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Article

Numerical Investigation of Effect of Parameters on Hovering Efficiency of an Annular Lift Fan Aircraft

by
Yun Jiang
* and
Bo Zhang
UAV Research Institute, Northwestern Polytechnical University, 127 West Youyi Road, Xi’an 710072, China
*
Author to whom correspondence should be addressed.
Aerospace 2016, 3(4), 35; https://doi.org/10.3390/aerospace3040035
Submission received: 14 August 2016 / Revised: 8 October 2016 / Accepted: 10 October 2016 / Published: 19 October 2016
(This article belongs to the Special Issue Aircraft Design (SI-1/2017))
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Abstract

The effects of various parameters on the hovering performance of an annular lift fan aircraft are investigated by using numerical scheme. The pitch angle, thickness, aspect ratio (chord length), number of blades, and radius of duct inlet lip are explored to optimize the figure of merit. The annular lift fan is also compared with a conventional circular lift fan of the same features with the same disc loading and similar geometry. The simulation results show that the pitch angle of 27°, the thickness of 4% chord length, the aspect ratio of 3.5~4.0, 32 blades, and the radius of inlet lip of 4.7% generate the maximum figure of merit of 0.733. The optimized configuration can be used for further studies of the annular lift fan aircraft.
Keywords: annular duct; ducted fan; lift fan; hovering efficiency; optimization; aircraft annular duct; ducted fan; lift fan; hovering efficiency; optimization; aircraft

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MDPI and ACS Style

Jiang, Y.; Zhang, B. Numerical Investigation of Effect of Parameters on Hovering Efficiency of an Annular Lift Fan Aircraft. Aerospace 2016, 3, 35. https://doi.org/10.3390/aerospace3040035

AMA Style

Jiang Y, Zhang B. Numerical Investigation of Effect of Parameters on Hovering Efficiency of an Annular Lift Fan Aircraft. Aerospace. 2016; 3(4):35. https://doi.org/10.3390/aerospace3040035

Chicago/Turabian Style

Jiang, Yun, and Bo Zhang. 2016. "Numerical Investigation of Effect of Parameters on Hovering Efficiency of an Annular Lift Fan Aircraft" Aerospace 3, no. 4: 35. https://doi.org/10.3390/aerospace3040035

APA Style

Jiang, Y., & Zhang, B. (2016). Numerical Investigation of Effect of Parameters on Hovering Efficiency of an Annular Lift Fan Aircraft. Aerospace, 3(4), 35. https://doi.org/10.3390/aerospace3040035

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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