Browsing by Author "Kshitij, Abhinav"

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    The development of a simple method for drag estimation for wedge-like fairings in hypersonic flow
    (ICAS, 2016-09-30) Roussel, Alexandre; Prince, Simon A.; Viguer, Matthieu; Kshitij, Abhinav; Stollery, John; Garry, Kevin
    The addition of wedge-like fairings onto the side of missiles and space launch vehicles, to shield devices such as cameras or reaction jet nozzles, creates additional drag, particularly when in supersonic/hypersonic flow. An experimental and computational study was performed to obtain data on wedge configurations and develop simple theories for the drag due to these types of fairings.
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    Drag estimation on wedge-shaped protuberances in high-speed flows
    (AIAA, 2020-01-05) Kshitij, Abhinav; Prince, Simon A.; Stollery, John L.
    A semi-empirical method is developed to estimate drag on wedge-shaped projections in hypersonic flow. Force balance measurements from gun tunnel tests directly measure total drag on blunt wedges, where the boundary layer and the entropy layer are weakly coupled. Detailed flowfield analysis from numerical simulations provides estimated locations of peak pressure ratio and skin friction. Schlieren images are used for detecting incipient separation in incoming flows with laminar and turbulent boundary layers. Test results indicate the presence of local hotspots at reattachment points of strong detached shocks on the wedge compression ramp, and of primary and secondary vortical structures around lateral faces. Total drag is found to decrease with decreasing bluntness but increasing slenderness in wedges tend to increase skin friction drag.