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 9 of 9 for “"inflow turbulence"”.
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Frequency Effect on Peak Pressure Coefficients Using the Narrowband Synthesis Random Flow Generator (NSRFG) Method
… (NSRFG) method is used to calculate the inflow turbulence. The behavior of the pressure and the velocity at the building location in the computational domain without building using the NSRFG inflow turbulence method is also investigated. The number of segments of the wind spectrum (N) is …
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A Numerical and Experimental Evaluation of the Turbulent Heat Flux in a Heated Jet in Crossflow
… is developed and applied in which tube and duct turbulence inflow effects are emulated using a divergence-free synthetic eddy method (SEM). The LES sensitivity to the synthetic inflow turbulence is examined with a series of simulations with the SEM inflow toggled on and off. The effects of …
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Large eddy simulation of supersonic combustion with application to scramjet engines
… are shown to be sensitive to the nature of turbulence at the inflow; however this information can be experimentally obtained. The SCHOLAR test case is used to validate the reacting aspects of PULSAR. Comparing RANS results from laminar chemistry and assumed PDF combustion model simulations, …
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The Effects of Free Stream Turbulence on the Flow Field through a Compressor Cascade
… made to reveal the effects of grid generated turbulence on this flow. The data set is unique in that not only does it give a comparison of elevated free stream turbulence effects, but also documents the developing flow through the blade row of a compressor cascade with tip leakage. …
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Towards Predictive Eddy Resolving Simulations for Gas Turbine Compressors
… (SGS) model, and the correct specification of inflow turbulence is examined. The sensitivity of LES to the numerical scheme is explored using the Taylor-Green vortex test case. The numerical smoothing, controlled by a user defined smoothing constant, is found to be important. To avoid tuning …
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The Space-time Structure of an Axisymmetric Turbulent Boundary Layer Ingested by a Rotor
… applications, urban air-transportation and turbulence ingestion noise. The combined effect of lateral curvature and streamwise pressure gradient are examined on the mean flow, turbulence structure, velocity correlations and wall pressure fluctuations. Additionally, the upstream influence of …
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Towards a silent fan: an investigation of low-speed fan aeroacoustics
… produces tones due to very high sensitivity to inflow distortion of the mean flow (giving unsteady blade loading). This means that the product inlet must be designed very carefully to optimally condition the flow. Periodicity in the impeller outlet flow produces rotor-stator interaction tones …
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An Experimental Investigation of Unsteady Surface Pressure on Single and Multiple Airfoils
… of measurements made on an airfoil immersed in turbulence and comparisons with inviscid theory are presented with the goal of determining the effect of angle of attack on an airfoils inviscid response. Unsteady measurements made on the surface of a linear cascade immersed in periodic flow are …
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Unsteady separation control on wind turbine blades
… in wind turbine operating environments, such as inflow turbulence, wind gusts and sustained yaw misalignment. The unsteady separation due to dynamic stall can lead to excessive loads, much larger than the design loads for the turbine, and vibrations in the blade, leading to fatigue damage. …