Measurement of axial hydrodynamic force on a yawed cylinder in a uniform stream

摘要

The experimental result of measurement of axial hydrodynamic forces on a yawed smooth circular cylinder in a uniform stream is presented. The result will be very useful for estimating the behavior of a thin cable towed at various yaw angles and subjected to ambient currents. The measurements were conducted for small and intermediate Reynolds numbers where accurate experimental results are lacking. The key to the success of this experimental investigation is the design and construction of a force measurement system based on the principle of analytical balance. The axial drag coefficient, C{sub}f, is found to be dependent on the Reynolds number as well as yaw angle. Comparisons with existing theoretical results at moderate and low Reynolds numbers are made.