Aerodynamic characteristics of a two-dimensional supersonic biplane, covering its take-off to cruise conditions
Tóm tắt
Supersonic biplanes can possibly achieve low-boom and low-drag supersonic flights. In the present study, aerodynamic analysis and design of two-dimensional (2-D) biplanes were investigated with the help of computational fluid dynamics (CFD) tools. By utilizing an inverse-design method, a 2-D biplane configuration with lower wave drag than the single flat-plate airfoil at sufficient lift conditions (C
l > 0.14) was designed at its design Mach number (M
∞ = 1.7). In general, although, supersonic biplanes show superior aerodynamic characteristics at their design Mach numbers, unfortunately, they are characterized by poor performances under their off-design conditions. Flow choking occurs at high subsonic speeds, and continues to Mach numbers greater than the design Mach number in the acceleration stage due to flow hysteresis. Hinged slats and flaps were applied as high-lift devices to avoid the flow choking and concomitant hysteresis problems, and were also used as actual high-lift devices under take-off and landing conditions. As further improvement, morphing and Fowler motion were considered. Finally, a series of 2-D biplane configurations from take-off (and landing) to cruise conditions were studied by applying the slats and flaps, as well as morphing mechanisms, to our inversely designed biplane.
Tài liệu tham khảo
Liepmann H.W., Roshko A.: Elements of Gas Dynamics, pp. 107–123. Wiley, New York (1957)
Oswatisch K., Kuerti G.: Gas Dynamics, pp. 419. Academic Press, New York (1956)
Ferri, A.: Elements of Aerodynamics of Supersonic Flows, pp. 154–160. Macmillan, New York (1949) (Also published as Dover Phoenix Edition, Dover Publications, New York (2005))
Bushnell D.M.: Shock wave drag reduction. Annu. Rev. Fluid. Mech. 36, 81–96 (2004)
Kusunose, K., Matsushima, K., Goto, Y., Yamashita, H., Yonezawa, M., Maruyama, D., Nakano, T.: A Fundamental Study for the Development of Boomless Supersonic Transport Aircraft. The 44th AIAA Aerospace Sciences Meeting and Exhibit, AIAA Paper, AIAA-2006-0654 (2006)
Kusunose, K., Matsushima, K., Obayashi, S., Furukawa, T., Kuratani, N., Goto, Y., Maruyama, D., Yamashita, H., Yonezawa, M.: Aerodynamic Design of Supersonic Biplane: Cutting Edge and Related Topics. The 21st Century COE Program International COE of Flow Dynamics Lecture Series, vol. 5. Tohoku University Press, Sendai (2007)
Maruyama, D., Matsushima, K., Kusunose, K., Nakahashi, K.: Aerodynamic Design of Biplane Airfoils for Low Wave Drag Supersonic Flight. The 24th AIAA Applied Aerodynamics Conference, AIAA Paper, AIAA-2006-3323 (2006)
Matsushima, K., Kusunose, K., Maruyama, D., Matsuzawa, T.: Numerical design and assessment of a biplane as future supersonic transport. In: Proceedings 25th ICAS Congress, ICAS 2006-3.7.1, 1–10 (2006)
Maruyama, D., Matsuzawa, T., Kusunose, K., Matsushima, K., Nakahashi, K.: Consideration at Off-design Conditions of Supersonic Flows around Biplane Airfoils. The 45th AIAA Aerospace Sciences Meeting and Exhibit, AIAA Paper, AIAA-2007-0687 (2007)
Furukawa, T., Kumagai, N., Oshiba, S., Ogawa, T., Saito, K., Sasoh, A.: Measurement of pressure field near Busemanns biplane in supersonic flow. In: Proceedings of the Annual Meeting and the Seventh Symposium on Propulsion System for Reusable Launch Vehicles, Northern Section of the Japan Society for Aeronautical and Space Sciences, G-17 (2006) (in Japanese)
Matsuo, K.: Compressive Fluid Dynamics, pp. 70–96, 142–171. Rikogakusha, Tokyo (1994) (in Japanese)
Licher, R.M.: Optimum Two-dimensional Multiplanes in Supersonic Flow, Report No. SM-18688, Douglass Aircraft Co. (1955)
Ogoshi, H., Shima, E.: Role of CFD in Aeronautical Engineering (15), Special Publication of National Aerospace Laboratory, SP-37. In: Proceedings of the 15th NAL Symposium, pp. 81–86 (1997) (in Japanese)
Matsushima, K., Maruyama, D., Nakano, T., Nakahashi, K.: Aerodynamic design of low boom and low drag supersonic transport using favorable wave interference. In: Proceeding of the 36th JSASS Annual Meeting, pp. 130–133 (2005) (in Japanese)
Matsushima, K., Maruyama, D., Matsuzawa, T.: Numerical modeling for supersonic flow analysis and inverse design. In: Proc. Lectures and Workshop International—Recent Advances in Multidisciplinary Technology and Modeling, SS05-2.1 (2007)
Nakahashi K., Ito Y., Togashi F.: Some challenge of realistic flow simulations by unstructured grid CFD. Int. J. Numer. Methods Fluids 43, 769–783 (2003)
Ito Y., Nakahashi K.: Surface triangulation for polygonal models based on CFD data. Int. J. Numer. Methods Fluids 39(1), 75–96 (2002)
Sharov D., Nakahashi K.: Reordering of hybrid unstructured grids for lower–upper symmetric Gauss–Seidel computations. AIAA J. 36(3), 484–486 (1998)
Ito, Y., Nakahashi, K.: Unstructured mesh generation for viscous flow computations. In: Proceedings of the 11th International Meshing Roundtable, pp. 367–377 (2002)
Spalart, P.R., Allmaras, S.R.: A One-equation Turbulence Model for Aerodynamic Flows, AIAA Paper 92-0439 (1992)
Moeckel, W.E.: Theoretical Aerodynamic Coefficients of Two-dimensional Supersonic Biplane, NACA T.N. No.1316 (1947)
Kobayashi, M., Odaka, Y., Kusunose, K.: A Fundamental Study of Wave-drag Reduction for Biplane at Off-design Conditions. The 38th Japan Society for Aeronautical and Space Sciences (JSASS) Annual Meeting, 2C16 (2007) (in Japanese)