초록 ▼

The invention is a method and apparatus for simultaneously detecting laminar separation and reattachment of a fluid stream such as an airstream from and to the upper surface of an airfoil 22 by simultaneously sensing and comparing a plurality of output signals S, each representing the dynamic shear

The invention is a method and apparatus for simultaneously detecting laminar separation and reattachment of a fluid stream such as an airstream from and to the upper surface of an airfoil 22 by simultaneously sensing and comparing a plurality of output signals S, each representing the dynamic shear stress at one of an equal number of sensors 27 spaced along a straight line on the surface of the airfoil 22 that extends parallel to the airstream. The output signals S are simultaneously compared to detect the sensors across which a reversal in phase of said output signal S occurs, said detected sensors being in the region of laminar separation or reattachment.

대표청구항 ▼

A method of detecting laminar separation of a fluid stream relative to a surface therein comprising the steps of: simultaneously sensing the fluctuating dynamic shear stress with a plurality of sensors spaced along a straight line on said surface; simultaneously generating a plurality of output sign

A method of detecting laminar separation of a fluid stream relative to a surface therein comprising the steps of: simultaneously sensing the fluctuating dynamic shear stress with a plurality of sensors spaced along a straight line on said surface; simultaneously generating a plurality of output signals from said sensors representative of the fluctuating dynamic shear stress along said straight line; and simultaneously comparing all of said output signals to detect a first point along said straight line at which said output signals reverse in phase, said first point of reversal in phase indicating a laminar separation of said fluid stream from said surface.