Effects of tip-jet on the performance of a ducted fan

Abstract

Tip-jet technology has potential value for application in vertical take-off and landing or short take-off and landing concept aircraft. The main objective of this current work is to investigate the effects of the tip-jet on the performance of a ducted fan in hover. The overall flow field of the ducted fans with tip-jet was simulated by using the shear-stress transport k-omega turbulence model with a refined high-quality structured grid at various rotational speeds. The comparative analysis of the performances of the ducted fans with different tip-jet locations was carried out. The results indicate that the circulation of the blade with tip-jet is affected by the flow blockage, Coanda effect, and edge-shed vortex. These flow features were formed by the tip-jet. The fan’s thrust could be augmented when the nozzle was a little farther from the blade trailing edge. However, a higher jet flow utility efficiency could be achieved when the nozzle was close to the blade trailing edge.

Keywords

Tip-jet ducted fan aerodynamic performance tip flow numerical investigation

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References

Roos FW. Mr. Mac’s helicopters. In: 41st aerospace sciences meeting and exhibit, aerospace sciences meetings, Reno, Nevada, AIAA 2003-290, 2003.

Kestner

Tai

JCM

Mavris

. Computationally efficient methodology for generating training data for a transient neural network of a tip-jet reaction drive system. J Eng Gas Turbines Power 2011; 133(12): 121601–121601-11.

Schwartz

Reader

Rogers

. An unmanned air vehicle concept with tip-jet drive. J Am Helicopter Soc 1994; 39(3): 67–74.

Phillips JD. An efficient tip jet drive. In: AIAA aircraft design systems and operations meeting, Baltimore, MD, USA, 1991.

Mitchell CA and Vogel BJ. The Canard rotor wing (CRW) aircraft-a new way to fly. In: AIAA/ICAS international air and space symposium and exposition: the next 100 years, Dayton, Ohio, AIAA 2003-2517, 2003.

Kong

Park

Kang

. A study on transient performance characteristics of the canard rotor wing type unmanned aerial vehicle propulsion system during flight mode transition. J Eng Gas Turbines Power 2006; 128(3): 573–578.

Raeisi

Alighanbari

. Effects of tilting rate variations on the aerodynamics of the tilting ducted fans mounted at the wing tips of a vertical take-off and landing unmanned aerial vehicle. Proc IMechE, Part G: J Aerospace Engineering 2018; 232(10): 1803–1813.

Wang

Chen

Guo

. Numerical analysis of aerodynamic characteristics for the design of a small ducted fan aircraft. Proc IMechE, Part G: J Aerospace Engineering 2012; 227(10): 1556–1570.

Sheng

Zhao

. Numerical investigations of fan-in-wing aerodynamic performance with active flow control. J Aircr 2017; 54: 2317–2329.

10.

Chen

Huang

. Numerical investigations of ducted fan aerodynamic performance with tip-jet. Aerosp Sci Technol 2018; 78: 510–521.

11.

Wang

, et al. Experimental investigation on separation control by slot jet in highly loaded compressor cascade. Proc IMechE, Part G: J Aerospace Engineering 2017; 232(9): 1704–1714.

12.

Gao

Wei

Liu

, et al. Experimental and numerical investigations of hole injection on the suction side throat of transonic turbine vanes in a cascade with trailing edge injection. Proc IMechE, Part G: J Aerospace Engineering 2018; 232(8): 1454–1466.

13.

Arne

Fischer

Saathoff

, et al. Numerical investigations of the efficiency of circulation control in a compressor stator. J Turbomach 2012; 134: 021012–1-11.

14.

Zenouz

Ababaf Behbahani

Rousta

, et al. Experimental investigation on flow unsteadiness during spike stall suppression process in an axial compressor via air injection. Proc IMeche, Part G: J Aerospace Engineering 2017; 231(14): 2677–2688.

15.

Qin

Song

Wang

, et al. Flow separation control on a highly loaded compressor cascade using endwall synthetic jets. Proc IMechE, Part G: Journal Aerospace Engineering 2017; 232(11): 2059–2075.

16.

Li L, Huang G, Chen J, et al. Numerical experiment of tip-jet ducted fans with various nozzles. In: AIAA propulsion and energy forum, 53rd AIAA/SAE/ASEE joint propulsion conference, Atlanta, GA, AIAA 2017-5093, July 2017.

17.

Crossley

Rutherford

. Sizing methodology for reaction-driven, stopped-rotor vertical take-off and landing concepts. J Aircr 1995; 32(6): 1367–1374.

18.

Caradonna FX and Tung C. Experimental and analytical studies of a model helicopter rotor in Hover. NASA Technical Memorandum 81232, 1981.

19.

Yang

. Efficient numerical techniques for simulating a rotorcraft flow field with overlapping grids. AIAA J 2015; 53(5): 1372–1383.

20.

Goodson KW and Grunwald KJ. Aerodynamic loads on an isolated shrouded-propeller configuration for angles of attack from-10 deg to 110 deg. NASA TN D-955, 1962.