Doublet Lattice Aerodynamic Predictions for an Oscillating F-5Wing with Stores.

摘要

The Doublet Lattice Method with the Method of Images was used to predict Unsteady Aerodynamic Coefficients and Pressures on a Model F-5 Wing with various store configurations, oscillating in subsonic flow. Various finite element lattice configurations were tested to obtain numerical convergence and indicate the optimum modelling technique. Test conditions included Mach numbers of .6, .8, .9 and .95. At each Mach number, oscillation frequencies of 0, 20 Hz, and 45 Hz were considered. Convergence studies confirmed the utility and accuracy of Multhopp or sinusoidal lattice distributions. Steady state pressure predictions compared favorably to those obtained by Woodward's Method. Predictions showed significant increases in aerodynamic forces caused by adding tip stores to the wing. (Author)