pp. 1023-1032 | Article Number: iejme.2016.092
Published Online: July 29, 2016
Article Views: 462 | Article Download: 505
The oscillations of shock wave structures have been reviewed. The particular attention has been brought to oscillations related to the base pressure problem as to the most important problem of the flow over the bottom parts of aircrafts. Landmark research on problem of base drag, as well as of oscillation occurrence at bottom part of nozzle blocks and channels are given. The problem of supersonic air inleak onto the obstruction is reviewed. Great attention is paid to results of experimental research and to analysis of calculation issues. The mechanisms of feedback occurrence and self-oscillation maintenance are described. Shock wave oscillation arises during the supersonic flow collision with obstruction. It is a result of complex interaction between forces of viscous friction in mixing layers and shock wave structure elements transformation. Due to its relation to filling and emptying of flow regions with stagnation and low velocity, this mechanism was called “the consumption mechanism”. Acoustic feedback has an impact on the amplitude-frequency characteristics of oscillation, but do not cause them.
Keywords: Gas-dynamic discontinuity; shock wave structure; oscillation of shock wave structures; base pressure
Albazarov, B. Sh. (1991) Numerical simulation of the interaction of a supersonic jet with an obstacle: PhD thesis, Krasnoyarsk, Russia. 16p.
Anderson, J. S. & Williams, T. J. (1968) Base pressure and noise produced by the abrupt expansion of air in a cylindrical duct. Journal of Mechanical Engineering Science, 10(3), 262–268.
Bulat, M. P. & Bulat, P. V. (2013) Comparison of turbulence models in the calculation of supersonic separated flows. World Applied Sciences Journal, 27(10), 1263–66.
Bulat, P. V. & Prodan, N. V. (2013) On the low-frequency oscillations of expenditure base pressure. Fundamental Research, 14(3), 545-549.
Bulat, P. V., Zasukhin, O. N. & Uskov, V. N. (1990) Mechanisms of non-stationary processes in a channel with a sudden expansion. Proceedings of XV All-Union seminar on gas jet. 21p.
Bulat, P. V., Zasukhin, O. N. & Uskov, V. N. (2012) On classification of flow regimes in a channel with sudden expansion. Thermophysics and Aeromechanics, 19(2), 233-246.
Chow, W. L. (1959) On the base pressure resulting from the Interaction if a supersonic external stream with a sonic or subsonic jet. J. Ae. Sci., 26, 176-186.
Crocco, L. (1958) One-dimensional treatment of steady gas dynamics. Fundamentals of gas dynamics, 3, 259-274.
Fabri, J. & Siestrunck, R. (1958) Supersonic air ejectors. Advances in applied mechanics. New York: Academic Press. 34p.
Ginzburg, I. P. (1958) Applied Hydrodynamics. Leningrad: Leningrad State University press. 325p.
Ginzburg, I. P., Sokolov, E. I. & Uskov, V. N. (1976) Types of wave structure in the interaction of a convergent jet with an infinite two-dimensional obstruction. Journal of Applied Mechanics and Technical Physics, 17(1), 35-39.
Gorshkov, G. F., Uskov & V. N. & Ushakov, A. P. (1991) Oscillatory interaction between an underexpanded jet and an obstacle in the presence of a supersonic sheathed flow. Journal of Applied Mechanics and Technical Physics, 32(4), 512-518.
Grabitz, G. (1979) Model calculations of self-excited oscillations in transonic flow in a duct with an abrupt enlargement. Sixth International Conference on Numerical Methods in Fluid Dynamics Lecture Notes in Physics, 90, 268-273.
Jungowski, W. M. (1969) On the flow in a sudden enlargement of a duct. Fluid Dynamics Transactions, 4, 231-241.
Karashima, K. (1961) Base pressure on two-dimensional blunt-trailing-edge wings at supersonic velocity. University of Tokyo, Aero, Research Institute Report, 368(27), 8-11.
Mach, E. Uber den Verlauf von Funkenwellen in der Ebene und im Raume. Sitzungsbr Akad Wien, 78, 819-838.
Martin, B. W. & Baker, P. J. (1963) Experiments on a supersonic parallel diffuser. Journal of Mechanical Engineering Science, 5(1), 98-113.
Meier, G. E., Grabitz, G., Jungowski, W. M., Witczak, K. J. & Anderson, J. S. (1980) Oscillations of the supersonic flow downstream of an abrupt increase in duct cross section. AIAA Journal, 18(4), 394-395.
Neumann, E. P. & Lustwerk, F. (1949). Supersonic diffusers for wind tunnels. J. appl. Mech., 16(2), 195-211.
Savin, A. V. & Sokolov, E. I. (1998) Influence of rarefaction on oscillations in an underexpanded jet impinging upon a flat plate. Proceedings of Proc. 21st Intern. Symp. RGD, 623-630.
Semiletenko, V. G., Sobkolov & B. N., Uskov, V. N. (1972) Sheme of shock-wave processes in an unstable interaction between jet and an obstacle. Journal of USSR Academy of Science. Technical sciences, 13(3), 39-41.
Sizov, A. M. (1987) Gas dynamics and heat transfer of gas jets in metallurgical processes. Moscow: Publishing house “Mettalurgy”. 256p.
Wick, R. S. (1953) Effect of boundary layer on sonic flow through an abrupt cross-sectional area change. J. aero Scl., 20(10), 675-682.
Zapryagaev, V. I., Uskov, V. N. & Gaponov, S. A. (2000) Jet and Unsteady Flows in Gas Dynamics. Novosibirsk: Siberian Branch of the Russian Academy of Sciences Press. 245p.