| 摘要: |
| 传统管壳式油冷却器的传热效率较低，且存在壳程流动死区及易结垢等缺点。本文采用新型三叶形扭曲膨胀管技术提高传统油冷器的传热。通过实验测试平台测试得到的三叶形扭曲膨胀管油冷器传热及压降数据，与光滑圆管油冷器、传统翅片管油冷器和花瓣状翅片管油冷器进行对比分析。研究结果表明，采用三叶形扭曲膨胀管技术能明显提高油冷器传热系数，但比外翅片管油冷器压降更高，在较低雷诺数下，三叶形扭曲膨胀管油冷器综合性能比翅片管油冷器差，而随雷诺数增加，其综合性能逐渐优于外翅片管油冷器，具有很好的推广应用前景。 |
| 关键词: 油冷器 三叶管 强化传热 综合性能 |
| DOI： |
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| 基金项目: |
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| Experimental Analysis of Oil Cooler Based on Trefoil Screwed Expansion Pipe |
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Huang Yuanyuan, Zhou Guoyan, Qian Tailei, An Dongxu, Yang Liu, Zhu Dongsheng
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| (School of Mechanical and Power Engineering, East China University of Science and Technology, Key Laboratory of Pressure Systems and Safety of Ministry of Education) |
| Abstract: |
| The traditional oil cooler with smooth tube has low heat transfer coefficient and dead zone in shell side flow, and it easily produces dirt. The trefoil screwed expansion pipe is used to enhance the heat transfer of the traditional oil cooler. The heat transfer and pressure drop of the oil cooler with trefoil screwed expansion tube were tested in an experimental system and compared with oil cooler with smooth tube and oil cooler with outer finned tube respectively. The result shows that the oil cooler with trefoil screwed expansion tube improves heat transfer coefficient more significantly compared with oil cooler with outer finned tube, but is accompanied by a higher pressure drop. With Reynolds number increasing, the comprehensive performance of oil cooler with trefoil screwed expansion tube is better gradually than the oil cooler with outer finned tube , which means that oil cooler with trefoil screwed expansion tube has good application prospect. |
| Key words: oil cooler trefoil pipe heat transfer enhancement comprehensive performance |
