Erno Raumfahrttechnik Gmbh

Klaus P Nickel

Bernhard Leidinger

Ruediger Meyer

A heat pipe is divided longitudinally by a divider wall into a vapor channel and into a liquid channel. The divider wall is provided, preferably at uniform axial spacings with bulges that form a restriction in the flow cross-sectional area of the vapor channel and an increase in the flow cross-sectional area of the liquid channel. A small diameter through bore is positioned at the peak of each bulge to connect the liquid channel with the vapor channel at this point. The reduced pressure at the restriction in the vapor channel is sufficient to suck gas or vapor bubbles collected under the bulge into the vapor channel, but insufficient to pull liquid into the vapor channel. The cross-sectional flow area of the liquid channel increases steadily toward each bulge, either from a point centrally between two bulges or from a point directly downstream of a bulge toward the next bulge as viewed in the flow direction of the liquid.

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Bremen, Germany

Klaus P Nickel