Experiments was conducted to study the distribution of wall temperature and infrared radiation characteristics on two dimensional convergent-divergent (2D-CD) vectoring nozzle exhaust system in three geometric deflection states

deflection of 0

10

20 degrees

and the results were compared with the reference axisymmetric nozzle exhaust system. The experimental results show that the infrared radiation characteristics is significantly lower than the reference axisymmetric nozzle exhaust system with a decline of 10% in the tail direction. With the increase of geometric deflection angle

the temperature of heat shield wall

convergent section wall increase

and the temperature of pressure side wall in deflection section increase slightly

while the temperature of suction side wall in deflection section decrease slightly

where the maximum change value is 30K; the increasing angle also significantly enhances the infrared radiation intensity

especially

in the tail direction from 15° to 45° and from -15° to -60°

where the maximum increase reaches 70%.