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

Kurzfassung

Simplified analytical method for determination of ow-heating effects on the wave drag of bodies based on the modeling of the thermal-spike phenomenon is presented. Some existing model conceptions addressing certain aspects of this phenomenon were complemented and refined to develop a method suitable for parameter studies. This method was adjusted using available results for the Mach 3 supersonic flow over conically nosed bodies, and then validated by experimental and numerical results for different blunt bodies with hemispherical, at and conical front faces. The ability to predict analytically 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.