Experimental investigations of flow field and heat transfer characteristics due to periodically pulsating impinging air jets

@article{Janetzke2008ExperimentalIO,
  title={Experimental investigations of flow field and heat transfer characteristics due to periodically pulsating impinging air jets},
  author={Timm Janetzke and Wolfgang Nitsche and Jens T{\"a}ge},
  journal={Heat and Mass Transfer},
  year={2008},
  volume={45},
  pages={193-206}
}
The paper concentrates on increasing convective heat transfer due to periodically pulsating impinging air jets. A maximum enhancement rate of cooling effectiveness up to 20% could be detected at an excitation Strouhal number of Sr = 0.82 when using a high pulsation magnitude. Reductions up to 5% occured at low Strouhal numbers with coincident high pulsation magnitudes as well. The thermal results were completed with phase-locked flow field investigations by means of PIV and surface… CONTINUE READING