23rd Congress of International Council of the Aeronautical Sciences, 8-13 September, 2002, Toronto, Canada
Paper ICAS 2002-R39

TIME-LINEARISED TRANSONIC SMALL DISTURBANCE CODE INCLUDING ENTROPY AND VORTICITY EFFECTS

E. Ly, J. Nakamichi
NAL, Japan

Keywords: adi, entropy, shock, time-linearised, transonic, tsd equation, vorticity

The effect of small perturbations on steady transonic small-disturbance flowfield is studied. A time-linearised time domain solution method that includes the shock motion effects via a "shock jump correction procedure", and shock-generated entropy and vorticity effects, is presented. This correctly accounts for the small-amplitude shock motions due to small unsteady changes in the aerofoil boundary condition. Computed pressure distributions are compared with those obtained from the NAL's Euler computer code.

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