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Proceedings Paper

Shock tunnel high-speed photography and CFD calculations on spike-tipped bodies
Author(s): Julio Srulijes; Patrick Gnemmi; Freidrich Seiler; Kay Runne
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Paper Abstract

A high speed differential interferometry based photography system was used to visualize the flow around a missile equipped with a forward directed spike mounted at the missile's nose. Pressure and temperature on the hemispherical surface of the nose can be substantially reduced by a forward facing spike. Both experiments and computations were carried out to study the flowfield around three-dimensional blunt bodies operated with a spike for a large range of angles of attack at a Mach number of 4.6. A blunt body, a classical disc-tipped spike, a sphere-tipped spike and a biconical-tipped spike have been studied. The experiments involved high-pressure shock tunnel investigations using the shock tube facility of ISL. The differential interferometry techniqe (DI) was used to visualize the flowfield around the different missile spike geometries. A series of eight flow pictures was obtained with the use of a multi-spark light source and a drum camera with rotating film. Steady-state 3D Navier-Stokes computations were carried out to predict the flow field around the spike-tipped missile. DI flow pictures were used to verify the numerical results of the computational calculations. Thus, reliable theoretical results are now available which point out the advantages/disadvantages of the spike geometries under investigation in comparison with the blunt body, especially with regard to drag reduction.

Paper Details

Date Published: 1 August 2003
PDF: 13 pages
Proc. SPIE 4948, 25th International Congress on High-Speed Photography and Photonics, (1 August 2003); doi: 10.1117/12.516788
Show Author Affiliations
Julio Srulijes, French-German Research Institute of Saint-Louis (France)
Patrick Gnemmi, French-German Research Institute of Saint-Louis (France)
Freidrich Seiler, French-German Research Institute of Saint-Louis (France)
Kay Runne, LFK Lenkflugkoerpersysteme GmbH (Germany)


Published in SPIE Proceedings Vol. 4948:
25th International Congress on High-Speed Photography and Photonics
Claude Cavailler; Graham P. Haddleton; Manfred Hugenschmidt, Editor(s)

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