A linear aerospike nozzle is a kind of altitude adaptive nozzle that has optimum performance over the entire operational range. In this work, flow characteristics of a linear plug nozzle and a truncated plug with 40% plug length are studied numerically. Different flow types associated with an increase in nozzle pressure ratio, corresponding wall pressure variation and shock patterns are studied. The effect of base pressure improvement with a secondary flow from the base (base bleed) of the truncated nozzle is also examined. Four base bleed points are considered, and the optimum bleed point is selected based on performance and base pressure improvement. The two-dimensional numerical model is solved using Reynolds-averaged Navier–Stokes equations with the Transition SST turbulence model. Validation shows that the present model is good enough at predicting the flow features associated with a linear plug nozzle. From the three different flow types associated with this nozzle, the transition from one type to other happens at lower nozzle pressure ratios with truncation due to the reduction in length of the plug. Thrust coefficient increased by 3.54% in the case of the bleed 3 configuration with a secondary flow of 2% of inlet mass flow rate when compared with 40% plug length without base bleed.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Numerical Analysis of Flowfield in Linear Plug Nozzle with Base Bleed


    Contributors:

    Published in:

    Publication date :

    2021-11-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Flowfield Analysis of Linear Plug Nozzle

    Chutkey, Kiran / Vasudevan, B. / Balakrishnan, N. | AIAA | 2012


    Flowfield Analysis of Linear Plug Nozzle

    Chutkey, K | Online Contents | 2012


    Plug Nozzle Flowfield Analysis

    T. Rommel / G. Hagemann / C.-A. Schley et al. | AIAA | 1997


    Plug Nozzle Flowfield Analysis

    Rommel, T. | Online Contents | 1997


    Analysis of Annular Plug Nozzle Flowfield

    Chutkey, K | Online Contents | 2014