主权项 |
1. Wave fins comprising:
a plurality of hills, a plurality of valleys and a plurality of sidewalls, wherein the plurality of hills and the plurality of valleys being connected to each other via the plurality of sidewalls, and the plurality of sidewalls partition a plurality of fluid passages between the plurality of hills and the plurality of valleys through which fluid passes, wherein the plurality of hills, the plurality of valleys and the plurality of sidewalls form main waveforms that extend in a longitudinal direction, the main waveforms extending so as to be waved in a first radius of curvature, and wherein one or more bent portions are formed on intermediate portions of the main waveforms, the bent portions being connected to remaining portions of the main waveforms so as to be bent at a second radius of curvature. |