Abstract
The mechanism of shocklets is studied theoretically and numerically for the stationary fluid, uniform compressible flow, and boundary layer flow. The conditions that trigger shock waves for sound wave, weak discontinuity, and Tollmien-Schlichting (T-S) wave in compressible flows are investigated. The relations between the three types of waves and shocklets are further analyzed and discussed. Different stages of the shocklet formation process are simulated. The results show that the three waves in compressible flows will transfer to shocklets only when the initial disturbance amplitudes are greater than the certain threshold values. In compressible boundary layers, the shocklets evolved from T-S wave exist only in a finite region near the surface instead of the whole wavefront.
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References
Passot, T. A. and Pouquet, A. Numerical simulation of compressible homogeneous flows in the turbulent regime. Journal of Fluid Mechanics, 181, 441–466 (1987)
Sandham, N. D. and Reynolds, W. C. Compressible mixing layer: linear theory and direct simulation. AIAA Journal, 28(4), 618–624 (1990)
Yuan, X. J. and Zhou, H. A numerical study for small amplitude T-S waves in a supersonic boundary layer. Applied Mathematics and Mechanics (English Edition), 21(12), 1211–1214 (2000) do]10.1007/BF02459212
Shen, Q., Zhang, H. X., and Yuan, X. J. Numerical simulation of shock-lets within the supersonic boundary layer. Acta Aerodynamica Sinica, 18, 103–108 (2000)
Huang, Z. F. and Zhou, H. Evolution of a 2D disturbance in a supersonic boundary layer and the generation of shocklets. Applied Mathematics and Mechanics (English Edition), 25(1), 1–8 (2004) do]10.1007/BF02437288
Cao, W. and Zhou, H. A numerical investigation of the evolution of 2-D disturbances in hypersonic boundary layers and the effect on the flow structure due to the existence of shocklets. Science in China Series G, 47(2), 244–255 (2004)
Samtaney, R., Pullin, D. I., and Kosović, B. Direct numerical simulation of decaying compressible turbulence and shocklet statistics. Physics of Fluids, 13(5), 1415–1430 (2001)
Coleman, B. D., Herrera, I., and Truesdell, C. Wave Propagation in Dissipative Materials, Springer, New York (1965)
Witham, G. B. On the propagation of weak shock wave. Journal of Fluid Mechanics, 1, 290–318 (1956)
Mack, L. M. Stability of the compressible laminar boundary layer according to a direct numerical simulation. AGARD 97 Part 1, AGARD, Tennessee, U.S.A., 329–362 (1965)
Liepmann, H. W. and Roshko, A. Elements of Gasdynamics, Wiley, New York (1957)
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Project supported by the National Natural Science Foundation of China (No. 10872018)
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Yuan, Xj., Tian, Jw., Shen, Q. et al. Shocklets in compressible flows. Appl. Math. Mech.-Engl. Ed. 34, 1453–1464 (2013). https://doi.org/10.1007/s10483-013-1759-7
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DOI: https://doi.org/10.1007/s10483-013-1759-7