Simplified model for flow-heating effect on wave drag and its validation

Kurzfassung

A simplified prediction method for determination of flow-heating effects on the wave drag of bodies based on the combined analytical–empirical model of the thermal-spike phenomenon is presented. The existing model conceptions addressing certain aspects of this phenomenon were complemented and refined to develop a method suitable for parameter studies. Some reliable experimental and numerical results for the Mach 3 supersonic flow over conically nosed bodies were used as training data to estimate empirically the model parameters. Finally, the method was cross validated by the different available results for blunt bodies with hemispherical, flat, and conical front faces. By this opportunity, the ability to predict the influence of some crucial parameters has successfully been demonstrated for the heat input ratio at steady and periodic heating, the normalized heated-wake/filament diameter, the Mach number, and the specific heat capacity. Read More: http://arc.aiaa.org/doi/abs/10.2514/1.J054604