Infrared and Laser Engineering, Volume. 50, Issue 11, 20210084(2021)
Influence of design of convergent-divergent nozzle on aerodynamic and infrared characteristics of serpentine 2-D exhaust system
Figures & Tables(18)
Fig. 1. Geometric model of the reference axisymmetric exhaust system
Fig. 2. Geometrical parameters of serpentine 2-D convergent-divergent nozzle
Fig. 3. Side and top views of three serpentine 2-D convergent-divergent exhaust system
Fig. 4. Serpentine 2-D convergent-divergent exhaust system with afterbody
Fig. 6. Grid of flow field and wall in serpentine 2-D convergent-divergent exhaust system
Fig. 8. Contrast of streamline distribution on symmetry plane of nozzle expansion section
Fig. 10. Comparison of constant temperature line in symmetric plane of serpentine 2-D convergent-divergent exhaust system
Fig. 12. CO2component concentration distribution on the symmetry plane
Fig. 13. Comparison of integral infrared radiation intensity on side detection plane
Fig. 14. Comparison of integral infrared radiation intensity on upper and lower detection plane
Table 1. Design parameters of serpentine 2-D convergent-divergent nozzle
View tableView in ArticleTable 1. Design parameters of serpentine 2-D convergent-divergent nozzle
Parameter Model A1 Model A2 Model A3 LD/D 0.641 LC/D 0.9 L/D 1.64 S8/ D 0.286 A8/A6B 0.3 A9/A6B 0.37 (S8-S9)/D 0.30 0.26 0.26
Table 2. Boundary conditions
View tableView in ArticleTable 2. Boundary conditions
Pt/Pa Tt/ K WCO2 WH2O WCO Core 3.14 850 0.066 0.025 0.000 1 Bypass 3.10 350 - - - Flow field 1 244.8 - - -
Table 3.
Cd andCf of three serpentine 2-D convergent-divergent exhaust systemView tableView in ArticleTable 3.
Cd andCf of three serpentine 2-D convergent-divergent exhaust systemItem Axis A1 A2 A3 Cd 0.922 0.917 0.935 0.920 Cf 0.975 0.939 0.942 0.926
Table 4. Sensitivity analysis of average integral infrared radiation intensity
View tableView in ArticleTable 4. Sensitivity analysis of average integral infrared radiation intensity
Parameter Sensitivity λ Side Upper Lower （S8-S9）/D 1.61 0.81 3.64 （W9-W8）/D −0.07 −0.05 −0.03
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Yuheng Wang, Honghu Ji, Wen Cheng, Jiquan Li. Influence of design of convergent-divergent nozzle on aerodynamic and infrared characteristics of serpentine 2-D exhaust system[J]. Infrared and Laser Engineering, 2021, 50(11): 20210084
Paper Information
Category: Infrared technology and application
Received: Jun. 20, 2021
Accepted: --
Published Online: Dec. 7, 2021
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