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Abstract
The edge tone flow is one of the most simple aero-acoustic flow formulation. Despite it has been researched for several decades it is not yet fully understood. The flow consists of a planar free jet and a wedge shaped object placed oppositely to the jet. Under certain circumstances the jet starts to oscillate as it impinges on the wedge. The jet can take different shapes, these are called the stages of the edge tone. As the main parameters of the configuration varies the frequency of oscillation changes continuously within each stage. At some points the jet jumps between stages making a sudden jump in the frequency of oscillation as well. Also it was found that at certain parameters the jet jumps between stages without any change in the conditions. This study throws light on some very interesting non-linear phenomena according to the stage jumps of the edge tone. Both experimental and numerical techniques were used during the research.
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