Laser Velocimetry Measurements of Vortex Flows on a Delta Wing at Mach 1.9

Laser Velocimetry Measurements of Vortex Flows on a Delta Wing at Mach 1.9

Author: Linda G. Smith

Publisher:

Published: 1993

Total Pages: 120

ISBN-13:

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Off-body flow visualizations and fluid velocity measurements are conducted in a supersonic vortex flow. Three-dimensional laser velocimetry measurements are made in the leeward flowfield over a simple sharp-edged delta wing with 75 degree sweep angle. Tests are conducted at Mach 1.9 and Reynolds number of 2.4 x 10(exp 6) based on model root chord. Measurements are made at 40% and 80% chord positions for 20 and 30 degree angles of attack and at 40% chord for 35 degrees. Mean velocities and turbulence intensities are measured on the five planes. Measurement accuracy is discussed in detail. The measurements define the location of the vortex core and provide the flowfield velocities surrounding the vortex. The difficulties inherent with seeding high velocity vortex flows are discussed ... Laser Velocimetry Measurement of Vortical Flowfields.


Book Synopsis Laser Velocimetry Measurements of Vortex Flows on a Delta Wing at Mach 1.9 by : Linda G. Smith

Download or read book Laser Velocimetry Measurements of Vortex Flows on a Delta Wing at Mach 1.9 written by Linda G. Smith and published by . This book was released on 1993 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Off-body flow visualizations and fluid velocity measurements are conducted in a supersonic vortex flow. Three-dimensional laser velocimetry measurements are made in the leeward flowfield over a simple sharp-edged delta wing with 75 degree sweep angle. Tests are conducted at Mach 1.9 and Reynolds number of 2.4 x 10(exp 6) based on model root chord. Measurements are made at 40% and 80% chord positions for 20 and 30 degree angles of attack and at 40% chord for 35 degrees. Mean velocities and turbulence intensities are measured on the five planes. Measurement accuracy is discussed in detail. The measurements define the location of the vortex core and provide the flowfield velocities surrounding the vortex. The difficulties inherent with seeding high velocity vortex flows are discussed ... Laser Velocimetry Measurement of Vortical Flowfields.

Laser Velocimetry Measurements of Vortex Flows on a Delta Wing at Mach 1.9

Laser Velocimetry Measurements of Vortex Flows on a Delta Wing at Mach 1.9

Author:

Publisher:

Published: 1993

Total Pages: 0

ISBN-13:

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Off-body flow visualizations and fluid velocity measurements are conducted in a supersonic vortex flow. Three-dimensional laser velocimetry measurements are made in the leeward flowfield over a simple sharp-edged delta wing with 75 degree sweep angle. Tests are conducted at Mach 1.9 and Reynolds number of 2.4 x 10(exp 6) based on model root chord. Measurements are made at 40% and 80% chord positions for 20 and 30 degree angles of attack and at 40% chord for 35 degrees. Mean velocities and turbulence intensities are measured on the five planes. Measurement accuracy is discussed in detail. The measurements define the location of the vortex core and provide the flowfield velocities surrounding the vortex. The difficulties inherent with seeding high velocity vortex flows are discussed ... Laser Velocimetry Measurement of Vortical Flowfields.


Book Synopsis Laser Velocimetry Measurements of Vortex Flows on a Delta Wing at Mach 1.9 by :

Download or read book Laser Velocimetry Measurements of Vortex Flows on a Delta Wing at Mach 1.9 written by and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Off-body flow visualizations and fluid velocity measurements are conducted in a supersonic vortex flow. Three-dimensional laser velocimetry measurements are made in the leeward flowfield over a simple sharp-edged delta wing with 75 degree sweep angle. Tests are conducted at Mach 1.9 and Reynolds number of 2.4 x 10(exp 6) based on model root chord. Measurements are made at 40% and 80% chord positions for 20 and 30 degree angles of attack and at 40% chord for 35 degrees. Mean velocities and turbulence intensities are measured on the five planes. Measurement accuracy is discussed in detail. The measurements define the location of the vortex core and provide the flowfield velocities surrounding the vortex. The difficulties inherent with seeding high velocity vortex flows are discussed ... Laser Velocimetry Measurement of Vortical Flowfields.

