The pressure and temperature distributions on the surface of a model of serpentine twodimensional（2D）nozzle exhaust system were measured

and its infrared radiation(IR) intensity on the side

lower and upper detection planes were also measured; these results were compared with those of a relevant axisymmetric exhaust system. The results showed that

the radiation intensity of serpentine 2D nozzle exhaust system on the upper detection plane was much higher than that on other two planes

with the maximum value at angle 10°; compared with axisymmetric exhaust system

the radiation intensity of serpentine 2-D nozzle exhaust system reduced by 75.5% at angle 0°

and 57.6%

50.9% and 17.3% at angle 90° respectively on the side

lower and upper detection planes.