Method and apparatus for determining the relative roughness of h

Details Method and apparatus for determining the relative roughness of h Method and apparatus for determining the relative roughness of h

1975-05-21

1977-06-07

Myracle, Jerry W.

Measuring and testing

With fluid pressure

Dimension, shape, or size

73 379, G01M 1300

Patent

active

040275256

ABSTRACT:
Method and apparatus for determining the machinability and/or the friction factor and relative roughness of holes in solid bodies, particularly of holes in bodies of refractory composition, such as of graphite, are described.
One objective in the design and processing of graphite, such as is used in a nuclear reactor core, is the optimization of the pressure drop through the coolant channels or holes in said core. In many instances, frictional head losses provide the chief contribution to a given pressure drop. Among other objectives, the present invention is designed to permit ready measurement as to when optimization of pressure drop through such holes has been achieved, and to thereby also indirectly provide a means or monitoring device for ascertaining the best drilling parameters and/or processing conditions to be used in producing said graphite core.

REFERENCES:
patent: 2417988 (1947-03-01), Mooney
patent: 3178931 (1965-04-01), Kirk
patent: 3508432 (1970-04-01), Marshall, Jr. et al.
patent: 3838599 (1974-10-01), Purtell

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