Numerical simulation and analysis of wall temperature based on the tangent oval model under different speed and radiation conditions

Abstract In this paper, the influence mechanism of flight speed, altitude and emissivity of skin material on the temperature of aircraft wall were systematically analysed by numerical simulation. The results show that the increase of the velocity would lead to the rise of the wall pressure and temperature of the aircraft. In addition, a speed of 5 Ma and flight altitude at 30 km, the heat transmitted to the outside was reduced with the decrease of skin material emission. As a result, the constant increase of its own heat energy, which led to the continuous rise of the wall temperature of the aircraft. And the total target radiation emission was reduced by 58.8% with the decrease of emissivity (from 0.8 to 0.2). These results show that the infrared radiation of the aircraft could effectively be suppressed by low emissivity material, the infrared stealth performance of aircraft was enhanced. The research has guiding significance for the temperature-resistant characteristics of skin materials and infrared radiation control.