2020 article

Time-Dependent Aerodynamic Loads on Single and Tandem Stores in a Supersonic Cavity

JOURNAL OF AIRCRAFT, Vol. 57, pp. 702–714.

By: D. Chin n, A. Turpin n & K. Granlund n 

co-author countries: United States of America πŸ‡ΊπŸ‡Έ
Source: Web Of Science
Added: August 17, 2020

To understand time-dependent aerodynamic loads on single and tandem (fore/aft) slender cylinders translated out into the supersonic freestream from a cavity at Mach 1.5, the normal force and pitching moment are experimentally obtained via load cells. For a single long store, the measurements were conducted with two different angles of attack at several static positions and with dynamic motions. For tandem stores, the fore- and aft-positioned stores were translated both independently and simultaneously with various time delays. The single long store results had good repeatability and revealed that the fastest dynamic motions exhibited unsteady forces and moments that differed from quasi-static results. Moreover, the results from the tandem stores showed that the aft-positioned store had more favorable aerodynamic loads as compared to the front store for the static measurements. However, when stores were ejected simultaneously or with time delay, the aft-positioned store was strongly affected by the forward-positioned store and showed bifurcation on the aerodynamic loads after the shear layer.