Effusion cooling
Effusion cooling describes a cooling technique that is used in the aerospace industry to cool the combustion chamber and the turbine blades directly behind the combustion chamber. This cooling technique is carried out at high temperatures of about 1800 K used. The cooling takes place here using a cooling gas that flows through a porous wall and heats up in the process. The gas flowing into the combustion chamber is diverted by the hot gas in the exit direction of the combustion chamber, with a cooling film being formed between the combustion chamber wall and the hot gas. The cooling film adsorbs heat and transports it away in the direction of flow.
A porous material can be used as the wall surface, but it is susceptible to being laid by dirt particles. A perforated plate is also possible. These metal components are made from high temperature alloys .
literature
- Willy JG Bräunling : Basics, aero-thermodynamics, ideal and real cycle processes, thermal turbo machines, components, emissions and systems. Springer, Berlin 2009, ISBN 3-540-76368-6 .