Experimental investigations for lifetime prediction (D09)

为了提高对喷嘴寿命的了解，TP D9将利用在第二FP中开发的试验台进行可靠的实验，创新的测量包括热气流，定义结构表面的热通量，喷嘴结构，与热气体和冷却剂流动的相互作用，以及冷却管道内的流动，对来自金属壁面的热量进行对流。现在的工作重点是将燃烧压力提高一倍，以达到显著更高的热通量。分析了表面粗糙度对换热(热气和冷却管侧)的影响。最后，热障涂层的应用将显示出损伤防护方面的改进。

To improve the understanding of the nozzle lifetime TP D9 will exploit the test stands developed in the 2nd FP for reliable experiments with innovative measuring comprising the hot gas flow, defining the heat flux to the structural surface, the nozzle structure, interacting with hot gas and coolant flow, and the flow inside the cooling ducts, convecting the heat from the metallic walls. A focus of work is now a doubling of the com-bustion pressure, to reach significantly higher heat fluxes. The influence of the surface roughness on heat transfer (hot gas and cooling duct side) will be analyzed. Finally, the application of thermal barrier coatings will show the improvement regarding damage protection.