Theoretical Exploration of the Capabilities of 2D Flexible Wall Test Sections for 3D Testing

摘要

The applicability of two dimensional flexible solid wall test sections for three dimensional testing is theoretically investigated for linearized subsonic flow. The method uses known interference velocity distributions along a target line (derived from a method of images for this particular study). From these, wall shapes are calculated that reduce or eliminate the axial gradients of wall-induced upwash and blockage along this target line. The examples of residual wall interference presented show that these gradients, as well as the overall blockage level, can substantially be reduced by acceptable wall displacements and test section lengths, even for half model testing.