This paper compares the mixing promoting efficiency of two identical sharp and truncated vertex right-angled triangular tabs provided with semicircular, triangular, and square corrugations along its edges, offering geometrical blockage of 2.5% each, placed at the exit of a Mach 2 circular nozzle was studied experimentally. To quantify the effectiveness of the controlled jets in mixing, Pitot pressure along the jet axis and the jet spread along and normal to the tabs were measured, covering highly overexpanded and marginal underexpanded levels at the nozzle exit. The results reveal that the corrugated tabs enhance mixing higher than the uncorrugated (plain) tabs, for both sharp and truncated vertices. For the jet controlled with sharp vertex right-angled triangular tabs, a maximum reduction of about 91% in core length is caused by the square corrugation at NPR7. The corresponding core length reduction caused by semicircle, triangular corrugated, and plain tabs is about 87, 85, and 65%, respectively. For the jet controlled with truncated vertex right-angled triangular tabs also, the core length reductions are of the same order as those for the sharp vertex triangular tabs. The jet mixing is strongly influenced by the combined effect of tab geometry, corrugation shape, tip effect, and expansion ratio. The shadowgraph pictures clearly show that the waves in the controlled jets are made weaker than those of the uncontrolled jet.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Corrugated right-angled triangular tabs for supersonic jet control


    Contributors:


    Publication date :

    2015




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    55.50 Luftfahrzeugtechnik / 55.60 Raumfahrttechnik
    Local classification TIB:    275/7040



    Corrugated right-angled triangular tabs for supersonic jet control

    Arun Kumar, P / Rathakrishnan, E | SAGE Publications | 2015


    Corrugated triangular tabs for supersonic jet control

    Kumar, P Arun | Online Contents | 2014


    Corrugated triangular tabs for supersonic jet control

    Kumar, P Arun / Rathakrishnan, E | SAGE Publications | 2014


    Corrugated Tabs for Supersonic Jet Control

    Phanindra, B. Chiranjeevi / Rathakrishnan, E. | AIAA | 2010


    Corrugated Tabs for Supersonic Jet Control

    Phanindra, B C | Online Contents | 2010