Row of long and short chord length and high and low...

Details Row of long and short chord length and high and low... Row of long and short chord length and high and low...

2006-08-22

2006-08-22

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Plural distributing means immediately upstream of runner

C415S195000, C416S175000, C416S24100B

Reexamination Certificate

active

07094027

ABSTRACT:
A gas turbine engine turbine stage has an annular row of turbine airfoils including a first plurality of first airfoils having a first chord length and a second plurality of second airfoils having a second chord length shorter than the first chord length. At least one of the second airfoils is circumferentially disposed between each adjacent pair of the first airfoils. A second leading edges of the second airfoils are located downstream of first leading edges of the first airfoils. The first and second airfoils have different first and second temperature capabilities respectively and the first temperature capability is greater than the second temperature capability. The first and second airfoils may be made from different alloys and/or the second airfoils may be constructed to use lower amounts of cooling airflow than the first airfoils. More than one of the second airfoils may be disposed between each pair of the first airfoils.

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Shackleford et al., CRC Materials Science and Engineering Handbook, 1994, CRC Press, Second Edition, pp. 262-263.

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