Experimental measurement of viscous drag is done on a rotating disc using a disc spin-down experiment in various air pressures ranging from atmospheric pressure through a vacuum pressure of 0.3 kPa. The torque is non-dimensionalized using the dynamic viscosity of air, angular velocity, and the characteristic dimension of the disc. The results can be classified as two different sets. Between atmospheric pressure and 13.3 kPa, the curves have a vertical downward trend and are connected to each other while at lower pressures the curves appear to be more horizontal. It is shown that the present experimental setup is an improvement over the old setup because the frictional torque associated with the experiment has been reduced by 25 % approximately, and the ambient pressure reached in the chamber is a fourth of the ultimate pressure reached before.
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ASME 2013 International Mechanical Engineering Congress and Exposition
November 15–21, 2013
San Diego, California, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-5631-4
PROCEEDINGS PAPER
Experimental Characterization of Flow Regimes for a Rotating Disc Over a Range of Gas Pressures
Tathagata Acharya,
Tathagata Acharya
Louisiana State University, Baton Rouge, LA
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Jordan Falgoust,
Jordan Falgoust
Louisiana State University, Baton Rouge, LA
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Michael J. Martin,
Michael J. Martin
Louisiana State University, Baton Rouge, LA
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Richard E. Rasmussen
Richard E. Rasmussen
Guidance Dynamics Corporation, Simi Valley, CA
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Tathagata Acharya
Louisiana State University, Baton Rouge, LA
Jordan Falgoust
Louisiana State University, Baton Rouge, LA
Michael J. Martin
Louisiana State University, Baton Rouge, LA
Richard E. Rasmussen
Guidance Dynamics Corporation, Simi Valley, CA
Paper No:
IMECE2013-63014, V07AT08A015; 7 pages
Published Online:
April 2, 2014
Citation
Acharya, T, Falgoust, J, Martin, MJ, & Rasmussen, RE. "Experimental Characterization of Flow Regimes for a Rotating Disc Over a Range of Gas Pressures." Proceedings of the ASME 2013 International Mechanical Engineering Congress and Exposition. Volume 7A: Fluids Engineering Systems and Technologies. San Diego, California, USA. November 15–21, 2013. V07AT08A015. ASME. https://doi.org/10.1115/IMECE2013-63014
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