EXPERIMENTAL MEASUREMENTS ON A CIRCULAR DISC IN FLOW

محتوى المقالة الرئيسي

Khalid A. Joudi
Abdullah A. Kendoush
Abdul-Rahman J. Mohammed

الملخص

An experimental investigation was made for the study of incompressible flow on a circular disc. It consists of two parts. The first was the determination of the pressure distribution of the front an! rear sides of three samples of dises with diameters 9.73,10.75 and 11.94cm and 3mm thickness.Th: dises were mounted normal to the flow direction. This part also included the determination of pressure distribution on the front and rear sides of an inclined dise of 10.75 cm diameter it inclination angles of 30, 60, 120, and 150 to the horizontal. The second part of the investigation was the determination of the drag coefficient on a circular disc 10.75 cm in diameter and 3 mm in thickness using two methods. The first using strain gages as sensitive elements. The strain readings were recorded and transformed into drag force by using a transformation system or by using the strain transformation equations. The second using a dial gage whereby the displacement was transformed into drag force. Drag determination was performed for normal and inclined disc. Inclination included 30,60 and 90 to the horizontal. Tests were made using a low speed wind tunnel, at low, medium and high velocities of 4.74, 8.316 and 10.35 m/s respectively. The experimental results compared well with theoretical predications and with available published data

تفاصيل المقالة

كيفية الاقتباس
"EXPERIMENTAL MEASUREMENTS ON A CIRCULAR DISC IN FLOW" (2003) مجلة الهندسة, 9(01), ص 9–23. doi:10.31026/j.eng.2003.01.02.
القسم
Articles

كيفية الاقتباس

"EXPERIMENTAL MEASUREMENTS ON A CIRCULAR DISC IN FLOW" (2003) مجلة الهندسة, 9(01), ص 9–23. doi:10.31026/j.eng.2003.01.02.

تواريخ المنشور

المراجع

Calvert, J.R., (1967). Experiments on the Flow Past an Inclined Disc, Journal of Fluid Mechanic i Vol.29, Part 4, pp 691-703.

Davies, M., and Taylor, G., (1949), The Mechanics of Large Bubbles Rising Through Extended Liquids and Through Liquids in Tubes, Proceeding of Royal Society, A 200,pp 375.384.

Kendoush, A.A., (2000), Hydrodynamics and Heat Convection From a Dise Facing a Uniform Flow, Submitted to the International Journal of Heat and Mass Transfer.

Kledher, Ali K. (2000). Theoretical and Experimental Investigation of Unsteady Forces on a Cascade of Axial Flow Compressor Blades, M.Sc Thesis. College of Engineering. Univ of Baghdad.

Michael. P. (1966). Steady Motion of a Dise in a Viscous Fluids. The Physics of Flaids, Vol.9,No. 2, pp 466-471

Roos, W., and Willmarth, W., (1971), Some Experimental Results on Sphere and Disc Drag, ALAA Journal, Vol. 9, No. 2, pp 285-291

Ower, L. and Pankhurest, R. (1977), The Measurement of Airflow, 5th ed in St units, Pergamen press

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