Flow directing element for the turbine of a rotary machine and m

Details Flow directing element for the turbine of a rotary machine and m Flow directing element for the turbine of a rotary machine and m

1991-01-11

1993-05-11

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Irregular, flanged or channel forming blade surface

416241R, 415914, F01D 514

Patent

active

052096440

ABSTRACT:
A flow directing element (such as a rotor blade 34 or a stator vane 44) for the turbine section 16 of a rotary machine is disclosed. Various construction details are developed which increase the aerodynamic efficiency of the flow directing element. In one embodiment, the flow directing element is a rotor blade 34 having a roughened surface which approximates the critical roughness characteristic of the airfoil. In one particular embodiment, the roughness average of the surface lies between 120 to 200 AA microinches.

REFERENCES:
patent: 1903823 (1928-12-01), Lougheed
patent: 4428213 (1984-01-01), Neal et al.
patent: 4846629 (1989-07-01), Takigawa
patent: 4859150 (1989-08-01), Takigawa
patent: 4869644 (1989-09-01), Takigawa
patent: 4900230 (1990-02-01), Patel
Van Dyke "An Album of Fluid Motion" (p. 26).
Broadston "Surface-Texture Designation, Production, and Control" pp. 13-75-13-81.

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