing and 12% improvement of lift/drag ratio by differential deployment of the flap equipped on the wing combining the synergistic effect with the lift offset generated by the main rotor.
ISSN:1344-6460
2432-3691
DOI:10.2322/jjsass.69.257