W-1B Facility Description
Studies conducted in W-1B assist in the developing of CFD methods to aid in design and analysis of aircraft propulsion components and systems. The source of air in W-1B orignates in the test cell entering the rig through a conical screen or it flows through a pressurized inlet tied to the 40-psig central system, providing higher Reynolds number test capability. Inlet air is drawn into an eight-foot diameter plenum tank to condition the air entering the test section. A system can provide desired levels to turburlence, flow angularity and boundary layer profile, as well as, create swirlflow conditions. The tunnel flow is regulated from 0 to 4 pps and 4 to 25 pps by a 4" valve and 12" valve, respectively and has a si channel blowing/bleeding system. Both valves are equipped with electronic controllers. The air is driven through the facility by the sub-atmospheric (alitiude) exhaust.

W-1B Special Features
Detailed measurements of total and static pressure and three components of velocity are typically taken at nearly 2000 locations from the inlet to the exit of the diffuser. Also, surface flow patterns are photographed by using a fluorescent-oil dye and an ultraviolet light for illumination. Data acquisition is handled through electronically scanned pressure (ESP) and PACS systems linked to an ESCORT processing system.