TY - JOUR
TI - Computational and experimental study on supersonic film cooling for liquid rocket nozzle applications
AU - Pisharady J C
AU - Balachandran P
AU - Vijayakumar V
JN - Thermal Science
PY - 2015
VL - 19
IS - 1
SP - 49
EP - 58
PT - Article
AB - An experimental and computational investigation of supersonic film cooling  (SFC) was conducted on a subscale model of a rocket engine nozzle. A  computational model of a convergent-divergent nozzle was generated,  incorporating a secondary injection module for film cooling in the divergent  section. Computational Fluid Dynamic (CFD) simulations were run on the model  and different injection configurations were analyzed. The CFD simulations  also analyzed the parameters that influence film cooling effectiveness.  Subsequent to the CFD analysis and literature survey an angled injection  configuration was found to be more effective, therefore the hardware was  fabricated for the same. The fabricated nozzle was later fixed to an  Air-Kerosene combustor and numerous sets of experiments were conducted in  order to ascertain the effect on film cooling on the nozzle wall. The film  coolant employed was gaseous Nitrogen. The results showed substantial cooling  along the walls and a considerable reduction in heat transfer from the  combustion gas to the wall of the nozzle. Finally the computational model was  validated using the experimental results. There was fairly good agreement  between the predicted nozzle wall temperature and the value obtained through  experiments.