Laser Velocimetry in Fluid Mechanics

Laser Velocimetry in Fluid Mechanics

Author: Alain Boutier

Publisher: John Wiley & Sons

Published: 2013-01-09

Total Pages: 436

ISBN-13: 1118569334

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In fluid mechanics, velocity measurement is fundamental in order to improve the behavior knowledge of the flow. Velocity maps help us to understand the mean flow structure and its fluctuations, in order to further validate codes. Laser velocimetry is an optical technique for velocity measurements; it is based on light scattering by tiny particles assumed to follow the flow, which allows the local fluid flow velocity and its fluctuations to be determined. It is a widely used non-intrusive technique to measure velocities in fluid flows, either locally or in a map. This book presents the various techniques of laser velocimetry, as well as their specific qualities: local measurements or in plane maps, mean or instantaneous values, 3D measurements. Flow seeding with particles is described with currently used products, as well as the appropriate aerosol generators. Post-processing of data allows us to extract synthetic information from measurements and to perform comparisons with results issued from CFD codes. The principles and characteristics of the different available techniques, all based on the scattering of light by tiny particles embedded in the flow, are described in detail; showing how they deliver different information, either locally or in a map, mean values and turbulence characteristics.


Book Synopsis Laser Velocimetry in Fluid Mechanics by : Alain Boutier

Download or read book Laser Velocimetry in Fluid Mechanics written by Alain Boutier and published by John Wiley & Sons. This book was released on 2013-01-09 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: In fluid mechanics, velocity measurement is fundamental in order to improve the behavior knowledge of the flow. Velocity maps help us to understand the mean flow structure and its fluctuations, in order to further validate codes. Laser velocimetry is an optical technique for velocity measurements; it is based on light scattering by tiny particles assumed to follow the flow, which allows the local fluid flow velocity and its fluctuations to be determined. It is a widely used non-intrusive technique to measure velocities in fluid flows, either locally or in a map. This book presents the various techniques of laser velocimetry, as well as their specific qualities: local measurements or in plane maps, mean or instantaneous values, 3D measurements. Flow seeding with particles is described with currently used products, as well as the appropriate aerosol generators. Post-processing of data allows us to extract synthetic information from measurements and to perform comparisons with results issued from CFD codes. The principles and characteristics of the different available techniques, all based on the scattering of light by tiny particles embedded in the flow, are described in detail; showing how they deliver different information, either locally or in a map, mean values and turbulence characteristics.

Laser Velocimetry Measurementsof Supersonic Vortex Flows on a Simple Razor-edged Delta Wing

Laser Velocimetry Measurementsof Supersonic Vortex Flows on a Simple Razor-edged Delta Wing

Author: Linda G. Smith

Publisher:

Published: 1991

Total Pages:

ISBN-13:

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Book Synopsis Laser Velocimetry Measurementsof Supersonic Vortex Flows on a Simple Razor-edged Delta Wing by : Linda G. Smith

Download or read book Laser Velocimetry Measurementsof Supersonic Vortex Flows on a Simple Razor-edged Delta Wing written by Linda G. Smith and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Measurement of Vortex Breakdown Over a Delta Wing Using a Laser Anemometer

Measurement of Vortex Breakdown Over a Delta Wing Using a Laser Anemometer

Author:

Publisher:

Published: 1974

Total Pages: 46

ISBN-13:

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Book Synopsis Measurement of Vortex Breakdown Over a Delta Wing Using a Laser Anemometer by :

Download or read book Measurement of Vortex Breakdown Over a Delta Wing Using a Laser Anemometer written by and published by . This book was released on 1974 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Detailed Flow-field Measurements Over a 75 ̊swept Delta Wing

Detailed Flow-field Measurements Over a 75 ̊swept Delta Wing

Author: Scott O. Kjelgaard

Publisher:

Published: 1990

Total Pages: 52

ISBN-13:

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Book Synopsis Detailed Flow-field Measurements Over a 75 ̊swept Delta Wing by : Scott O. Kjelgaard

Download or read book Detailed Flow-field Measurements Over a 75 ̊swept Delta Wing written by Scott O. Kjelgaard and published by . This book was released on 1990 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Three Component Doppler Global Velocimeter Measurements of the Flow Above a Delta Wing

Three Component Doppler Global Velocimeter Measurements of the Flow Above a Delta Wing

Author: James F. Meyers

Publisher:

Published: 1992

Total Pages: 6

ISBN-13:

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A new measurement technique is being developed by NASA to measure off-surface flow fields. This method, Doppler global velocimetry, will allow qualification of complex three-dimensional flow fields at video camera rates. The entire flow field structure within a selected plane is measured simultaneously rather than by scanned, point-by-point measurements using conventional laser velocimetry. To assess the capability of this new technique, three component velocity measurements of the vortical flow field above a thin 75 degree delta wing were made in the NASA Langley Basic Aerodynamics Research Tunnel. Measurements were made of the flow field at the 70-percent chord locations at angles-of-attack of 20.5-and 40.0-degrees to investigate unburst and burst vortices. For comparison, previous fringe-type laser velocimeter measurements of the flow field at the same conditions are included.


