The optimization operation has been performed with ANSYS Response Surface Optimization Tool to find optimum channel geometry for converging-diverging channels. Steady state, three dimensional, turbulence, viscous, compressible, single-phase Newtonian flow is assumed through the channel with rectangular cross section. In the study, output parameters have been selected as Colburn factor and Darcy friction factor. Effects of channel width, wavelength and amplitude of converging-diverging channel on output parameters have been examined and non-dimensionless results have been obtained for optimal geometries for three different Reynolds numbers (Re = 4400, 5600 and 6700). To analyze the thermal-hydraulic performance of the optimum wavy channel, thermal performance factors (TPF) are calculated. Results showed that optimized channel is more efficient than straight channel, TPF values for optimized channel were ranged from 1.7 to 1.4 over the range of Re studied.

中文翻译：

---

充分发展的湍流气流中增强对流换热的会聚分流通道的优化设计


使用 ANSYS 响应面优化工具执行优化操作，以找到会聚-分流通道的最佳通道几何形状。假设稳态、三维、湍流、粘性、可压缩、单相牛顿流通过具有矩形横截面的通道。在研究中，输出参数选择为科尔伯恩因子和达西摩擦因子。研究了会聚-发散通道的通道宽度、波长和幅度对输出参数的影响，并获得了三种不同雷诺数（Re = 4400、5600 和 6700）的最佳几何形状的无量纲结果。为了分析最佳波状通道的热工水力性能，计算了热性能因子（TPF）。结果表明，优化通道比直接通道效率更高，在Re研究范围内，优化通道的TPF值在1.7到1.4之间。