Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Patent
1982-06-22
1984-07-31
Marcus, Stephen
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
416 95, 416 96R, 415115, 415116, 415117, F01D 508
Patent
active
044627548
ABSTRACT:
The blade has an aerofoil portion (16) having a first (23), a second (24), a third (25) and a fourth (26) internal spanwise passage for cooling air arranged in chordwise succession with the first passage being at the leading edge wall (17) of the blade. The first and third passages are connected to respective a cooling air supplies (14A,14B) at the root end (11) of the blade. At the tip (28) of the blade the third passage is connected to the second passage to introduce air, warmed on passing through the third passage, into the second passage and ameliorate undue cooling of the internal walls (19,20) between the first, second and third passages. The third passage is also connected to the fourth passage for supply of cooling air to the trailing region of the blade. The second passage has outlets (24A) to the exterior of the blade whereby the flow through the second passage is controllable independently of the air supply to the fourth passage, i.e. to the trailing region of the blade.
REFERENCES:
patent: 3045965 (1962-07-01), Bowmer
patent: 3807892 (1974-04-01), Frei et al.
patent: 4136516 (1979-01-01), Corsmeier
patent: 4177010 (1979-12-01), Greaves et al.
patent: 4302153 (1981-11-01), Tubbs
patent: 4326833 (1982-04-01), Zelahy et al.
John Kwon
Marcus Stephen
Rolls Royce Limited
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