A theoretical exploration of the capabilities of 2D flexible wall test sections for 3D testing

A theoretical exploration of the capabilities of 2D flexible wall test sections for 3D testing

Smith, J.

National Aerospace Laboratory NLR

1984-02-29

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 targer line (derived from a method of images for this particular study). From these, wall shapes are calculated that reduce or even 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 means of quite acceptable wall displacements and test section lengths, even for half model testing.

wind tunnel walls
wind tunnels
adaptive Walls wind tunnels
subsonic flow
transonic flow
blocking
semi span models
computational fluid dynamics
three-dimensional flow
aerodynamic interference
panel method (fluid dynamics)
potential flow
test section length
wall displacement
wind tunnel models

http://resolver.tudelft.nl/uuid:3e67e717-45d9-455f-80e8-b7f34e85f6b3

Nationaal Lucht- en Ruimtevaartlaboratorium

Campus only

NLR MP 84018 U

Aerospace Engineering Reports

report

(c) 1984 National Aerospace Laboratory NLR