Purpose

This study aims to investigate the effects of different surface-to-jet velocity ratios (Rsj) on the flow structure and the heat transfer of the floatation nozzle under different ratios (h/w) of the separation distance (h) to the slot width (w) and the differences of the flow structure and the heat transfer between the floatation nozzle and the slot nozzle.

Design/methodology/approach

The Nusselt number (Nu) and the pressure distribution of the floatation nozzle with a stationary wall are measured. Then the experimental results are used to validate the numerical model. Finally, a series of numerical simulations is carried out to achieve the purpose of this study.

Findings

The flow structure and heat transfer differences between the floatation nozzle and the slot nozzle are clarified. The floatation nozzle has more than 18 times the floatation ability of the unconfined slot nozzle. The Nu and pressure distributions of the floatation nozzle are experimentally measured. The effects of wall motion on the Nu and pressure distributions are identified.

Originality/value

The effects of the wall motion on the flow structure and the heat transfer of the floatation nozzle, and the differences between the floatation nozzle and the slot nozzle are first obtained. Therefore, it is valuable for engineers in engineering design of the floatation nozzle.

中文翻译：

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带有移动壁的浮子喷嘴的流动结构和传热分析

目的

这项研究的目的是研究在分离距离（h）与缝隙宽度之比（h / w）不同的情况下，不同的表面喷射速度比（Rsj）对流动结构和浮嘴传热的影响。（w）以及浮子喷嘴和缝隙喷嘴之间的流动结构和传热的差异。

设计/方法/方法

测量具有固定壁的浮子喷嘴的努塞尔数（Nu）和压力分布。然后将实验结果用于验证数值模型。最后，进行了一系列数值模拟以达到本研究的目的。

发现

澄清了浮嘴和缝隙喷嘴之间的流动结构和传热差异。浮动喷嘴的浮动能力是无限制槽式喷嘴的18倍以上。实验测量了浮选喷嘴的Nu和压力分布。确定了壁运动对Nu和压力分布的影响。

创意/价值

首先获得壁运动对浮子喷嘴的流动结构和传热的影响，以及浮子喷嘴和狭缝喷嘴之间的差异。因此，对于浮头工程设计的工程师具有重要的参考价值。