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 14 of 14 for “"Turbulence Interaction"”.
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On Some Structure-Turbulence Interaction Problems
Made available in DSpace on 2014-12-14T04:42:03Z (GMT). No. of bitstreams: 1 7726709.pdf: 3617591 bytes, checksum: eb7941618761cc0aedb1509c517cd269 (MD5) Previous issue date: 1977
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Turbulence Interaction in a Highly Sataggered Cascade-Propulsor Configuration
… of RDT in predicting the development of turbulence convected through a highly staggered cascade propulsor configuration formed by non-symmetrical airfoils. This present study was possible thank to the support from the Office of Naval Research, in particular Candace Wark and Pat Purtell, …
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Unsteady Turbulence Interaction in a Tip Leakage Flow Downstream of a Simulated Axial Compressor Rotor
… using phase and time averaged 3-component turbulence and pressure fluctuation measurements. These measurements are made for tip gap from 0.83% to 3.3% chord and streamwise locations from 0.772% to 1.117% blade spacing axially downstream of the cascade. The phase averaged inflow measurements …
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Vortex Ring Collision with Free-Slip and No-Slip Wall
… instability, stretching, vorticity and wall turbulence in a simplified way, required in many applications. Present study performs high Reynolds number (2500 and 4000) simulations of vortex rings approaching no-slip and free-slip walls for different radius ratio (0.1, 0.2, 0.3, and 0.4). …
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Mathematical Modelling of Acoustic Diffraction Noise Embracing Diverse Boundary Conditions
… and explore improved models for aerofoil-turbulence interaction noise. The thesis is divided into two parts. The first explores variants of half-plane scattering problems and the analytical requirements for their solutions. The second focuses on applying solutions of these scattering …
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Direct numerical simulation of droplet-laden isotropic turbulence
Interaction of liquid droplets with turbulence is important in numerous applications ranging from rain formation to oil spills to spray combustion. The physical mechanisms of droplet-turbulence interaction are largely unknown, especially when compared to that of solid particles. Compared to solid …
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A qualitative assessment and optimization of URANS modelling for unsteady cavitating flows
… due to its flow unsteadiness and the cavitation-turbulence interaction. One of the principal aspects to modelling cavitation requires the coupling of a cavitation and a turbulence model. While, scale-resolving turbulence modelling techniques like Direct Numerical Simulations (DNS) and Large Eddy …
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Particle Dynamics in Inhomogeneous Flow at Moderate to High Reynolds Number
… detailed microscale information on flow-particle interaction. We address the following sequence of problems. (a) Irrotational flow: We perform DNS of stationary and freely moving particles in straining flows. We show that the spatial nonuniformity in the ambient flow can substantially enhance drag …
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On the interaction of ocean waves and turbulence
The interaction of ocean waves and turbulence is a fundamental process in the ocean. Understanding and prediction of wind-wave generation, propagation, breaking, non-linear interactions and extreme wave development are directly linked to this complex and not well understood phenomenon (Thorpe …
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Assessment of the synoptic variability of the Antarctic marginal ice zone with in Situ observations
… ) products; the ARTIST (Arctic Radiation and Turbulence Interaction STudy) Sea Ice (ASI-AMSR ) and the bootstrap (BST-AMSR ). Theice concentration estimated from these PM satellite products was assessed against SIC observations collected from the S.A. Agulhas II (using the Antarctic Sea Ice …
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Aeroacoustic transfer of leading edge serrations from single aerofoils to low-pressure fan applications
… aeroacoustic potential in reducing aerofoil-turbulence interaction noise and are also associated with certain aerodynamic advantages. To prepare leading edge serrations for industrial application, two obstacles remain to be addressed. First is a combined analysis of the aeroacoustic and the …
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A Theoretical and Numerical Study of Turbulent Wind-Wave Interaction
A deep understanding of turbulent wind-wave interactions is critical for many applications, such as weather modeling in the marine environment, navigation safety of marine vehicles, and offshore wind energy harvesting. The present understanding of the fundamental flow dynamics underlying wind-wave …
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Turbulent partially premixed combustion: DNS analysis and RANS simulation
… physical processes, in particular the scalar-turbulence interaction, the effects of partial premixing on the displacement speed of iso-scalar surface and its correlation with the surface curvature are explored using DNS data. The scalar gradient alignment characteristics change from aligning …
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Comparative Analysis of Serrated Trailing Edge Designs on Idealized Aircraft Engine Fan Blades for Noise Reduction
… These showed that the mean streamwise velocity, turbulence kinetic energy and turbulence kinetic energy production in the tip leakage region were nearly the same for all four serrated blades as well as the baseline. The vorticity in this region was a more dependent on the serration shape and as a …