Method of producing a heat transfer tube for single-phase flow

Details Method of producing a heat transfer tube for single-phase flow Method of producing a heat transfer tube for single-phase flow

1986-12-23

1989-01-03

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

With tool surface orbiting around axis parallel to direction...

291573H, B21D 5306

Patent

active

047947756

ABSTRACT:
A method for producing a heat transfer tube for single-phase flow having rows of discontinuous projections formed on the inner surface thereof along one or more spiral curves. Each projection has a circular, elliptic or a similar cross-section constituted by smooth curves at any desired height including the bottom thereof. The cross-sectional area of the projection progressively decreases towards the top of the projection.

REFERENCES:
patent: 3387477 (1968-06-01), Shupper
patent: 4451966 (1984-06-01), Lee

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