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Showing 1 to 20 of 68 for “"Separated Flow"”.
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Turbulent Separated Flow Over Wavy Surfaces
An experimental investigation of separated flow over wavy surfaces is presented in which laser-Doppler velocimetry is demonstrated to be a useful technique for velocity and turbulence data acquisition. Time-averaged velocity, turbulent intensity, skewness, and flatness data are given.
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A potential flow model for separated flow around airfoils
… been done on the wake source model, a potential flow model for steady separated flow. This work includes some modifications to the model and applications to new geometries. In the wake source model, the body of interest is conformally mapped to a circle. In the transform plane, singularities …
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Transient state analysis of separated flow around a sphere
… Stokes equation was obtained for incompressible flow around a sphere accelerating from zero initial velocity to its terminal free falling velocity. By assuming rotational symmetry around the axis in the falling direction, the Navier Stokes equation and the continuity equation were simplified in …
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Sturcture of Three-Dimensional Separated Flow on Symmetric Bumps
Surface mean pressures, oil flow visualization, and 3-velocity-component laser-Doppler velocimeter measurements are presented for a turbulent boundary layer of momentum thickness Reynolds number, 7300 and thickness delta over two circular based axisymmetric bumps of height H = delta and 2delta and …
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Active Control of Separated Flow over a Circular-Arc Airfoil
An experimental study of active control of fully separated flow over a symmetrical circular-arc airfoil at high angles of attack was performed. The experiments were carried out in a low-speed, open circuit wind tunnel. Angles of attack from 10 to 40 degrees were tested. Low-power input, unsteady …
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Fluid-structure interaction of a cantilevered plate in supersonic separated flow
… FSI of a cantilevered plate geometry in Mach 2 flow. The geometry of interest, representative of a compliant control surface, consists of an overhanging plate that extends past the edge of a backward-facing step to create a separated region in the supersonic flow. This setup allows for the study …
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Investigation of Separated Flow Model in Annular Gas-Liquid Two-Phase Flows
Made available in DSpace on 2017-07-06T18:38:05Z (GMT). No. of bitstreams: 2 Dallman_John_C_PhD.pdf: 93542237 bytes, checksum: 4fa2fa5c801b1e30b5a3a310ff9a3fde (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1978
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The analysis of partially separated flow on sail systems using a sectional method
… are subjected to low speed and transitional flow. Because of the<br/>supporting structure (mast and boom) of the sail system and the curvature of sail<br/>membrane, sail systems also have a partially separated flow.<br/><br/>In this work, it is introduced the sectional method as a sail system …
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Thermal Adjustment of Separated Flow to Transient External Flow Conditions in Short Duration Experiments
Made available in DSpace on 2014-12-09T17:13:28Z (GMT). No. of bitstreams: 1 6406017.pdf: 2982334 bytes, checksum: 408edf109dcd30d6cb37acd85b2afbd1 (MD5) Previous issue date: 1963
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Implementation of a separated flow panel method for wall effects on finite swept wings
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
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Wind-Induced Pressures in Air Permeable, Double-Layer Roof Systems in Regions of Separated Flow
… the pressure drops associated with the flow through the gaps between panels, which is like an orifice flow, and the cavity flow between parallel plates. Thus, the model uses two primary equations: the unsteady discharge equation and the equation for unsteady flow between two parallel …
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Development and Application of Particle Image Velocimetry in High-Speed Separated Flow: Two-Dimensional Base Cavities
… velocity data over a planar region in high-speed separated flows for the quantitative analysis of turbulent and unsteady flow structures. This PIV system is the first of its type to incorporate sub-micron seed particles and birefringent image shifting for the resolution of flow velocity in …
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Empirical mode decomposition applied to planar and volumetric velocity field measurements of a supersonic separated flow
The supersonic separated flowfield aft of a blunt-faced cylinder aligned with the freestream is highly complex such that a technique able to identify instantaneous turbulent structure within it is valuable. In this study, multi-dimensional extensions of fast and adaptive empirical mode …
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A semi-implicit Navier-Stokes solver and its application to a study of separated flow about blunt delta wings
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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A numerical simulation of two-dimensional separated flow in a symmetric open-channel expansion using the depth-integrated two-equation (K-E) turbulence closure model
Many of the free surface flow problems encountered by hydraulic engineers can be suitably analyzed by means of the depth-integrated equations of motion. A consequence of adopting a depth-integrated modeling approach is that closure approximations must be implemented to represent the so-called …
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Application of the vortex-lattice concept to flows with smooth- surface separation
… vortex-lattice method which treats the steady separated flow over prolate bodies with open separation moving through an inviscid incompressible fluid is developed. The strength and position of the body wake are found as part of the solution. Specifically, flows with smooth-surface separation …
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Theoretical Studies in Two-Phase Flow Prior to the Transition to Detonation in Granular Solid Propellants
A model describing reactive two-phase flow through a gas-solid mixture is presented based upon either the concept of continuum mixture or the concept of separated-flow continuum. The resulting governing equations are solved by the method of finite differences. Details of two distinct numerical …
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Steady and unsteady cascade measurements
… angles of attack. Laser-doppler velocimetry and flow visualization were used. A method was developed for inducing propagating stall and some triggered ensemble averaged velocity records were obtained. An inviscid model was developed in order to predict the separated flow over an isolated blade. …
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Investigation and Simulation of Ion Flow Control over a Flat Plate and Compressor Cascade
An investigation of ion flow control was performed to determine the effect of a positive, DC corona discharge on the boundary layer profile along a flat plate and to examine its ability to prevent separated flow in a low-speed compressor cascade. Flat plate tests were performed for two electrode …
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