An experimental study was conducted to investigate and compare the effects of beveled and double-beveled circular nozzles on supersonic jet screech at a nozzle pressure ratio of 5. In particular, near- and far-field microphone measurements and schlieren visualizations were utilized to look into selected acoustic and flow features associated with jet screech radiation. Results show that beveled nozzles eliminate jet screech by producing asymmetric shock structures and instability waves that are mismatched in phase and amplitude. In contrast, double-beveled nozzles produce symmetric shock structures and amplify screech intensity, even when jet mixing effects have been significantly enhanced. It is further observed that amplified jet screeches produced by double-beveled nozzles are highly unsteady and undergo nonperiodic and stochastic temporal variations. Last but not least, double-beveled nozzles also significantly impact screech peak noise locations and confer different changes along different measurement planes. The present study demonstrates that not all beveled-type nozzles are able to mitigate jet screech, with nonoptimal designs amplifying it instead.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Experimental Investigations of Screech Mitigation and Amplification by Beveled and Double-Beveled Nozzles


    Additional title:

    J. Aerosp. Eng.


    Contributors:
    Wei, X. F. (author) / Chua, L. P. (author) / Lu, Z. B. (author) / Lim, H. D. (author) / Mariani, R. (author) / Cui, Y. D. (author) / New, T. H. (author)

    Published in:

    Publication date :

    2022-07-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Prediction of Jet Noise From Circular Beveled Nozzles

    Paliath, Umesh / Morris, Philip | AIAA | 2005



    Acoustic Coupling of Twin Jets from Single-Beveled Nozzles

    Panickar, Praveen / Srinivasan, K / Raman, Ganesh | AIAA | 2004


    ACOUSTIC COUPLING OF TWIN JETS FROM SINGLE-BEVELED NOZZLES

    Panickar, P. / Srinivasan, K. / Raman, G. et al. | British Library Conference Proceedings | 2004