Development an Experimental Method to Investigate Hydrodynamic Drag
Development an Experimental Method to Investigate Hydrodynamic Drag
Newcastle University [UNEW] has enhanced the test section of their existing water channel facility. The new measurement section is utilized to measure pressure drop (and hence frictional drag) across a standard flat test panel (length=0.6 m; width=0.22 m). The panel can be tested as cleanly coated as well as exposed to light biofilm growth. Based on measured pressure gradients, the skin friction coefficients of these surfaces are calculated and compared with other well-established methods (i.e., measuring the boundary layer of similar surfaces using a [LDV] system in UNEW’s Emerson Cavitation Tunnel [ECT], to evaluate the pressure drop methodology. This paper presents a design and calibration of a flow cell to investigate skin-friction of three different surfaces in a fully developed turbulent flow.
Keywords:
Biofouling Drag, Flow cell, Roughness,
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- Banerjee, I., Pangule, R. C., & Kane, R. S. (2011). Antifouling coatings: Recent developments in the design of surfaces that prevent fouling by proteins, bacteria, and marine organisms. Advanced Materials, 23(6), 690–718.
- Candries, M. (2001). Drag, boundary layer and roughness characteristics of marine surfaces coated with antifoulings [Unpublished Doctoral Dissertation]. Newcastle University.
- Dean, R. B. (1978). Reynolds number dependence of skin friction and other bulk flow variables in two-dimensional rectangular duct flow. Journal of Fluids Engineering, 100(2), 215–223.
- Harvald, S. A. (1983). Resistance and propulsion of ships. John Wiley & Sons.
- Monty, J. P. (2005). Developments in smooth wall turbulent duct flows [Unpublished Doctoral Dissertation]. University of Melbourne, Department of Mechanical and Manufacturing Engineering.
- Nikuradse, J. (1933). Laws of flow in rough pipes. VDI Forschungsheft.
- Politis, G., Atlar, M., Kidd, B., & Stenson, P. (2013, September 7-8). A multipurpose flume for the evaluation of hull coatings. 3rd International Conference on Advanced Model Measurement Technology for the Maritimae Industry (AMT’13), Gdansk, Poland.
- Schultz, M. P., Bendick, J. A., Holm, E. R., & Hertel, W. M. (2011). Economic impact of biofouling on a naval surface ship. Biofouling, 27(1), 87–98.
- Townsin, R. L. (2003). The ship hull fouling penalty. Biofouling, 19(1), 9–15.
- Woods Hole Oceanographic Institution. (1952). Marine fouling and its prevention: Prepared for Bureau of Ships. George Banta Publishing Company.
- Zanoun, E., Nagib, S. H., & Durst, F. (2009). Refined cf relation for turbulent channels and consequences for high-Re experiments. Fluid Dynamics Research, 41(2), Article 021405.
- Başlangıç: 2021
- Yayıncı: Yıldız Teknik Üniversitesi
Sayıdaki Diğer Makaleler
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