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Showing 1 to 13 of 13 for “"shear stress measurements"”.
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Development of a MEMS Sensor for sub-kPa Shear Stress Measurements
… sensors for measuring sub-kPa (<1000Pa) wall shear stresses in high-speed turbulent flows. Wall shear stress is an important flow quantity that is used to characterize flows that can be found in aerospace, automotive, and biomedical applications. Sensors that can measure this quantity could …
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Particle-wall shear stress measurements within the standpipe of a circulating fluidized bed
… could be due to forces such as particle-wall shear stress.;In this research the one-dimensional gas-solids mixture momentum balance is applied to the standpipe. Neglecting acceleration effects, the important forces are the gas and solids phase pressure drop, weight of the bed, and the …
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Silicon micromachined sensors and sensor arrays for shear-stress measurements in aerodynamic flows
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
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Part I--Mean and fluctuating wall shear stress measurements ; Part II--Fluid-loaded elastic slab undergoing line and point load excitations
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1993.
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Robust control of non-linear 2D and linear 3D disturbances in channel flow by surface transpiration
… through wall-normal transcription and point wall-shear-stress measurements. The transcription is applied in both continuous harmonic form and a system based on discrete zero-net-mass-flux panel-pair form. For 2D flow it is demonstrated by means of a spectral Galerkin solver, that a simple …
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Development of a direct-force-reading, thin-film shear stress gage
… metal film mounted flush to the wall surface. Shear forces acting on the thin-film surface cause strain concentrations to develop in the attachment tabs where strain sensors are located. The shear forces are related to the differential output of the strain sensors located on each of the …
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Mean velocity and turbulence measurements of flow around a 6:1 prolate spheroid
… along the leeward side. Mean velocity flow field measurements, at α = 10∘ and 15∘ , and at Re = 1.3 x 10⁶ (U<sub>re</sub>= 15.2 mls) and 4.0x 10⁶ (Ure=45.7 m/s), were obtained at four axial locations along the afterbody. Boundary layer profiles and Reynolds shear stress measurements were obtained …
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Boundary Shear Stress Along Vegetated Streambanks
… the effects of riparian vegetation on boundary shear stress (BSS) by completing the following objectives: (1) evaluating the effects of streambank vegetation on near-bank velocity and turbulence; (2) determining a method for measuring BSS; and, (3) examining the effects of streambank vegetation …
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Endwall Heat Transfer and Shear Stress for a Nozzle Guide Vane with Fillets and a Leakage Interface
… wind tunnel with the same vane geometry. Endwall shear stress measurements were obtained for various endwall-airfoil junction geometries without upstream leakage flow. Endwall heat transfer and cooling effectiveness were measured for various leakage flow rates and leakage gap widths, with a …
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Direct numerical investigation and reduced-order modeling of 3-D honeycomb acoustic liners
… with acoustic excitation and that facesheet shear stress measurements, while dominant at low acoustic amplitudes, contribute less at higher acoustic amplitudes. The DNS data further show that the orifice discharge coefficient can be semi-empirically modeled effectively using an …
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Active control of supersonic boundary layers using electric arc plasma actuators
… pulse on the boundary layer was studied. Voltage measurements were obtained, which showed that the voltage required for the trigger breakdown was about 3.4 kV, and the arc-sustaining circuit was charged to a potential of 565 V. These measurements also showed that the timing and consistency of the …
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Air slide basic modelling
… have an impact on segregation. Fluidization and shearing trials have been conducted both on alumina and binary mixtures in order to establish a benchmark procedure for powder characterisation that could be used as an operational support tool. Currently the minimum fluidization velocity for all …
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The effects of micro-vortex generators on normal shock wave/boundary layer interactions
… streamwise vortices. High-speed pressure measurements also indicated that the vortex generators shift the energy of the pressure fluctuations to higher frequencies. Implementation of micro-vortex generators into a large-scale, supersonic, axisymmetric, relaxed-compression inlet have been …