Numerical Investigation of Flow and Heat Transfer in Vane Impingement/Effusion Cooling with Various Rib/Dimple Structure
作者机构：School of Power and EnergyNorthwestern Polytechnical UniversityXi’an710129China
出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)
年 卷 期：2023年第32卷第4期
页 面：1357-1377页
核心收录：
学科分类：080701[工学-工程热物理] 080704[工学-流体机械及工程] 080103[工学-流体力学] 082502[工学-航空宇航推进理论与工程] 08[工学] 0807[工学-动力工程及工程热物理] 0825[工学-航空宇航科学与技术] 0801[工学-力学（可授工学、理学学位）]
主 题：conjugate heat transfer impingement cooling dimple V-shape rib discharge coefficient
摘 要：By investigating heat transfer and flow structures of dimples,orthogonal ribs,and V-shaped ribs in the impingement/effusion cooling,the article is dedicated to selecting a best-performing internal cooling structure for a turbine *** overall cooling effectiveness and coolant consumption are adopted to evaluate the cooling *** analyze the influence of structural modification,the flow field is investigated on chordwise/spanwise sections and the target *** blockage effect on crossflow can protect jet flow,resulting in higher heat transfer performance of the target *** own a stronger blockage effect than *** with the blockage effect,the influence of the rib shape is *** installing dimples between ribs,heat transfer is augmented *** introduction of ribs/dimples leads to higher discharge coefficients of jet nozzles but lower discharge coefficients of film ***,the film cooling ***,the installation of the ribs and dimples decreases total coolant *** effect of ribs/dimples on heat transfer and effusion condition of internal and external cooling is *** best-performing cooling structure is the target surface with dimples and orthogonal ribs,which decreases the wall temperature and coolant consumption by 14.57-28.03 K and 1.19%-1.81%*** article concludes the flow mechanism for dimples and influence factors on the cooling performance,which may serve as guidance for the turbine vane design.
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