Book Synopsis Three Component Doppler Global Velocimeter Measurements of the Flow Above a Delta Wing by : James F. Meyers

Download or read book Three Component Doppler Global Velocimeter Measurements of the Flow Above a Delta Wing written by James F. Meyers and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new measurement technique is being developed by NASA to measure off-surface flow fields. This method, Doppler global velocimetry, will allow qualification of complex three-dimensional flow fields at video camera rates. The entire flow field structure within a selected plane is measured simultaneously rather than by scanned, point-by-point measurements using conventional laser velocimetry. To assess the capability of this new technique, three component velocity measurements of the vortical flow field above a thin 75 degree delta wing were made in the NASA Langley Basic Aerodynamics Research Tunnel. Measurements were made of the flow field at the 70-percent chord locations at angles-of-attack of 20.5-and 40.0-degrees to investigate unburst and burst vortices. For comparison, previous fringe-type laser velocimeter measurements of the flow field at the same conditions are included.

Laser Velocimetry Study of Compressibility Effects on the Flow Field of a Delta Wing

Laser Velocimetry Study of Compressibility Effects on the Flow Field of a Delta Wing

Author: G. Vorropoulos

Publisher:

Published: 1983

Total Pages: 13

ISBN-13:

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Compressibility effects on the lee-side vortical flow field of a delta wing at incidence were studied using laser doppler velocimetry. The tests covered the Mach number range from 0.18 to 0.80; both axial and circumferential velocity components were measured. It was found that the axial velocity excess observed at low Mach numbers became an axial velocity deficit at Mach numbers above 0.6. Strong asymmetry was observed in the circumferential velocity distribution at the higher Mach numbers. A flow picture including an embedded shock wave is proposed as physical explanation of the observed compressibility effects. (Author).


Book Synopsis Laser Velocimetry Study of Compressibility Effects on the Flow Field of a Delta Wing by : G. Vorropoulos

Download or read book Laser Velocimetry Study of Compressibility Effects on the Flow Field of a Delta Wing written by G. Vorropoulos and published by . This book was released on 1983 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compressibility effects on the lee-side vortical flow field of a delta wing at incidence were studied using laser doppler velocimetry. The tests covered the Mach number range from 0.18 to 0.80; both axial and circumferential velocity components were measured. It was found that the axial velocity excess observed at low Mach numbers became an axial velocity deficit at Mach numbers above 0.6. Strong asymmetry was observed in the circumferential velocity distribution at the higher Mach numbers. A flow picture including an embedded shock wave is proposed as physical explanation of the observed compressibility effects. (Author).

Flow Field Over the Wing of a Delta-wing Fighter Model with Vortex Control Devices at Mach 0.6 to 1.2

Flow Field Over the Wing of a Delta-wing Fighter Model with Vortex Control Devices at Mach 0.6 to 1.2

Author: E. Ann Bare

Publisher:

Published: 1992

Total Pages: 146

ISBN-13:

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Book Synopsis Flow Field Over the Wing of a Delta-wing Fighter Model with Vortex Control Devices at Mach 0.6 to 1.2 by : E. Ann Bare

Download or read book Flow Field Over the Wing of a Delta-wing Fighter Model with Vortex Control Devices at Mach 0.6 to 1.2 written by E. Ann Bare and published by . This book was released on 1992 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Application of Laser Doppler Velocimetry to Trailing Vortex Definition and Alleviation

The Application of Laser Doppler Velocimetry to Trailing Vortex Definition and Alleviation

Author:

Publisher:

Published: 1973

Total Pages: 40

ISBN-13:

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Book Synopsis The Application of Laser Doppler Velocimetry to Trailing Vortex Definition and Alleviation by :

Download or read book The Application of Laser Doppler Velocimetry to Trailing Vortex Definition and Alleviation written by and published by . This book was released on 1973 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: