FLUID TURBINE WITH EJECTOR SHROUD

摘要

A fluid turbine comprises a turbine shroud and an ejector shroud. The turbine shroud has an axial length LM. The ejector shroud has an axial length LE. The ratio of LM to LE is from 0.05 to 2.5. In particular embodiments, the ejector shroud has an axial length LE, an outer diameter DI at the inlet end, and an outer diameter DE at the exhaust end. The ratio of LE to DI is from 0.05 to 3; and the ratio of LE to DE is from 0.05 to 3. The resulting ejector shroud is 30%-50% shorter than ejector shrouds of previous designs.