FLOW BENCH

摘要

C-3034 D-2766 A flow bench includes a sealed box with an internal plenum having air flow from a source of pressure directed to several spaced points within the plenum; the sealed box includes an open upper end having a support surface around the open end including undercut spaced parallel grooves at an offset point thereon supporting a pair of seals in sealing engagement with the outer perimeter of a laminated porous panel that completely covers the open end; the flow bench further includes a removable cover including a plurality of dependent pins thereon each with a resilient distal end engageable with the laminated porous panel to prevent buckling across the planar extent thereof and wherein the removable cover includes a peripheral seal plate thereon with an undercut shoulder that accommodates the perimeter of the laminated porous panel and including a groove with a single O-ring therein located above one of the pair of O-ring seals and a plurality of clamp means being provided to bias the seal plate against the outer perimeter of the laminated porous panel to seal the member at the top, bottom and outer surface thereof whereby the air flow through the plenum passes only through the pores of the laminated porous panel thereby to prevent significant sources of error produced by small leakage from other points in the system and wherein means are associated with the fluid flow to the plenum to measure the flow rate through the pores of the laminated porous panel to establish an absolute quantitative measurement of flow rate therethrough for accurately determining the metal cooling properties of the member in a gas turbine engine operating environment.