Currently the junior research group is engaged in the improvement of the understanding the gap flow of variable stator vanes in a high-pressure compressor and the bleed air taken from the stage, as it appears in gas turbines for cooling the turbine and for supplying of the secondary air system with compressed air. The related project in cooperation with Rolls Royce Germany is engaged in the integration of new concepts to the removal of bleed air in gas turbines. CFD simulations for the assessment of the aerodynamics properties as well as the experimental investigation of different geometries in a wind tunnel and a low-speed-axial compressor (LSRC) are conducted. The main goal is to extend the understanding of the main formation of the gap flow of variable stators in combination with improved gap flow removal geometry on variable operating points and develop a better design process to improve the overall efficiency for design and part load.
Another project alongside the interpretation of new parts is the operational wear of gas turbines and its components and parts. During operational use, an aircraft engine wears out. This reduces the performance of the engine and thus the efficiency. Periodic maintenance of the engine can partially reverse the closure. Maintenance tailored to the engine requires models that can predict the performance of an engine within an operating cycle, depending on the mission. Therefor an understanding of the essential mechanisms of action is necessary. The IFAS specifically investigates the fouling of the compressor. Fouling refers to the deposition of small (~ 2 - 10 µm) particles (eg smoke, oil or salt) from the ambient air on the compressor blades. The deposits increase the surface roughness of the blades and change their geometry. To investigate fouling, representative fouling topology blade geometries are created and studied both experimentally and numerically. For this purpose, stationary measurements are carried out on the cascade wind tunnel. The findings are then further investigated for transferability for transient flows at the LSRC. Finally, the results of individual stages are to be scaled to the entire compressor.
Projects:
BMWI LuFo V - „ProTherm“ Prognose der thermodynamischen Alterung von Flugtriebwerken unter Betriebsbedingungen, AP 1.2 Verdichter – Fouling. In cooperation with Lufthansa Technik, ANSYS Germany und DLR. runtime: 01.01.2018-31.03.2021
BMWI AG Turbo ECOFLEX 1.1.2 „Verbundvorhaben: Flex_Verdi – Flexible Verdichter; Teilvorhaben: Seitenwandströmungen von Statoren bei radial umverteilter Kanalströmung“ In cooperation with Rolls Royce Deutschland. runtime: 01.09.2018-31.08.2022
BMVI: Nationales Innovationsprogramm Wasserstoff- und Brennstoffzellentechnologie (NIP) Verbundvorhaben „ARIEL: Aufladung für Brennstoffzellensysteme durch interdisziplinär entwickelte Elektrische Luftverdichter“; Teilvorhaben: „Multidisziplinäre Systembetrachtung eines elektrischen Luftverdichters“ In cooperation with VW Salzgitter, Ostfalia Wolfenbüttel, TFD of LUH, iMAB, iAF and the IWF of the TUBS. runtime: 01.06.2019-31.10.2021
EXC SE²A: “ICA - Multidisciplinary design of shape adaptive compressor blading” runtime: 01.01.2019-31.12.2022