ASE 120K - Report Template

ASE 120K - Report Template - Flow Around a Sphere Drew...

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Flow Around a Sphere Drew Rosecrans, DCR544 ASE – 120K Low-Speed Aerodynamics Laboratory The University of Texas at Austin Department of Aerospace Engineering and Engineering Mechanics Spring, 2010
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TABLE OF CONTENTS ABSTRACT page # INTRODUCTION page # page # page # page # APPENDICES page # REFERENCES page #
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Flow was examined in the basement of the W. R. Woolrich building at the University of Texas at Austin. In the flow about a 21.59cm diameter sphere in the wind tunnel, five different Reynolds numbers varying from Re=1.820*10 5 to Re= 3.572*10 5 were used to look at the pressure distributions and pressure drag with the varying Re numbers. The pressure distributions were acquired by putting pressure taps at 10 0 intervals around the vertical diameter of the sphere. The Cp was then used to calculate the pressure drag at the different Reynolds numbers. It was observed that as the C D decreased, the flow moved from the sub-critical range, to the super- critical range. The flow was observed making these changes by the various visualization techniques of a hot wire, a smoke wand, tufts, and a stethoscope. The C D was comparably accurate to that of the Hoerner’s presentation of typical experimental results of C D as a function of Reynolds number. In the water tunnel the boundary layer profile was examined using a Laser Doppler Anemometer about a 13.3cm diameter glass sphere at a tunnel velocity of .2538 m/s and was found to be consistent. The flow visualization of separation and vortices were observed at a tunnel velocity of .1161 m/s using dye injected at the front of the sphere. A condensed summary of the document (in about five to ten sentences) of what was investigated and the results found. It must be independent of the rest of the document. You should focus on giving a short description of the problem, the solution and the major results. In some instances, this may include a physical number such as a drag coefficient. In other instances, this may
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This note was uploaded on 09/18/2011 for the course ASE 120K taught by Professor Staff during the Spring '10 term at University of Texas.

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ASE 120K - Report Template - Flow Around a Sphere Drew...

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