A THREE-DIMENSIONAL SOLUTION OF FLOWS OVER WINGS WITH LEADING-EDGE VORTEX SEPARATION PartⅠ—Engineering Document

摘要

A method of predicting forces, moments, and detailed surface pressures on thin, sharp-edged wings with leading-edge vortex separation in incompressible flow is presented. The method employs an inviscid flow model in which the wing and the rolled-up vortex sheets are represented by piecewise, continuous quadratic doublet sheet distributions. The Kutta condition is imposed on all wing edges.nComputed results are compared with experimental data and with the predictions of the leading-edge suction analogy for a selected number of wing planforms over a wide, range of angle of attack. These comparisons show the method to be very promising, capable of producing not only force predictions, but also accurate predictions of detailed surface pressure distributions, loads, and moments. Experience with the present computer program, however, is limited, and operational limitations related to doublet panel spacing and panel density requirements, behavior at large planform breaks, convergence characteristics, etc., have yet to be extensively explored.