Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Bias Flow"”.
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Acoustic performance of bias flow liners in gas turbine combustors
Der Einsatz moderner Verbrennungskonzepte zur Effizienzsteigerung und Schadstoffreduktion bei Gasturbinen wird oft durch thermo-akustische Instabilitäten verhindert. Durchströmte Brennkammerliner können die akustische Dämpfung des Systems erhöhen und die Instabilitäten unterdrücken. Eine …
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Damping Parameter Study of a Perforated Plate with Bias Flow
… acoustic liners. Recently damping properties of bias flow initially introduced to liners only for cooling purposes have been recognized and proven to be an asset in enhancing the damping effectiveness of liners. Acoustic liners are currently being designed using empirical design rules followed by …
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Experiments and Impedance Modeling of Liners Including The Effect of Bias Flow
… plate acoustic liners including the effect of bias flow was studied. Two impedance models were developed, by modeling the internal flows of perforate orifices as infinite tubes with the inclusion of end corrections to handle finite length effects. These models assumed incompressible and …
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Parametric study and simulation of microbubble column flotation
… by release analysis, provided that a sufficient bias flow was maintained. The test results also demonstrated that various combinations of operating conditions can be utilized to achieve the same level of metallurgical performance. In order to develop an improved understanding of the behavior of …
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Improvement In Acoustic Liner Attenuation In Turbofan Engines By Means Of Plasma Synthetic Jet Actuator
… engine noise. Plasma actuators have been used as flow control devices in other settings and will now be studied as an enhancement for acoustic liners. A plasma actuator can excite oscillatory flow or a single direction (bias flow). Both flow types are studied as possible means to excite turbofan …