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 10 of 10 for “"Reynolds number effects"”.
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Reynolds number effects on the aerodynamics of compact axial compressors
… viscous losses and reduced flow turning at low Reynolds numbers ($Re$). In domestic appliance compressors, $Re$ is typically in the range $10^4$ - $10^5$. Although the aerodynamics of isolated aerofoils operating at these $Re$ have been studied extensively, the flow fields within low $Re$ axial …
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Reynolds number effects on the unsteady aerodynamic behavior of an NACA 0012 airfoil
Thesis: M.S., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 1986
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Experimental investigation of the near wall flow structure of a low Reynolds number 3-D turbulent boundary layer
… boundary layers (TBLs) over a range of low Reynolds numbers. The goals of this research were (1) an increased understanding of the flow physics in the near wall region of turbulent boundary layers, (2) to observe and quantify differences between 2-D and 3-D TBL flow structures, and (3) to …
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Unsteady Aerodynamics of Compact Axial Compressors
… domestic appliance industry. The associated low Reynolds number leads to high losses compared to large-scale compressors due to a transitional flow field with large regions of separation. This thesis investigates how Reynolds number variations affect the three-dimensional and unsteady flow field …
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Performance and slipstream characteristics of small-scale propellers at low Reynolds numbers
The low Reynolds number effects of small-scale propellers were investigated. At the Reynolds numbers of interest (below 100,000), a decrease in lift and an increase in drag is common making it difficult to predict propeller performance characteristics. A propeller testing apparatus was built to …
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Effects of axial turbine tip shroud cavity flow on performance and durability
… incurs a penalty associated with cavity flow low Reynolds number effects and induced mismatching between vane and modified tip shroud. In the process of designing this modified tip shroud, it was found that the turbine main flow perceives the cavity as a line sink-source pair, permitting …
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Large Scale Homogeneous Turbulence and Interactions with a Flat-Plate Cascade
… a much needed data-set of much larger Taylor Reynolds number than previous related studies and allowed a thorough investigation of the blade-blocking effects of the cascade on the incident turbulent field. In order to generate the large scale turbulence needed for this study, a mechanically …
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Modeling and validation of a subscale aerobatic aircraft configuration in spin
… configured for this spin research. A large number of spins were flown, and the data were used in the development of the analytical model and 6DOF simulations. Four proposed ventral fin configurations were implemented, and their beneficial effects on the spin and recovery characteristics were …
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Towards a silent fan: an investigation of low-speed fan aeroacoustics
… in buildings or vehicles. The test case fan Reynolds number is of the order of 104 which is a couple of orders lower than those generally found in gas turbines. Its main sources are therefore best identified experimentally in the absence of proven alternative methods. In order to do this, a …
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Experimental wind tunnel study of airfoils with large flap deflections at low Reynolds numbers
… drag, and moment measurements were taken at low Reynolds numbers for four airfoils with trailing edge plain flaps in an attempt to understand the effects of Reynolds number, percent thickness (t/c), percent chord of flap (flap-chord ratio), and flap deflection on airfoil performance. The four …