Applied Aerodynamics Research Group (AARG)
High Speed Nozzle and Plume Studies
There is continued interest in the development of jet plumes from non-axisymmetric nozzles (in which increased mixing rates can be achieved), motivated by jet noise attenuation in civil applications and reduced IR signature for military applications.
An experimental investigation is undertaken of underexpanded supersonic jet plumes discharged from a rectangular nozzle and interacting with an extended shelf attached to the lower nozzle wall. Schlieren visualisation and LDA measurements are used to capture the plume development.
For high Nozzle Pressure Ratio, separation and reattachment of the plume from the shelf wall may occur. Asymmetric entrainment and unbalanced pressure forces in the underexpanded jet lead to lateral jet defelection. Mean velocity and turbulence data in the jet shear layers is used to expalin the observed plume spreading and trajectory and is proposed as validation data for CFD studies of this flow type.
- Funding body
- Rolls-Royce
- Project duration
- 2 years
- Project team (researchers)
- Dr Parviz Behrouzi
- Industrial collaborators
- Rolls-Royce
- Contact
- Professor Jim McGuirk
Project outputs / results
- Paper in 29th Applied Aerodynamics Conference, Hawaii,USA, June, 2011