Abstract
Parabolized stability equations (PSE) approach is used to investigate linear as well as nonlinear evolution of disturbance in an axisymmetric, supersonic, low Reynolds number jet. Both axisymmetric and helical modes are considered and nonparallel effect is found to increase the disturbance growth rate. Interaction of the helical modes, which are the dominant instability modes of the jet, brings in strong nonlinear effects and results in disturbance saturation, spectrum filling and large mean flow distortions. The computed nonlinear evolution of disturbances is in reasonably good agreement with the experimental data. Present results appear to suggest that the axisymmetric mode is a more efficient radiator of acoustic waves. However, owing to the large growth rate of the helical mode, the significance of the axisymmetric mode diminishes and it is not expected to play an important role in the acoustic wave radiation when helical modes are present in the disturbance spectrum.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
