The optimization of corrugation parameters to obtain better thermal-hydraulic performance is the main work of corrugated tube design. In this work, a novel idea is proposed to optimize corrugation parameters based on roughness parameters of skewness (R_sk) and kurtosis (R_ku). For this purpose, the CFD numerical simulation is adopted to study the effects of corrugation width, pitch and depth on flow and heat transfer performance, and the effects of corrugation parameters on R_sk and R_ku are analyzed. The relationship between roughness parameters and thermal-hydraulic performance is discussed. The results indicate that the corrugated tube has better heat transfer performance than that of the smooth tube because of the corrugation induced recirculation flow and improved flow mixing. In addition, the thermal-hydraulic performance enhancement factor (PEC) of corrugated tube is better with the decreasing of R_sk and R_ku. The smaller R_sk and R_ku can be obtained by increasing corrugation width and depth and decreasing corrugation pitch. Hence, the research results initially confirm the feasibility of evaluating the influence of single corrugation parameter on thermal-hydraulic performance based on R_sk and R_ku.

优化波纹参数以获得更好的热工性能是波纹管设计的主要工作。在这项工作中，提出了一种新的思想，即基于偏度（R _sk）和峰度（R _ku）的粗糙度参数来优化波纹参数。为此，采用CFD数值模拟研究了波纹宽度，间距和深度对流动和传热性能的影响，以及波纹参数对R _sk和R _{ku的影响。}被分析。讨论了粗糙度参数与热工液压性能之间的关系。结果表明，由于波纹引起的再循环流和改善的流动混合，波纹管具有比光滑管更好的传热性能。另外，随着R _sk和R _ku的减小，波纹管的热工液压性能提高因子（PEC）更好。较小的R _sk和R _ku可以通过增加波纹宽度和深度以及减小波纹间距来获得。因此，研究结果初步证实了基于R _sk和R _ku评估单个波纹参数对热工液压性能影响的可行性。