Abstract: A new special channel named as double wavy channel is presented. Based on the method of orthogonal experiments, 9 double wavy channels with different structural parameters were designed. In certain Reynolds number range (25≤Re≤200), the characteristics of fully developed laminar flow and heat transfer for the 9 double wavy channels were considered using computational fluid dynamics technology. The fluid flow experimental set for the channel was designed and manufactured, and flow velocities of special points in the channel were measured using laser Doppler velocimeter. It is concluded that the wave amplitude of the channel has significant effect on the characteristics. The numerical simulation results are in accordance with the experimental results and the maximum relative error of the main velocity is 28.7%. The validity and accuracy of the numerical simulation are verified.

Key words: computational fluid dynamics, laminar flow, heat transfer, double wavy channel, orthogonal experiment, laser Doppler velocimeter

摘要： 开发了一种双波纹流道结构，基于正交实验方法设计了9组不同结构参数的双波纹流道，采用计算流体力学（CFD）方法，研究了一定Reynolds数范围内（25≤Re≤200），9组双波纹流道内的流体充分发展层流流动和传热性能。研究结果表明，流道的波纹波幅对于流体流动和传热性能的影响较大。设计制作了流体在双波纹流道中流动的冷模实验装置，采用激光多普勒测速仪（LDV）对于流道内特殊位置点的速度进行测量，将实验测量结果与数值模拟计算结果进行对比。结果表明，实验测量结果与数值模拟计算结果变化趋势一致且吻合较好，主流速度的最大相对误差为28.7%，由此验证了数值模拟计算的可靠性和准确度。

关键词: 计算流体力学, 层流, 传热, 双波纹流道, 正交实验, 激光多普勒测速仪