A Statistical Description of Pressure and Velocity Fields at the Trailing Edges of a Flat Strut
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD
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An experimental determination has been made of the turbulent field quantities which exist at trailing edges. The investigation was carried out on a rigid strut with parallel sides and circular leading edge the strut was not yawed to the flow. Discussions cover broad cases of 1 trailing edges that produce periodic wakes, and 2 trailing edges that produce random wake structures. In each case, the time-averaged, boundary-layer characteristics streamwise turbulence intensities and fluctuating surface pressures have been spatially mapped in the region of each edge. Correspondence between surface pressures and turbulent fields in both the immediate vicinity and the far wake of each edge were determined by correlation analyses. Results show a mechanism of pressure production which is common to both random and periodic pressures. They also indicate that the mechanism differs from that which produces attached boundary-layer--wall-pressure fluctuations.
- Marine Engineering
- Fluid Mechanics