Optimal lifting surfaces of complicated-geometry wings at supersonic flight velocities
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Abstract
Infinitely thin wings weakly perturbing a supersonic flow of perfect gas are investigated. The flow problem is solved in a linear formulation [1]. The shape of the wing in plan and the Mach number M∞ of the oncoming flow are specified. The optimal wing surface is determined as a result of finding the function of the local angles of attack αM(x, z) which ensures a minimum of the drag coefficient cx when there are limitations in the form of equalities on the lift coefficient cy and the pitching moment mz. A separationless flow regime is realized on the optimal wing for the given number M∞, and its subsonic leading edge does not experience a load [2].
Keywords
Mach Number Drag Coefficient Supersonic Flow Leading Edge Lift Coefficient
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Literature cited
- 1.E. A. Xrasil'shchikova, A Thin Wing in a Compressible Flow [in Russian], Nauka, Moscow (1978).Google Scholar
- 2.V. N. Zhigulev, “Thin minimum drag wings,” in: Aeromechanics [in Russian], Nauka, Moscow (1976), pp. 24–31.Google Scholar
- 3.I. P. Logunov and G. L. Yakimov, “Calculated investigations of the drag of nonplane wings at supersonic velocities depending on the shape of their middle surfaces,” Tr. TsAGI, No. 1198, 3 (1970).Google Scholar
- 4.Ya. S. Shcherbak and L. A. Kosyachenko, “Theoretical shapes of the middle surface of a nonplane wing of a supersonic passenger aircraft,” Tr. Vyssh. Aviats. Uchilishcha Grazhd. Aviatsii, No. 41, 5 (1970).Google Scholar
- 5.N. P. Korobeinikov, “Optimal nonplane wings in a supersonic flow,” in: Chaplygin Lectures [in Russian], Sb. Dokl. TsITI Volna (1983), pp. 34–83.Google Scholar
- 6.E. M. Prokhorov, “Isoperimetric optimization of the surface of wings of simple shape in plan with allowance for thickness,” in: Problems of Aerodynamics of Bodies of Spatial Configuration [in Russian], Novosibirsk (1982), pp. 104–119.Google Scholar
- 7.Ya. S. Shcherbak and Yu. V. Adamenko, “Physical restrictions of linear theory in problems of the optimization of the aerodynamic characteristics of nonplane wings,” Tr. Vyssh. Aviats. Uchilishcha Grazhd. Aviatsii, No. 37, 4 (1969)Google Scholar
- 8.Yu, G. Bokovikov, “Calculation of the aerodynamic characteristics of complicated geometry wings in a supersonic flow,” Izv. Sib. Otd. Akad. Nauk SSSR, Ser. Tekh. Nauk, No. 2, 48 (1974).Google Scholar
- 9.I. V. Kurdyumov, M. V. Mosolova, and V. E. Nazaikinskii, “Computational algorithm for the problem of large-dimension quadratic programming,” Zh. Vychisl. Mat. Mat. Fiz.,18, 1119 (1978).Google Scholar
- 10.N. N. Glushkov, D. P. Krotkov, and L. M. Shkadov, “Variation of the aerodynamic shape of a body leading to the reduction of its drag,” Uch. Zap. TsAGI,3, 11 (1972).Google Scholar
- 11.A. P. Shashkin, “Complex of programs for the graphical interpretation of the results of a calculation,” Preprint No. 27 [in Russian], Institute of Theoretical and Applied Mechanics, Novosibirsk (1982).Google Scholar
- 12.R. M. Kulfan and A. Sigalla, “Real flow limitations in supersonic design,” J. Aircr.,16, 645 (1979).Google Scholar
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© Plenum Publishing Corporation 1986