Model-based analysis of boundary layer ingestion effect on lateral-directional aerodynamics using differentiated boundary conditions

Abstract

The noteworthy feature of aircraft with distributed propulsion configuration is the integration of a blended-wing-body type airframe and an embedded distributed propulsion system, thus inducing the specific boundary layer ingestion effect. Different boundary layer ingestion effects on the distributed engines may generate asymmetric flow fields on the airframe surface, and then lead to the unique lateral-directional aero-propulsive close coupling. To investigate the lateral-directional aerodynamics influenced by boundary layer ingestion, a new comprehensive computational method based on the differentiated boundary conditions is proposed. This method uses a synthetic three-dimensional computational model including the airframe and multi-engine to analyze the aerodynamic characteristics, and the essential boundary conditions can be extracted from the thermodynamic distributed propulsion system model to represent the different boundary layer ingestion intensities on the left and right engines. Subsequently, detailed model-based analyses of boundary layer ingestion influences on the lateral-directional aerodynamic characteristics are conducted, and the influence regularities under different flight states are revealed. All the results demonstrate that the differentiated boundary layer ingestion intensities on distributed engines can certainly affect the roll and yaw aerodynamic performance of the distributed propulsion configuration aircraft.

Keywords

Boundary layer ingestion lateral-directional aerodynamics distributed propulsion configuration computational fluid dynamics differentiated boundary conditions

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References

Dangelo MM. N+3 small commercial efficient and quiet transportation for year 2030–2035. Report no. NASA/CR-2010-216691, US, 2010.

Mody PC, Sato S, Hall DK, et al. Conceptual design of an N+3 hybrid wing body subsonic transport. In: The 28th AIAA applied aerodynamics conference, Chicago, IL, USA, 28 June to 1 July 2010, AIAA paper 2010-4812.

Liebeck

. Design of the blended wing body subsonic transport. J Aircraft 2004; 41: 10–25.

Hileman JI, Spakovszky ZS and Drela M. Airframe design for “Silent Aircraft”. In: The 45th AIAA aerospace sciences meeting and exhibit, special session: towards a silent aircraft, Reno, NV, USA, 8–11 January 2007, AIAA paper 2007-453.

Hileman JI, Spakovszky ZS, Drela M, et al. Aerodynamic and aeroacoustic three-dimensional design for a “Silent” aircraft. In: The 44th AIAA aerospace sciences meeting and exhibit, Reno, NV, USA, 9–12 January 2006, AIAA paper 2006-241.

Hileman

Spakovszky

Drela

et al.

Airframe design for silent fuel-efficient aircraft. J Aircraft 2010; 47: 956–969.

Elmiligui AA, Fredericks WJ, Guynn MD, et al. Numerical investigation of a fuselage boundary layer ingestion propulsion concept. In: Aviation technology, integration, and operations conference, Los Angeles, CA, USA, 12–14 August 2013, AIAA paper 2013-4402.

Kok HJ, Voskuijl M and Tooren MJ. Distributed propulsion featuring boundary layer ingestion engines for the blended wing body subsonic transport. In: The 51st AIAA/ASME/ASCE/AHS/ASC structures, structural dynamics and materials conference, Orlando, FL, USA, 12–15 April 2010, AIAA paper 2010-3064.

Atinault O, Carrier G, Grenon R, et al. Numerical and experimental aerodynamic investigations of boundary layer ingestion for improving propulsion efficiency of future air transport. In: The 31st AIAA applied aerodynamics conference, San Diego, CA, USA, 24–27 June 2013, AIAA paper 2013-2406.

10.

Felder JL, Kim HD, Brown GV, et al. An examination of the effect of boundary layer ingestion on turboelectric distributed propulsion systems. In: The 49th AIAA aerospace sciences meeting including the new horizons forum and aerospace exposition, Orlando, FL, USA, 4–7 January 2011, AIAA paper 2011-300.

11.

Plas A. Performance of a boundary layer ingesting propulsion system. Master Thesis, Massachusetts Institute of Technology, USA, 2006.

12.

Plas AP, Sargeant MA, Madani V, et al. Performance of a boundary layer ingesting propulsion system. In: The 45th AIAA aerospace sciences meeting and exhibit, Reno, NV, USA, 8–11 January 2007, AIAA paper 2007-450.

13.

Stoll AM, Bevirt JB, Moore MD, et al. Drag reduction through distributed electric propulsion. In: The 2014 Aviation technology, integration, and operations conference, Atlanta, GA, USA, 16–20 June 2014, AIAA paper 2014-2851.

14.

Ochs SS, Tillman G, Joo J, et al. CFD-based analysis of a boundary layer ingesting propulsion. In: The 51st AIAA/SAE/ASEE joint propulsion conference, Orlando, FL, USA, 27–29 July 2015, AIAA paper 2015-3800.

15.

Kim H, and Liou MS. Flow simulation of N2B hybrid wing body configuration. In: The 50th AIAA aerospace sciences meeting including the new horizons forum and aerospace exposition, Nashville, TN, USA, 9–12 January 2012, AIAA paper 2012-0838.

16.

Lugo

Doulgeris

Singh

. Computational analysis of the effects of a boundary layer ingesting propulsion system in transonic flow. Proc IMechE, Part G: J Aerospace Engineering 2012; 227: 1215–1232.

17.

Kerho M. Aero-propulsive coupling of an embedded, distributed propulsion system. In: The 33rd AIAA applied aerodynamics conference, Dallas, TX, USA, 22–26 June 2015, AIAA paper 2015-3162.

18.

Wick AT, Hooker JR and Hardin CJ. Integrated aerodynamic benefits of distributed propulsion. In: The 53rd AIAA aerospace sciences meeting, Kissimmee, FL, USA, 5–9 January 2015, AIAA paper 2015-1500.

19.

Kang WW, Zhang J and Yang LY. Research on boundary layer ingestion effects of distributed propulsion configuration. In: The 2014 IEEE Chinese guidance, navigation & control conference, Yantai, China, 8–10 August 2014.

20.

Blanco ER, Hall CA and Crichton D. Challenges in the silent aircraft engine design. In: The 45th AIAA aerospace sciences meeting and exhibit, special session: towards a silent aircraft, Reno, NV, 8–11 January 2007, AIAA paper 2007-454.

21.

Ge H. Research on modeling technology for high bypass ratio turbofan engine. Master Thesis, Nanjing University of Aeronautics and Astronautics, China, 2013.