Jet akışında lüle çıkış geometrisinin etkisi

Nozzles have a widespread usage in the industrial and daily life. For example, combustion chambers, air conditioning systems, jet engine exhausts are nozzles from which high speed jet flow issues. There are problems with the jet flow as well, such as noise which is a source of noise pollution and mixing problems which results in performance reduction. Solution to these problems is disguised in the flow phenomena. That is why understanding the jet flow and parameters affecting it is an important subject. Through this study, effect of the exit geometry of a nozzle on the flow issuing from it was investigated. Firstly nozzles were designed in the light of past work. Different geometrical aspects were tried to be included in the work. CAD drawings were generated. CFD analyses were conducted on the predetermined nozzle geometries after generating a mesh structure on the measurement volume. Secondly, flow parameters were experimentally measured with the help of an LDA system. LDA system settings were adjusted to have an optimum data rate. Necessary post-processing was conducted and results were compared with the CFD data to validate the CFD methodology. A valid CFD methodology was constructed to be used in further research.