Abstract
In this paper, the characteristics of a pressure wave propagating against two parallel subsonic streams in a constant-area straight duct are investigated by one-dimensional analysis, two-dimensional numerical simulation, and experiments. Computations have been carried out by the two-dimensional Euler Equations using the Chakravarthy-Osher-type TVD scheme. Optical observations by the schlieren method as well as wall pressure measurements have been performed to clarify both the structure and the propagation velocity of pressure waves. The results show that the pressure wave propagating against the streams changes into a bifurcated pressure wave and the bifurcation occurs in the low speed streams. It is also found that the propagation velocity of the pressure wave obtained by the analysis and computation agrees well with the present experimental data.
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Pearson, H, Holliday, J B, Smith, S F. A Theory of the Cylindrical Ejector Supersonic Propelling Nozzle. J. Royal Aeronautical Society, 1958, 62: 746–751
Hoge, H J, Segars, R A. A Generalization of the Concept and Some Experimental Data. AIAA J., 1965, 3(12): 2177–2183
Bernstein, A, Heiser, W H, Hevenor, C. Compound-Compressible Nozzle Flow. Trans. ASME, J. Applied Mechanics, 1967, 34(3): 548–554
Fage, E L. Apparent Subsonic Choking in Dual Stream Nozzles and Practical Consequences. AIAA paper No. 74-1176, 1974
Fage, E L. Apparent Subsonic Choking in Dual Stream Nozzles. AIAA J., 1976, 14(5): 681–683
Decher, R. Nonuniform Flow through Nozzles. J. Aircraft, 1978, 15(7): 416–421
Decher, R. Mass Flow and Thrust Performance of Nozzle with Mixed and Unmixed Nonuniform Flow. Trans. ASME, J. Fluids Engineering, 1995, 117(4): 617–622
Clark, L T. Application of Compound Flow Analysis to Supersonic Ejector-Mixer Performance Prediction. AIAA paper, No. 95-0645, 1995
Lewis, M J, Hastings, D E. The Influence of Flow Non-Uniformities in Air-Breathing Hypersonic Propulsion Systems. AIAA paper, No. 87-2079, 1987
Sato, T, Kaji, S. Study on Steady and Unsteady Unstart Phenomena Due to Combustor of Scramjet Engines. AIAA paper, No. 92-5102, 1992
Schindel, L. Effect of Nonuniform Nozzle Flow on Scramjet Performance. J. Propulsion and Power, 1999, 15(2): 363–364
Sajben, M. Propagation of Weak Compression Waves in Nonuniform Channel Flows. J. Aircraft, 1989, 5(2): 154–157
Katanoda, H, Miyazato, Y, Masuda, M, et al. Pitot Pressure of Correctly-expanded and Underexpanded Free Jets from Axisymmetric Supersonic Nozzles. Shock Waves, 2000, 10(2): 95–101
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Yonamine, M., Ushijima, T., Miyazato, Y. et al. Propagation of weak pressure waves against two parallel subsonic streams. J. of Therm. Sci. 15, 135–139 (2006). https://doi.org/10.1007/s11630-006-0135-2
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DOI: https://doi.org/10.1007/s11630-006-0135-2