航空科学技术2025，Vol.36Issue(7)：34-40,7.DOI:10.19452/j.issn1007-5453.2025.07.005
直通道阻塞比对流动与传热特性数值模拟研究
Numerical Simulation Study on Flow and Heat Transfer Characteristics of Straight Channel Turbulence Rib Blockage Ratio
摘要
Abstract
In order to further improve the heat transfer performance of the cooling channel of aircraft engine turbine blades,this paper focuses on the influence of the blockage ratio of the turbulence ribs in the cooling channel on flow and heat transfer.This paper uses a structured hexahedral mesh and a k-ε turbulence model to solve the three-dimensional N-S equation,and conducts numerical simulation research on the flow and heat transfer characteristics of straight turbulent fins with different blockage ratios inside a straight cold channel.It also analyzed the influence of cooling channels on fluid flow and heat transfer in the region between fins under different blockage ratios,and analyzed the flow and heat transfer of channels in ribbed areas with different blockage ratios of fins.The results show that within the range of numerical simulation,the overall heat transfer efficiency of the channel increases first and then decreases with the increase of blockage ratio.When the blockage ratio is 0.05 and the ratio of rib spacing to rib height is 9,the overall heat transfer efficiency of the channel is optimal.The comprehensive heat transfer efficiency decreases with the increase of blockage ratio,and the best comprehensive heat transfer effect is achieved when the blockage ratio is 0.025 and the ratio of rib spacing to rib height is 12;When the blockage ratio is 0.025 and the ratio of rib spacing to rib height is 5,the local heat transfer effect of the ribs is optimal;The channel flow resistance loss increases with the increase of blockage ratio.When the blockage ratio is 0.0875 and the ratio of rib spacing to rib height is 12,the flow resistance loss is the largest,and the influence of flow resistance loss on the comprehensive heat transfer efficiency dominates.Starting from the perspective of the blockage ratio of turbulence ribs,this paper determines the optimal arrangement of turbulence ribs,providing an effective design basis for the application of turbulence ribs in turbine blade cooling channels.关键词
扰流肋/阻塞比/肋高/传热特性/流动特性Key words
turbulence rib/blockage ratio/rib height/heat transfer characteristics/flow characteristic分类
航空航天引用本文复制引用
徐建新,冯宏远..直通道阻塞比对流动与传热特性数值模拟研究[J].航空科学技术,2025,36(7):34-40,7.
