The strong multi-longitudinal vortex flow in the AEA-tube is induced by alternating change of the elliptical cross-section, and for the DDIR-tube, the strong multi-longitudinal vortex flow isinduced by the effect of the discrete double-inclined ribs.
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美
- 交叉縮放橢圓管是通過(guò)橢圓截面的交叉變化誘導產(chǎn)生強烈的二次流和多縱向渦流，而不連續雙斜向內肋管則是通過(guò)不連續的雙斜向內肋對的作用形成強烈的多縱向渦。
