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Parametric Analysis...
Parametric Analysis of a Large-scale Cycloidal Rotor in Hovering Conditions
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- Xisto, Carlos, 1984 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Leger, J. (författare)
- Universidade da Beira Interior,University of Beira Interior
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- Páscoa, José (författare)
- Universidade da Beira Interior,University of Beira Interior
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- Gagnon, L. (författare)
- Politecnico di Milano,Polytechnic University of Milan
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- Masarati, P. (författare)
- Politecnico di Milano,Polytechnic University of Milan
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- Angeli, D. (författare)
- Universita Degli Studi Di Modena E Reggio Emilia,University of Modena and Reggio Emilia
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- Dumas, A. (författare)
- Universita Degli Studi Di Modena E Reggio Emilia,University of Modena and Reggio Emilia
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(creator_code:org_t)
- 2017
- 2017
- Engelska.
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Ingår i: Journal of Aerospace Engineering. - 1943-5525 .- 0893-1321. ; 30:1, s. 04016066-04016066-14-
- Relaterad länk:
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http://publications.... (primary) (free)
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- In this work, four key design parameters of cycloidal rotors, namely the airfoil section; the number of blades; the chord-to-radius ratio; and the pitching axis location, are addressed. The four parameters, which have a strong effect on the rotor aerodynamic efficiency are analyzed with an analytical model and a numerical approach. The numerical method is based on a finite-volume discretization of two-dimensional Unsteady Reynolds Averaged Navier-Stokes equations on a multiple sliding mesh, are proposed and validated against experimental data. A parametric analysis is then carried out considering a large-scale cyclogyro, suitable for payloads above 100 kg, in hovering conditions. Results demonstrate that the airfoil thickness significantly affects the rotor performance; such a result is partly in contrast with previous findings for small- and micro-scale configurations. Moreover, it will be shown that increasing the number of blades could result in a decrease of the rotor efficiency. The effect of chord-to-radius will demonstrate that values of around 0.5 result in higher efficiency. Finally it is found out that for these large systems, in contrast with micro-scale cyclogyros, the generated thrust increases as the pitching axis is located away from the leading edge, up to 35% of chord length. Further the shortcomings of using simplified analytical tools in the prediction of thrust and power in non-ideal flow conditions will be highlighted and discussed.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
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