In the present study, the characteristics of a representative advanced rotational hydrodynamic cavitation reactor (ARHCR) in pilot scale were experimentally investigated. The cavitation generation mechanism was analyzed with respects to experimental flow visualization. The variation regularity of the thermal performance under a full range of operational conditions (i.e., various rotational speeds (2600 to 4200 rpm) and flow rates (1 to 2.6 m/h)) was analyzed by establishing polynomial model and response surface. A critical flow rate of 1.2 (≤2800 rpm) or 1.4 m/h (>2800 rpm) was found out for the present ARHCR for the first time, the thermal performance can be greatly enhanced when the critical flow rate was reached. The achieved heat generation rate and thermal efficiency can be as high as 57.21 MJ/h and 79.99%, respectively. The effects of the operational conditions on the thermal performance were evaluated and discussed. Finally, the thermal and disinfection performance of the present ARHCR was compared with that of previous devices. The ARHCR achieved a disinfection rate of 100% for with an expense of $2.72/m at the optimal condition. The disinfection result indicated that the treatment rate of the present ARHCR was approximately 140 times higher than that of the recently reported ARHCR, with 50 times lower expenses. The findings of this work can strongly contribute to the fundamental understanding, design, and application of ARHCRs in water treatment.

中文翻译：

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先进旋转水力空化反应器水处理特性研究


在本研究中，对具有代表性的中试规模先进旋转水力空化反应器（ARHCR）的特性进行了实验研究。通过实验流动可视化分析了空化产生机制。通过建立多项式模型和响应面，分析了全范围工况（即各种转速（2600~4200 rpm）和流量（1~2.6 m/h））下热性能的变化规律。首次发现现有ARHCR的临界流量为1.2（≤2800 rpm）或1.4 m/h（>2800 rpm），达到临界流量后热性能可大大提高。实现的发热率和热效率分别高达57.21 MJ/h和79.99%。评估并讨论了操作条件对热性能的影响。最后，将当前 ARHCR 的热和消毒性能与以前的设备进行了比较。在最佳条件下，ARHCR 的消毒率达到 100%，成本为 2.72 美元/平方米。消毒结果表明，目前ARHCR的治疗率比最近报道的ARHCR高约140倍，而费用却低50倍。这项工作的结果可以极大地促进 ARHCR 在水处理中的基本理解、设计和应用。