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

Hikaru Otsuka, Keiji Nagatani

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)

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.

Original languageEnglish
Pages395-407
Number of pages13
Publication statusPublished - 2015 Jan 1
Event7th Asia-Pacific International Symposium on Aerospace Technology, APISAT 2015 - Cairns, Australia
Duration: 2015 Nov 252015 Nov 27

Other

Other7th Asia-Pacific International Symposium on Aerospace Technology, APISAT 2015
CountryAustralia
CityCairns
Period15/11/2515/11/27

Keywords

  • CFD
  • Flow separation
  • Laser light sheet technique
  • Multi-rotor UAV
  • Shrouded rotor

ASJC Scopus subject areas

  • Aerospace Engineering

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