扩散焊混合式换热器热工性能试验研究  

Study on the thermal performance test of diffusion‑bonded hybrid heat exchangers

作　　者：于改革 陈永东 韩冰川 刘孝根 YU Gaige;CHEN Yongdong;HAN Bingchuan;LIU Xiaogen(Hefei General Machinery Research Institute Co.,Ltd.,Hefei 230031,China)

机构地区：[1]合肥通用机械研究院有限公司,合肥230031

出　　处：《流体机械》2025年第3期1-8,88,共9页Fluid Machinery

基　　金：安徽省重点研究和开发计划基础领域项目(2023Z04020020);国机集团青年科技基金重点项目(QNJJ-ZD-2022-06)。

摘　　要：为了研究扩散焊混合式换热器热工性能,基于风洞试验平台开展了扩散焊混合式换热器传热与流动性能试验,并与数值仿真结果进行对比,分析了不同方法获取的传热因子和摩擦因子准则方程对不锈钢平直翅片的适应性。结果表明,扩散焊混合式换热器热负荷随空气侧流速增大而增大,阻力损失增加更为显著,当空气侧流速从8.1 m/s增加至28.2 m/s,热负荷增加了2.9倍,阻力损失增加了9.82倍;在空气侧2 440≤Re≤8 502范围内,基于统计方法获取的传热因子准则方程计算获得的热负荷与数值仿真、试验结果三者之间偏差为0.34%~16.55%,阻力损失理论计算与试验测值偏差均小于3%。试验验证了传热因子、摩擦因子准则方程及数值仿真的模型准确可靠。研究结果可用于指导单相工质扩散焊混合式换热器的热工设计。This study investigates the thermal performance of diffusion‑bonded hybrid heat exchangers through wind tunnel experiments and numerical simulations.Comparative analysis was conducted on the adaptability of heat transfer and friction factor correlations obtained by different methods for stainless steel plain fins.Results indicate that the thermal load of the heat exchanger increases with rising air‑side velocity,while the pressure loss grows more significantly.When air velocity increases from 8.1 m/s to 28.2 m/s,the thermal load increases by 2.9 times,and the pressure loss escalates by 9.82 times.Within the air‑side Reynolds number range of 2440≤Re≤8502,the theoretical thermal load calculated using statistically derived Colburn factor correlations deviates by 0.34%~16.55%from numerical and experimental results.Theoretical pressure loss predictions show less than 3%deviation from measured values.The study verifies the accuracy of the heat transfer/friction factor correlations and numerical models,providing practical guidance for thermal design of single‑phase diffusion‑bonded hybrid heat exchangers.

关 键 词：扩散焊 混合式换热器 板翅 zig-zag通道 

分 类 号：TK172[动力工程及工程热物理—热能工程]