椭圆管壳管式换热器传热性能的实验研究  

Experimental study on heat transfer performance of a shell and tube heat exchanger with elliptical tubes

作　　者：张如意 潘昆 齐佳伟 焦鹏程 张云飞[2] 柏立战[2] ZHANG Ruyi;PAN Kun;QI Jiawei;JIAO Pengcheng;ZHANG Yunfei;BAI Lizhan(Institution of Heat Exchanger Technology,AVIC Xinxiang Aviation Industry(Group)Co.,Ltd.,Xinxiang 453049,China;School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]航空工业新乡航空工业(集团)有限公司热交换器研究所,河南新乡453049 [2]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《沈阳航空航天大学学报》2023年第5期9-16,共8页Journal of Shenyang Aerospace University

基　　金：国家自然科学基金(项目编号:51776012)。

摘　　要：为了确保滑油的润滑效果,对滑油进行高效冷却使其处于适宜的温度范围,提升燃滑油换热器的传热性能,满足航空发动机对其性能的更高要求。基于椭圆管良好的换热及流动特性和小管径椭圆异形管技术,设计开发一种椭圆管壳管式燃滑油换热器,并搭建实验平台,对其传热与流阻特性开展全面的实验研究,并同常规的圆管壳管式换热器进行比较分析。实验获得了椭圆管壳管式换热器传热量以及流阻随流量的变化规律。实验结果表明,在实验工况范围内,相比常规的圆管壳管式换热器,椭圆管壳管式换热器传热量最高可提升15.6%;同时,壳管式换热器壳侧流动阻力明显降低,最大降幅达23.2%,而管侧流动阻力变化很小。以基准圆管换热器为标准,椭圆管壳管式换热器的PEC指数在管外侧流量大于20 L/min时稳定在1.2~1.4区间内,证明该换热器达到提高综合换热性能的目的,在航空发动机高效燃滑油换热领域具有广阔应用前景。In order to ensure the lubrication effect of the lubricating oil,the lubricating oil was cooled efficiently to make it in a suitable temperature range,improve the heat transfer performance of the fuel oil heat exchanger,and meet the higher performance requirements of the aero-engine.Based on the ex-cellent heat transfer and flow characteristics of the elliptical tube and the technology of small diameter elliptical-shaped tubes,a shell and tube heat exchanger was designed and developed with elliptical tubes and built an experimental platform to carry out comprehensive experimental researches on its heat transfer and flow resistance characteristics,lastly compared and analyzed it with conventional shell and tube heat exchangers with circular tubes.The variation law of heat transfer and flow character-istics with the flow rate of the shell and tube heat exchanger with elliptical tubes were obtained experi-mentally.The experimental results show that in the range of the experimental conditions,compared with the conventional shell and tube heat exchanger with circular tubes,the heat transfer of the shell and tube heat exchanger with elliptical tubes can be increased by 15.6%at most;meantime,the shell side flow resistance of shell and tube heat exchangers decreases significantly,with a maximum reduc-tion of 23.2%,while the change in flow resistance on the tube side is small.Taking the conventional shell and tube heat exchanger with circular tubes as the standard,the PEC index of the shell and tube heat exchanger with elliptical tubes is stable in the range of 1.2~1.4 when the flow rate at the tube’s outside is greater than 20 L/min,which proves that the heat exchanger has achieved the purpose of im-proving the comprehensive heat exchange performance,and has a broad application prospect in the field of efficient fuel oil heat exchange in aero-engines.

关 键 词：航空发动机 换热器 椭圆管 传热 流阻 壳管式换热器 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]