Detailed Flow-field Measurements Over a 75 Degrees Swept Delta Wing PDF Download
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Author: Scott O. Kjelgaard
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Author: Scott O. Kjelgaard
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722155445
Category :
Languages : en
Pages : 46
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Book Description
Results from an experimental investigation documenting the flowfield over a 75 deg swept delta wing at an angle-of-attack of 20.5 deg are presented. Results obtained include surface flow visualization, off-body flow visualization, and detailed flowfield surveys for various Reynolds numbers. Flowfield surveys at Reynolds numbers of 0.5, 1.0, and 1.5 million based on the root chord were conducted with both a Pitot pressure probe and a 5-hole pressure probe; and 3-component laser velocimeter surveys were conducted at a Reynolds number of 1.0 million. The Pitot pressure surveys were obtained at 5 chordwise stations, the 5-hole probe surveys were obtained at 3 chordwise stations and the laser velocimeter surveys were obtained at one station. The results confirm the classical roll up of the flow into a pair of primary vortices over the delta wing. The velocity measurements indicate that Reynolds number has little effect on the global structure of the flowfield for the Reynolds number range investigated. Measurements of the non-dimensional axial velocity in the core of the vortex indicate a jet like flow with values greater than twice freestream. Comparisons between velocity measurements from the 5-hole pressure probe and the laser velocimeter indicate that the pressure probe does a reasonable job of measuring the flowfield quantities where the velocity gradients in the flowfield are low. Kjelgaard, Scott O. and Sellers, William L., III Langley Research Center RTOP 505-60-11-03...
Author: Scott O. Kjelgaard
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Scott O. Kjelgaard
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 52
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Linda G. Smith
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 120
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Book Description
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.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 464
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 134
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 122
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 440
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