As a propulsion system for vertical take-off and landing (VTOL) aircraft, the gas-driven fan propulsion system has received some attention in recent years due to its simple mechanical structure and good performance. During the operation of the propulsion system, the core turbofan exhaust is directed to the tip turbine to drive the ducted fan to obtain thrust, and the louvered vector exhaust device is used to achieve lift/thrust switching. However, due to the linkage characteristics of the guide vanes of the exhaust device, the exhaust area will gradually change with the deflection of the guide vanes. This may cause uncertain effects on the system. Besides, considering the development cost of the propulsion system, it is necessary to clarify whether the core turbofan needs to be redesigned based on the characteristics of the system. Further, the transitional performance (VTOL to flight) of the propulsion system also needs to be studied. To this end, this study established an overall model of the gas-driven fan propulsion system combined with the characteristics of the core turbofan to analyze these problems. The results indicate that the louvered vector exhaust device can well match the gas-driven fan propulsion system. And when the propulsion system is composed, the gas-driven fan will not significantly affect the operation characteristics of the core turbofan. Besides, the preliminary analysis shows that the gas-driven fan propulsion system can meet the power requirements of the transition state of the fixed-wing VTOL aircraft. And the characteristics of the propulsion system may make the take-off thrust-weight ratio requirement of the fixed-wing VTOL aircraft be as low as 1.1.
BearRHoefJLaceyT. Flight demonstration of the AV-8B V/STOL concept. In: Aircraft systems and technology meeting, New York, USA, 20–22 August 1979, 1979.
2.
GerdesR. Lift-fan aircraft - lessons learned from XV-5 flight experience. In: International powered lift conference, Santa Clara, USA, 1–3 December 1993, 1993.
3.
LaceyTMillerK. The AV-8B wing - aerodynamic concept and design. In: V/STOL Conference, Palo Alto, USA, 6–8 June 1977, 1977.
4.
StenbergK. YAV-8B flight demonstration program. In: Aircraft prototype and technology demonstrator symposium, Dayton, USA, 23–24 March 1983, 1983.
5.
CorgiatALindGHartselJ. Fan-in-wing technology, from the XV-5A to the present. In: International powered lift conference, Santa Clara, USA, 1–3 December 1993, 1993.
6.
ProbertSDRamsdenKWYinJ, et al.Assessment of variable‐cycle propulsion systems for ASTOVL. Aircr Eng Aerosp Technol2000; 72(6): 537–544.
7.
BevilaquaPM. Genesis of the F-35 joint strike fighter. J Aircr2009; 46(6): 1825–1836. DOI: 10.2514/1.42903.
8.
SylvesterTSylvesterTBrownR, et al.F-35B lift fan inlet development. In: AIAA centennial of naval aviation forum “100 years of achievement and progress”, Virginia Beach, VA, 21–22 September 2011, 2011.
9.
LeeHPrasadRChoiS. Aerodynamic analysis for conceptual design of a lift-fan type aircraft. In: 34th AIAA applied aerodynamics conference, Washington, DC, 13–17 June 2016, 2016.
10.
MehraRWasikowskiMPrasanthR, et al.Model predictive control design for XV-15 tilt rotor flight control. In: AIAA guidance, navigation, and control conference and exhibit, Montreal,Canada, 6–9 August 2001, 2001.
11.
JudasMDeligiannidisN. Tilt wing demonstrator concept design. In: 2013 International powered lift conference, Los Angeles, CA, 12–14 August 2013, 2013.
12.
ShenJKangH. Comparison study of tiltrotor whirl flutter using two rotorcraft comprehensive analyses. J Aircr2017; 54(2): 845–850. DOI: 10.2514/1.C033905.
13.
ChenYZhengJShenZ, et al.Design, analysis and tests of a tri-tiltrotor aircraft. In: AIAA aviation 2019 forum, Dallas, Texas, 17–21 June 2019, 2019.
14.
FootohiPBouskelaAShkarayevSV. Aerodynamic design of long-range VTOL UAV. In: AIAA Scitech 2019 forum, San Diego, California, 7–11 January 2019, 2019.
15.
WangXYuanXZhuJ, et al.Stability analysis of tailsitters in vertical takeoff and landing flights. J Aircr2019; 56(4): 1487–1500. DOI: 10.2514/1.C035209.
16.
ZhouYHuangGXiaC. Analysis of fixed-wing VTOL aircraft with gas-driven fan propulsion system. Aerosp Sci Technol2020; 104: 105984.
17.
RaabSAZhangJBhardwajP, et al.Proposal of a unified control strategy for vertical take-off and landing transition aircraft configurations. In: 2018 applied aerodynamics conference, Atlanta, Georgia, 25–29 June 2018, 2018.
18.
