Fig. 1. Schematic diagram of axisymmetric exhaust system

Fig. 2. Schematic diagram of serpentine 2-D exhaust system

Fig. 3. Assemble coating schemes of low-emissivity materials on the center cone and mixer

Fig. 4. Schematic diagram of experiment system

Fig. 5. Core inlet (a); central cone (b); nozzle wall (c) temperature change curves with time

Fig. 6. Infrared radiation measurement system

Fig. 7. Sketch map of infrared radiation detection points

Fig. 8. Wall temperature distribution of axisymmetric nozzle and center cone in different coating states

Fig. 9. Temperature change of centerline on every side surface ofserpentine 2-D nozzle in different coating states

Fig. 10. Nondimensional integral radiation intensity of axisymmetric exhaust system in different coating states

Fig. 11. Nondimensional integral radiation intensity of sider detection plane of serpentine 2-D exhaust system in different coating states

Fig. 12. Nondimensional integral radiation intensity of upper and lower detection plane of serpentine 2-D exhaust system in different coating states

Fig. 13. Visible high temperature components of serpentine 2-D exhaust system at the 5° and 10° viewing anglesS弯二元喷管 5°和10°时的可视高温部件