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Showing 1 to 5 of 5 for “"Tollmien-Schlichting-Waves"”.
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Characterization and mitigation of blade waviness effects on fan performance
… via geometric resonance between the Tollmien-Schlichting wavelength and the surface wavelength. An effective numerical framework, referred to as the extended eN method, is established to assess the occurrence of the start of transition by tracing the energy transfer from freestream …
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Effect of roughness element on the stability of boundary layers
… results for flat plates. The method accounts for Tollmien-Schlichting waves, the shear layer instability, and their interaction. Separation is found to increase significantly the amplification factor.
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Development and application of transition detection using infrared thermography for characterization of fan blade waviness effects
… transition location based on the growth of Tollmien-Schlichting waves in the boundary layer. Infrared thermography is used to determine the effects of surface waviness on natural transition in the regime of operation of civil aero engine fan blades. Surface waviness on fan blades arises from …
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Investigation of transition to turbulence at low Reynolds numbers using Implicit Large Eddy Simulations with a Discontinuous Galerkin method
… surface over which ow transitions to turbulence. Tollmien-Schlichting waves are observed in the boundary layer upstream of separation, and their streamwise amplification factor shows they are responsible for transition. The major effects of cross-flow on low Reynolds number transition are studied …
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Untersuchungen zum laminar-turbulenten Transitionsprozess bei Anregung und Dämpfung schräglaufender Tollmien-Schlichting-Wellen
… Entwicklung der Instabilitäten, der sogenannten Tollmien-Schlichting Wellen, von deren Schräglaufwinkel zur Plattenvorderkante. Weiterhin wird der Einfluss zahlreicher Parameter wie z.B. des Schalldruckpegels und der Anregungsfrequenz diskutiert. Die Anregung der Tollmien-Schlichting Wellen …