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Flow visualization of separation on a shrouded rotor inlet in a crosswind

Asia-Pacific International Symposium on Aerospace Technology (APISAT 2015)

Abstract: A shrouded rotor can generate a powerful thrust and reduce the risk to people during a collision accident. Therefore, it is suitable for a small vertical takeoff and landing unmanned aerial vehicle. However, flow separation occurs on the wall of the rotor in a crosswind, and the controllability of the pitching moment becomes worse during horizontal flight. Although previous studies on shrouded rotors revealed the occurrence of flow separation and a change in the pitching moment with the angle of attack, the correlation between them was unclear. The flow separation phenomena in a crosswind were investigated using a laser light technique and computational fluid dynamics (CFD) simulation for flow visualizations. Wind tunnel test results clarified the expansion of the separation region with changes in the rotor speed and angle of attack. The CFD simulation revealed an asymmetric pressure distribution in the shrouded rotor in a crosswind.

To cite this article: Otsuka, Hikaru and Nagatani, Keiji. Flow visualization of separation on a shrouded rotor inlet in a crosswind [online]. In: Asia-Pacific International Symposium on Aerospace Technology (APISAT 2015). [Canberra]: Engineers Australia, 2015: 395-407. Availability: <http://search.informit.com.au/documentSummary;dn=270940479291083;res=IELENG> ISBN: 9781922107480. [cited 29 Apr 17].

Personal Author: Otsuka, Hikaru; Nagatani, Keiji; Source: In: Asia-Pacific International Symposium on Aerospace Technology (APISAT 2015). [Canberra]: Engineers Australia, 2015: 395-407. DOI: Document Type: Conference Paper ISBN: 9781922107480 Subject: Computational fluid dynamics; Laser communication systems; Rotors (Helicopters)--Aerodynamics; Drone aircraft--Control systems; Peer Reviewed: Yes Affiliation: (1) Department of Aerospace Engineering, Tohoku University, 468-1-502, Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi, Japan
(2) New Industry Creation Hatchery Centre, Tohoku University, 6-6-10, Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi, Japan

Database: Engineering Collection