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
In order to investigate the aerodynamic and infrared characteristics of serpentine 2-D convergent-divergent exhaust system, three serpentine 2-D exhaust system with right behind full-shield convergent-divergent nozzle were designed. The effect of centre line offset-diameter ratios between throat and outlet, (S8-S9)/D=0.26-0.3, and width expansion ratios between throat and outlet, (W9-W8)/D=0.1-0.36, on aerodynamic and infrared characteristics was studied numerically. The results show that relative to the axisymmetric exhaust system, the infrared radiation intensity of three serpentine 2-D convergent-divergent exhaust systems decrease by 73.4% on average in the range of 0°-15° for tail direction, and decrease at least 60.3% in the 90° direction of side, upper, lower detection plane, the decrease of infrared radiation characteristics increases with the decrease of (S8-S9)/D, increases with the increase of (W9-W8)/D, and more sensitive to (S8-S9)/D. The thrust coefficient of three serpentine 2-D convergent-divergent exhaust systems increases with the decrease of (S8-S9)/D and (W9-W8)/D.
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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
Category: Infrared technology and application
Received: Jun. 20, 2021
Accepted: --
Published Online: Dec. 7, 2021
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