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Hoover Inc. announced a recall of its Hoover WindTunnel bagless upright vacuums after receiving reports of the machines burning carpets and a consumer's hand, the U.S. Consumer Product Safety ...
This parameter, now known as the Reynolds number, is used in the description of all fluid-flow situations, including the shape of flow patterns, the effectiveness of heat transfers, and the onset of turbulence. This comprises the central scientific justification for the use of models in wind tunnels to simulate real-life phenomena.
The power required to run a supersonic wind tunnel is enormous, of the order of 50 MW per square meter of test section cross-sectional area. For this reason most wind tunnels operate intermittently using energy stored in high-pressure tanks.
Free-jet NASA Glenn Engine Components Research Lab [53] United States NASA Glenn Hypersonic Test Facility [54] Hypersonic United States NASA Glenn Icing Research Tunnel [51] 3 m × 2 m × 6 m (9 ft × 6 ft × 20 ft) Subsonic Icing United States NASA Glenn Propulsion Systems Laboratory [55] Active Diameter 7 m (24 ft) by 12 m (38 ft) long
Hoover Inc. recalled about 142,000 Hoover WindTunnel Canister Vacuums after 69 reports of them overheating or shorting, even when turned off, said the U.S. Consumer Product Safety Commission. ...
16S is a supersonic wind tunnel that can be configured for Mach numbers from 1.5 to 4.750. The test section is also 16-foot-square and 40-foot long. The facility can simulate unit Reynolds numbers from approximately 0.1 to 2.4 million per foot or altitude conditions from 43,000 to 154,000 feet.