YeoH. Design and aeromechanics investigation of compound helicopters. Aerosp Sci Technol2019; 88: 158–173. DOI: 10.1016/j.ast.2019.03.010.
19.
StengelRF. Flight Dynamics. Princeton, NJ: Princeton University Press, 2015.
20.
WangYZhouYLinC. Modeling and control for the mode transition of a novel tilt-wing UAV. Aerosp Sci Technol2019; 91: 593–606.
21.
CasadoHCristobalELoridoA, et al.A tip-turbine driven propulsion fan concept. In: Proceedings of the ASME turbo expo 2002: power for land, sea, and air, Amsterdam, The Netherlands, 3–6 June 2002, 2002. pp. 877–885.
22.
XinXHuangGLuW, et al.High bypass ratio turbofan engine with additional tip-driving fan: a design innovation. In: 51st AIAA/SAE/ASEE joint propulsion conference, Orlando, FL, 27–29 July 2015, 2015.
23.
LiLHuangGChenJ, et al.Numerical experiment of tip-jet ducted fans with various nozzles. In: 53rd AIAA/SAE/ASEE joint propulsion conference, Atlanta, GA, 10–12 July 2017, 2017.
24.
LiLHuangGChenJ. Aerodynamic characteristics of a tip-jet fan with a large blade pitch angle. Aerosp Sci Technol2019; 91: 49–58.
25.
SokheyJVittalBLamD, et al.Development of a telescoping vaned exhaust nozzle for the ASTOVL liftfan application. In: 1997 world aviation congress, Anaheim, USA, 13–16 October 1997, 1997.
26.
WiegandC. F-35 air vehicle technology overview. In: 2018 aviation technology, integration, and operations conference, Atlanta, Georgia, 25–29 June 2018, 2018.
AttiaMSPortDFRozendaalAV. A hybrid vortex solution for surge margin enhancement in axial compressors. In: 52nd AIAA/SAE/ASEE joint propulsion conference, Salt Lake City, UT, 25–27 July 2016, 2016.
29.
DeSommaAKRobertsRAWolffM, et al.Power, thermal, and controls interaction within an adaptive turbine engine. In: 2018 AIAA aerospace sciences meeting, Kissimmee, Florida, 8–12 January 2018, 2018.
30.
DengSYueSWangH. Experimental study of a ducted contra-rotating lift fan for V/STOL UAV application. In: 35th AIAA applied aerodynamics conference, Denver, Colorado, 5–9 June 2017, 2017.
31.
JuZTengJZhuM, et al.Flow characteristics on a 4-stage low-speed research compressor with a cantilevered stator. Aerosp Sci Technol2020; 105: 106033.
32.
FanCAmankwa AdjeiRWuY, et al.Parametric study on the aerodynamic performance of a ducted-fan rotor using free-form method. Aerosp Sci Technol2020; 101: 105842.
33.
SellersJFDanieleCJDYNGEN: A program for calculating steady-state and transient performance of turbojet and turbofan engines. NASA-TN-D-7901, 1975.
34.
FishbachL. Computer simulation of engine systems. In: 18th aerospace sciences meeting, Pasadena, USA, 14–16 January 1980, 1980.
35.
StamatisAMathioudakisKPapailiouKD. Adaptive simulation of gas turbine performance. J Eng Gas Turbines Power1990; 112(2): 168–175.
36.
ZhangS. A simplified real-time engine model for developing aeroengine control system. In: 28th joint propulsion conference and exhibit, Nashville, USA, 6–8 July 1992, 1992.
37.
KongXWangXTanD, et al.A non-iterative aeroengine model based on volume effect. AIAA modeling and simulation technologies conference, Portland, Oregon, 8–11 August 2011, 2011.
38.
ClarkRVastaS. Development of the AV-8B propulsion system. In: Aircraft design systems and operations meeting, San Diego, USA, 31 October–02 November 1984, 1984.
39.
HullDG. Fundamentals of Airplane Flight mechanics. Berlin, New York: Springer, 2007.
40.
TheysBDe VosGDe SchutterJ. A control approach for transitioning VTOL UAVs with continuously varying transition angle and controlled by differential thrust. In: 2016 international conference on unmanned aircraft systems (ICUAS), Arlington, USA, 7–10 June 2016, 2016. pp. 118–125.
41.
LiuZTangSLiM, et al.Optimal control of thrust-vectored VTOL UAV in high-manoeuvering transition flight. Aeronaut J2018; 122(1250): 598–619.
42.
XiliYYongFJihongZ. Transition flight control of two vertical/short takeoff and landing aircraft. J Guid Control Dyn2008; 31(2): 371–385. DOI: 10.2514/1.29112.
43.
RaymerD. Aircraft Design: A Conceptual Approach. Reston, VA: American Institute of Aeronautics and Astronautics, Inc., 2012.
