• Corpus ID: 218470113

Passive flow-separation control in a dual-bell rocket nozzle

  title={Passive flow-separation control in a dual-bell rocket nozzle},
  author={Matteo Cimini and Emanuele Martelli and Matteo Bernardini},
  journal={arXiv: Fluid Dynamics},
A delayed detached eddy simulation of a sub-scale cold-gas dual-bell nozzle flow at high Reynolds number and in sea-level mode is carried out at nozzle pressure ratio NPR=45.7. In this regime the over-expanded flow exhibits a symmetric and controlled flow separation at the inflection point, that is the junction between the two bells, leading to the generation of a low content of aerodynamic side loads with respect to conventional bell nozzles. The nozzle wall-pressure signature is analysed in… 



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