Heat exchanging hollow passages with helicoidal grooves
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United States of America Patent
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Jun 19, 2012
Grant Date -
Jun 10, 2010
app pub date -
Dec 8, 2008
filing date -
Dec 8, 2008
priority date (Note) -
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Abstract
A hollow passage in a machine element for enhancing the heat exchanging properties between the machine element and a fluid flowing through the hollow passage; the hollow passage including a helicoidal groove. In some embodiments, the machine element comprises a heated machine element and the fluid comprises a coolant. In some embodiments, the machine element comprises a stator blade or a rotor blade of a gas turbine engine and the coolant comprises compressed air. In some embodiments, the helicoidal groove comprises a depression in an outer wall of the hollow passage that extends axially along the hollow passage to form a helicoidal or swirling path.
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