Abstract:
A seal assembly provided between a hot gas path and a disc cavity in a turbine engine includes an annular outer wing member extending from an axially facing side of a rotor structure toward an adjacent non-rotating vane assembly, and a plurality of fins extending radially inwardly from the outer wing member and extending toward the adjacent non-rotating vane assembly. The fins are arranged such that a space having a component in a circumferential direction is defined between adjacent fins. Rotation of the fins during operation of the engine effects a pumping of purge air from the disc cavity toward the hot gas path to assist in limiting hot working gas leakage from the hot gas path to the disc cavity by forcing the hot working gas away from the seal assembly.
Abstract:
A flow inducing means 110 for use in an anti-icing system for a nose bullet 10 of a gas turbine engine of the type in which hot gas is caused to flow along the center of a rotating tube 7,62 towards the nose bullet 10 to heat it, and cooled air is centrifuged to the surface of the bore of the tube 7,62 and is displaced rearwardly along the tube. The tube 7,62 is open at its rear end, and the flow inducing means 110 is positioned adjacent the open end. The flow inducing means 110 comprises a plurality of radial vanes 111 which enters in a radially inwards direction and the vanes 111 are shaped and positioned to redirect the gas axially along the center of the tube 7. The flow inducer 110 may include a shroud 115 which has a circumferential inlet opening and an axial facing outlet 116. The shroud may serve as a flow separator which separates the incoming hot gas from the cooled gas exiting the tube.
Abstract:
A method and system for creating shear stress and endothelial mechanotransduction through neuromuscular stimulation of the muscle pump. Chronic application a minimum of 30 days triggers the autocrine and paracrine processes which elevates production of vasoactive substances including nitric oxide, prostacyclin, superoxide dismutase, thrombomodulin, glutathion, Krupple-like factor 2 and many others. Chronic application also promotes angiogenesis and development of collateral circulation. This is a cost-effective, non-invasive, drug-free therapy to treat vascular dysfunction and ameliorate or reverse its effects on cardiovascular health.
Abstract:
A method and system for creating shear stress and endothelial mechanotransduction through neuromuscular stimulation of the muscle pump. Chronic application a minimum of 30 days triggers the autocrine and paracrine processes which elevates production of vasoactive substances including nitric oxide, prostacyclin, superoxide dismutase, thrombomodulin, glutathion, Krupple-like factor 2 and many others. Chronic application also promotes angiogenesis and development of collateral circulation. This is a cost-effective, non-invasive, drug-free therapy to treat vascular dysfunction and ameliorate or reverse its effects on cardiovascular health.
Abstract:
A seal assembly provided between a hot gas path and a disc cavity in a turbine engine includes an annular outer wing member extending from an axially facing side of a rotor structure toward an adjacent non-rotating vane assembly, and a plurality of fins extending radially inwardly from the outer wing member and extending toward the adjacent non-rotating vane assembly. The fins are arranged such that a space having a component in a circumferential direction is defined between adjacent fins. Rotation of the fins during operation of the engine effects a pumping of purge air from the disc cavity toward the hot gas path to assist in limiting hot working gas leakage from the hot gas path to the disc cavity by forcing the hot working gas away from the seal assembly.
Abstract:
Compounds of formula (I): ##STR1## wherein R.sup.1 is --CF=CFCF.sub.3 or --CF.sub.2 CF=CFCF.sub.3 are useful in control of cockroaches, ants, fleas, or termites.