0414 Investigation of flow properties of viscoelastic fluids in complex flow fields with elongation and shear.

A method to visualize and characterize the complex flow fields in simulated brush seals is presented. The brush seal configuration was tested in a water and then in an oil tunnel. The visualization procedure revealed typical regions that are rivering, jetting, vortical or lateral flows and exist upstream, downstream or within the seal. Such flows are engendered by variations in fiber void that are spatial and temporal and affect changes in seal leakage and stability. While the effects of interface motion for linear or cylindrical configurations have not been considered herein, it is believed that the observed flow fields characterize flow phenomenology in both circular and linear brush seals. The axial pressure profiles upstream, across and downstream of the brush in the oil tunnel have been measured under a variety of inlet pressure conditions and the ensuing pressure maps are presented and discussed.

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Data acquisition and control system for on-line measurement and analysis of complex flow fields

2010 International Conference on Intelligent and Advanced Systems ◽

10.1109/icias.2010.5716184 ◽

2010 ◽

Author(s):

H H Al-Kayiem

Keyword(s):

Control System ◽

Data Acquisition ◽

Flow Fields ◽

Complex Flow ◽

Line Measurement ◽

Measurement And Analysis ◽

On Line ◽

And Control

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Flow Field Analysis of Under-Expanded Supersonic Jets Impinging on an Inclined Flat Plate: Analysis With PSP/Schlieren Images and CFD Simulations

Volume 1: Symposia, Parts A and B ◽

10.1115/fedsm2005-77226 ◽

2005 ◽

Cited By ~ 1

Author(s):

Kozo Fujii ◽

Akira Oyama ◽

Nobuyuki Tsuboi ◽

Moto Tsukada ◽

Hirofumi Ouchi ◽

...

Keyword(s):

Flat Plate ◽

Flow Structure ◽

Pressure Ratio ◽

Three Dimensional ◽

Flow Fields ◽

Field Analysis ◽

Geometrical Parameters ◽

Complex Flow ◽

Plate Analysis ◽

Complex Flow Structure

Flow fields of Mach number 2.2 jet impinging on an inclined flat plate are experimentally investigated using the Pressure Sensitive Paints (PSP) and Schlieren flow visualization. The flow filed structure is mainly determined by two geometrical parameters (nozzle-plate distance and plate angle against the jet) and one flow parameter (pressure ratio). The results suggest that all the observed flow fields can actually be classified into three types of flow structure based on the three parameters above. As an extension of the authors’ earlier work, experiments are carried out for higher plate angles. The new results show the effectiveness and limitation of the classification that we proposed. To find out the flow structure, some of the flow fields are computationally simulated. Good agreement of the pressure distributions with the experiment validates the simulation. Although analysis so far is limited, the result reveals three dimensional complex flow structure that created pressure peaks over the plate surface.

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