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Flow and heat transfer in complex impingement cooling configurations for cooling applications in future gas turbine blades

用于未来燃气轮机叶片冷却应用的复杂冲击冷却配置中的流动和传热

基本信息

批准号：
174897839
负责人：
Professor Dr.-Ing. Jens von Wolfersdorf
金额：
--
依托单位：
Institut für Thermodynamik der Luft- und Raumfahrt (ITLR)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/174897839?language=en
关键词：
Flow heat transfer complex impingement

项目摘要

The research project "Flow and heat transfer in complex impingement cooling configurations for cooling applications in future gas turbine blades" (WO 872/9-1) has been originally proposed for 4 years. The present proposal is dedicated towards the second phase (3rd and 4th year). The project addresses experimental and numerical investigations of flow and heat transfer characteristics in a jet impingement cooling configurations with wall integrated cooling jets focussing on future cooling concepts for gas turbine blades. The focus is on the influence of geometrical constraints and the interaction of different cooling jet rows on fluid flow distributions, mixing behavior and local heat transfer on the walls of such geometries.In the first 2 years, detailed velocity and heat transfer characteristics in a complex constricted impingement situation with wall integrated impingement jets for different flow and thermal conditions were experimentally investigated and corresponding numerical simulations were performed. Local heat transfer distributions were obtained using the transient liquid crystal (TLC) measurement method. Experimental flow measurements were made using Particle Image Velocimetry (PIV). Due to the complementary investgations significant results on the interaction between time-averaged flow and thermal situations have been gained experimentally as well from the interaction between experiments and numerical simulations. Therefrom specific flow structures could well be related to local heat transfer characteristics. However during the course oft he investigations new research topics arose. These relate to methods to manipulate flow and heat transfer in such configurations as well as demands on numerical modelling.These research questions should be addressed in the 2nd project phase using complementary measurement methods, quantifiying flow apprach conditions in more detail and using the open source software OpenFoam for more physically detailed modelling in the numerical simulations. Methods to explore possibilities for heat transfer homogenization will be addressed additionally.

研究项目“用于未来燃气涡轮机叶片冷却应用的复杂冲击冷却配置中的流动和热传递”（WO 872/9-1）最初已经提出了4年。本提案专门针对第二阶段（第三和第四年）。该项目致力于对具有壁面集成冷却射流的射流冲击冷却配置中的流动和传热特性进行实验和数值研究，重点关注燃气涡轮机叶片的未来冷却概念。重点是几何约束和不同冷却射流排的相互作用对流体流动分布、混合行为和这种几何形状的壁面上的局部传热的影响。在头2年，对不同流动和热条件下，壁面集成冲击射流复杂受限冲击工况下的速度和换热特性进行了详细的实验研究，并进行了相应的数值模拟。进行了模拟。局部传热分布得到使用瞬态液晶（TLC）测量方法。使用粒子图像测速法（PIV）进行了实验流量测量。由于互补的调查显着的结果之间的相互作用的时间平均的流动和热的情况下，已经获得了实验以及从实验和数值模拟之间的相互作用。因此，特定的流动结构可以很好地与局部传热特性。然而，在他的调查过程中，新的研究课题出现了。这些研究问题应在项目第二阶段使用补充测量方法、更详细地量化流动接近条件并使用开源软件OpenFoam在数值模拟中进行更详细的物理建模来解决。探索传热均匀化的可能性的方法也将得到解决。