Shock tunnel high-speed photography and CFD calculations on spike-tipped bodies

Julio Srulijes; Patrick Gnemmi; Freidrich Seiler; Kay Runne

doi:10.1117/12.516788

1 August 2003 Shock tunnel high-speed photography and CFD calculations on spike-tipped bodies

Julio Srulijes, Patrick Gnemmi, Freidrich Seiler, Kay Runne

Author Affiliations +

Proceedings Volume 4948, 25th International Congress on High-Speed Photography and Photonics; (2003) https://doi.org/10.1117/12.516788
Event: 25th international Congress on High-Speed photography and Photonics, 2002, Beaune, France

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.

Citation Download Citation

Julio Srulijes, Patrick Gnemmi, Freidrich Seiler, and Kay Runne "Shock tunnel high-speed photography and CFD calculations on spike-tipped bodies", Proc. SPIE 4948, 25th International Congress on High-Speed Photography and Photonics, (1 August 2003); https://doi.org/10.1117/12.516788

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