NUMERICAL-SIMULATION OF THE FLOW OVER A BODY FLYING THROUGH A THERMALIN A STRATIFIED ATMOSPHERE

The three-dimensional supersonic viscous flow over a blunted body flyi ng horizontally through a cloud of hot gas (a thermal) is studied nume rically. It is assumed that the cloud was formed as the result of a po werful explosion in the Earth's atmosphere. Consideration is given to the late stage of the explosion, corresponding to the vortex ring form ation time. A complete problem is unstable. However, the air flow near the body at every point of the flight trajectory can be considered as a quasi-stationary flow, in view of the fact that the ratio of the ch aracteristic time scale in the shock layer to the thermal characterist ic time scale is 10(-5). The aerodynamic and heat transfer characteris tics of the flying body are studied.