HEAT-TUBE COOLING CIRCUIT OF TURBINE BLADE Russian patent published in 2014 - IPC F01D5/18 

FIELD: heating.

SUBSTANCE: heat-tube cooling circuit of a turbine includes at least one cooling cavity located in radial direction between the shank and the end face of the blade and connected to an air supply cavity and outlet holes, the walls of which are provided with hemispherical cavities arranged in a staggered order. Hemispherical cavities of opposite walls of the cooling cavity are located opposite each other, and upper and lower hemispheres of bispherical heat tubes are located in them. Each bispherical heat tube consists of upper and lower spheres. Spheres are made from heat-resistant material with high thermal conductivity and connected to each other through a hole, in which a transport wick is passed. The wick is made from porous material and adjoins opposite sections of inner surfaces of upper and lower spheres of a bispherical heat tube, which are covered with a grid made of porous material strips. Lower and upper hemispheres of upper and lower bispherical heat tubes are located in the cooling cavity. Pores of porous material of the wick and the grid are filled with working liquid.

EFFECT: invention is aimed at improvement of efficiency of a heat-tube cooling circuit of the turbine blade.

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