ZHANG Bo, JI Hong-hu, ZHANG Zong-bin, et al. Numerical investigation of effect of truncated cone with different cooling structures on infrared suppressing characteristics of nozzle cavities[J]. 2014, (10).
ZHANG Bo, JI Hong-hu, ZHANG Zong-bin, et al. Numerical investigation of effect of truncated cone with different cooling structures on infrared suppressing characteristics of nozzle cavities[J]. 2014, (10).DOI: 10.13224/j.cnki.jasp.2014.10.012.
The characteristics of infrared suppressing on 3-5μm band of truncated cone
which was one of the high temperature components of engine nozzle were numerically investigated. Different arrangements of film cooling gap and film cooling hole structures were disposed on the truncated cone which showing strong infrared characteristics
and cold gas flowed into truncated cone through blades from by-pass channel
causing wall temperature drop of truncated cone and blades
furthermore
the infrared radiation intensity was depressed. By comparison of the two cooling structures
it is found that the method of film cooling gaps downwards can make wall temperature and infrared radiation intensity decrease more than that of film cooling holes