| 摘要 |
PURPOSE:To obtain a large amount of fluid flow by small electric power, by flowing fluid in the neighborhood of the center of a pipe, by gathering gas in the neighborhood of the inside wall of a pipe, by applying high voltage across a wire electrode and a mesh electrode. CONSTITUTION:A wire electrode 12 is provided on the inside wall of a pipe 1 along the axial direction of a pipe 1, and a mesh electrode 13 is provided surrounding the outer side of a wire electrode 12. The wire electrode 12 is in no contact with the mesh electrode 13. When high voltage is applied across the wire electrode 12 and the mesh electrode 13, a gas 3 is driven out in the direction of a mesh electrode 13, of which electric field is weaker. The gas 3 gathers in the neighborhood of the inside wall 4 of a pipe 1, while a fluid 2 flows through the part in the neighborhood of the center of a pipe 1. With such an arrangement, the heat transferring rate can be increased in both regions of a foamed gas flow and of a ring fluid flow in a boiling heat exchanger. Since a fluid runs through the region in the neighborhood of the center of a pipe out of two-phases flow in the pipe, pressure loss is lowered, and a large amount of flow can be circulated by small electric power.
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