Chengdu Institute of Aircraft Designing

Chengdu, China

Chengdu Institute of Aircraft Designing

Chengdu, China
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Zhang B.,Nanjing University of Aeronautics and Astronautics | Ji H.-H.,Nanjing University of Aeronautics and Astronautics | Zhang Z.-B.,Chengdu Institute of Aircraft Designing | Luo M.-D.,Chengdu Institute of Aircraft Designing | Lin L.-Z.,Nanjing University of Aeronautics and Astronautics
Hangkong Dongli Xuebao/Journal of Aerospace Power | Year: 2012

Numerical investigation was performed on the infrared suppress characteristics of the nozzles with and without cone cooled. In the former, cone and blade were cooled by secondary channel gas, and the temperatures of blade and cone walls were effectively decreased by 21.1% and 46.2% respectively, using only 1.6% of the secondary gas. The radiation of nozzle cavity in 3~5 μm was suppressed effectively, the radiation in the small view angle range from behind the nozzle decreased obviously, and the radiation decreased by 30% from straight behind the nozzle compared to the nozzle without cone cooling.


Zhang B.,Nanjing University of Aeronautics and Astronautics | Ji H.-H.,Nanjing University of Aeronautics and Astronautics | Huang W.,Nanjing University of Aeronautics and Astronautics | Cai X.,Nanjing University of Aeronautics and Astronautics | And 2 more authors.
Tuijin Jishu/Journal of Propulsion Technology | Year: 2013

The effects of metal plate on the characteristics of jet temperature, infrared radiation and wall temperature of nozzles were experimentally studied. The results show that using metal plate can enhance heat transfer between hot jet and nozzle wall, making the hot jet temperature decreased while wall temperature increased. The detective infrared radiation of hot jet in 3~5 μm spectrum was decreased by 38.5% detected from 90°using metal plate. And the reasons of infrared radiation intensity changes were given from the aspects of changing hot jet, nozzle wall and metal plate temperature.

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