A simplified physical model of engine nacelle was established. The effects of ventilation cooling and radiation shelter on reducing skin temperature were investigated by numerical simulation and experimental research. The internal heat transfer of the engine nacelle was also analyzed. Results show that the computational temperature distribution on the skin surface is in good accordance with the experimental result. Under the present zonal thermal boundary conditions of the heated wall

the ratio of total heat flux imposing on the inner surface of skin to the heat flux of heated wall is about 78% in case of no ventilation and radiation shelter. This ratio reduces to 20% when the ventilating velocity of the engine nacelle is 1m/s. When the ventilating velocity is increased from 0m/s to 3.5m/s

the maximum temperature on the skin is reduced about 10% relatively. The maximum temperature on the skin with radiation shelter is reduced about 6% in relative to the case without radiation shelter under no ventilation condition. Combination of ventilation and radiation shelter can achieve 50K reduction of maximum skin temperature in relative to the case of no ventilation and radiation shelter

with about 14% relative reduction.