Nonlinear effects caused by pulsed periodic supply of energy in the vicinity of a symmetric airfoil in a transonic flow |
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Authors: | S M Aulchenko V P Zamuraev A P Kalinina |
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Institution: | (1) Institute of Theoretical and Applied Mechanics, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090 |
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Abstract: | Changes in the structure of a transonic flow around a symmetric airfoil and a decrease in the wave drag of the latter, depending
on the energy-supply period and on localization and shape of the energy-supply zone, are considered by means of the numerical
solution of two-dimensional unsteady equations of gas dynamics. Energy addition to the gas ahead of the closing shock wave
in an immediate vicinity of the contour in zones extended along the contour is found to significantly reduce the wave drag
of the airfoil. The nature of this decrease in drag is clarified. The existence of a limiting frequency of energy supply is
found.
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Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 47, No. 3, pp. 64–71, May–June, 2006. |
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Keywords: | transonic flow wave drag energy supply Euler equations |
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