Method and apparatus for radial exhaust gas turbine

Abstract

A radial exhaust gas turbine apparatus has a gas turbine engine that includes a radial exhaust diffuser section and a casing apparatus consisting essentially of polygonal walls, substantially straight plates, and substantially straight sidewalls. The casing apparatus encloses the radial exhaust diffuser section and is configured to direct at least a substantial portion of the gas exiting the radial exhaust diffuser section to an exit in the casing apparatus via an approximately involute path.

Description

BACKGROUND OF THE INVENTION[0001]The field of the present invention relates generally to gas turbine generators, and more specifically to involute type casings for use with radial exhaust gas turbines.[0002]At least some known gas turbine engines may experience high pressure losses. Such pressure losses may adversely affect engine performance and / or engine efficiency. For example, at least some known radial exhaust gas turbines that include an outer casing may experience high pressure losses in their exhaust diffuser sections. Although circular outer casings can be used to reduce this pressure drop, such casings may be expensive to manufacture, especially for gas turbines that require large size casings.[0003]It would therefore be desirable to provide a more efficient and less expensive casing for use with gas turbines that include a radial exhaust. In particular, it would be desirable to provide a casing that reduces pressure losses in the outer casing section while not being relat...

AI Technical Summary

Benefits of technology

[0007]It will thus be understood that embodiments of involute type casings are formed by joining different straight sections of metal sheets. The arrangement when installed on the radial exhaust gas turbine will reduce the pressure loss in the casing without increasing the cost of manufacturing the casing. The casing will collect the flue gas coming out from vanes and direct the flue gas towards one side. The involute type casing can be manufactured in right handed embodiments or left handed embodiments based upon engineering and installation requirements.

Problems solved by technology

At least some known gas turbine engines may experience high pressure losses.

Such pressure losses may adversely affect engine performance and / or engine efficiency.

For example, at least some known radial exhaust gas turbines that include an outer casing may experience high pressure losses in their exhaust diffuser sections.

Although circular outer casings can be used to reduce this pressure drop, such casings may be expensive to manufacture, especially for gas turbines that require large size casings.

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