Abstract
The influence of the nitrogen dissociation on the interactions due to the interference of two planar shock waves in a hypersonic high enthalpy flow is theoretically investigated for infinite reaction rates. The two limiting cases of infinitely slow and infinitely fast reactions are modelled as a perfect gas and an ideal dissociating gas in chemical equilibrium.
To investigate the influence of finite reaction rates on the interactions of shock waves, experiments are performed in the “high enthalpy shock tunnel Göttingen” (HEG) with a wind tunnel model consisting of a wedge type shock generator and a transversally mounted cylinder. The pressure and heat transfer loads resulting from the shock wave interferences are measured and the flow field is visualized by means of interferograms. The experimental results are compared with the results of a numerical simulation for a dissociating nitrogen flow and with the experimental results for a perfect gas flow.
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References
Anderson JD Jr (1988) Hypersonic and high temperature gas dynamics. McGraw-Hill Book Company
Brück S, Brenner G, Kortz S (1993) Numerical Simulation of Shock-Shock Interactions in Nonequilibrium Flow. DLR IB-2221-93 A09
Burcham FW, Nugent J (1970) Local Flow field around a pylon mounted dummy ramjet engine on the x-15-2 airplane for Mach numbers from 2.0 to 6.7. NASA TN D-5638
Edney B (1968) Anomalous heat transfer and pressure distributions on blunt bodies at hypersonic speeds in the presence of an impinging shock. FFA Report 115
Eitelberg G, McIntre TJ, Beck W, Lacey J (1992) The high Enthalpy Shock Tunnel in Göttingen. AIAA 92-3942
Grauer-Carstensen H (1991) Messungen von Druck und Wärmefluß im HEG. DLR IB 222-91 A 26
Holden MS, Moselle JR, Lee F (1991) Studies of aerothermal loads generated in Regions of shock/shock interaction in Hypersonic Flow. NASA-CR-181893
Hornung H (1972) Non-equilibrium dissociating nitrogen flow over spheres and circular cylinders. J Fluid Mech 53 Part I, pp 149–176
Hornung H (1990) Dissociative Real Gas Effects in High-Enthalpy Flows. Lecture Notes, private communication
Kastell D, Eitelberg G, Kortz S, Fleck B (1994) Holographic interferometry in high temperature flows using the high enthalpy shock tunnel Göttingen (HEG). Proceedings of the European Symposium on Optics for Productivity in Manufacturing, Frankfurt a.M., Germany
Kortz S (1993) Zum Einfluß der Stickstoffdissoziation auf die Wechselwirkung zwischen Stoßwellen in Hochenthalpieströmungen. Dissertation (University of Hannover) published as DLR-FB 93-57
Klopfer GH, Yee HC (1988) Viscous Hypersonic Shock-on-Shock Interaction on Blunt Cowl Lips. AIAA-88-0233
Lighthill MJ (1957) Dynamics of a dissociating gas Part I Equilibrium flows. J Fluid Mech 2 pp 1–32
McIntosh MK (1968) Computer program for the numerical calculation of frozen and equilibrium conditions in shock tunnels. Report, Department of Physics, Australian National University
Oswatitsch K (1952) Gasdynamik. Springer-Verlag, Wien, p 273
Paull A, Stalker R (1992) Test flow disturbances in an expansion tube. J FLuid Mech 245S, 293–521
Stewart RJ, Thareja RR, Wieting AR, Morgan K (1988) Application of Finite Element and Remeshing Technique to Shock Interference on a cylindrical Leading Edge. AIAA-88-0368
Tannehill JC, Holst TL (1976) Numerical Computation of Two-Dimensional Viscous Blunt Body Flows with an Impinging Shock. AIAA Journal 142, pp 204–211
Vardavas IM (1984) Modelling reactive gas flows within shock tunnels. Aust J Phys 37, pp 157–177
Wieting AR, Holden MS (1989) Experimental Shock-wave interference heating on a cylinder at Mach 6 and 8 AIAA Journal 27 11, pp 1557–1565
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Kortz, S., Kastell, D. & Eitelberg, G. On the interference of a weak and a strong shock wave in a dissociating nitrogen flow. Shock Waves 4, 253–265 (1995). https://doi.org/10.1007/BF01416036
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DOI: https://doi.org/10.1007/BF01416036