The high-pressure (HP) turbine and compressor blades are subjected to severe aero-thermal loads either caused by high inlet temperature resulting from the combustion chamber or by the shock wave at the blade surface. In this paper, a partitioned conjugate heat transfer (CHT) approach is used to assess 3D cases with high temperature gradient. On one...
This article reviews the modeling challenges for performing Large Eddy Simulations of aero-nautical combustion chambers. Since the kerosene is injected in a liquid phase into the combustion chamber, the description of the atomization is of primary importance. The article first discusses the numerous numerical challenges encountered during this proc...
Auf Grundlage der Ergebnisse einer Literaturrecherche wird ein neues Vormischerkonzept entwickelt, mit dem Ziel einen moeglichst hohen Vorverdampfungsgrad zu erreichen. Mit verschiedenen konventionellen und optischen Messtechniken werden das globale Betriebsverhalten und das reagierende Stroemungsgeld bei atmosphaerischen und realistischen Betriebs...
Germany
Germany
Germany
Demands on modern gas turbine systems are high efficiency and low emissions. Due to that nearly all gas turbine systems use piloted premixed combustion. Modeling of combustion processes withComputational Flow Dynamics CFD suffers from the complexity of combustion chemistry. The direct application of kinetics leads to hugh and stiff differential equ...
The project had two main fields of emphasis: 1. Description of a low-particle combustion process without exhaust recirculation. 2. Reduction of NOx emissions by exhaust recirculation. A one-cylinder aggregate was used for both functions, and the following influencing parameters were investigated: Compression ration, combustion chamber geometry, hyd...
1. Increasing combustion chamber temperatures and more compact combustion chambers have resulted in vibration problems of gas turbines. Thermoacoustic instabilities led to inferior safety, performance and emission ratings. The underlying mechanism is not fully explored and understood. 2. The performance of a swirl-stabilized natural gas premix burn...
Germany
