Measurements of instantaneous pressure fluctuations on a trapezoidal cross-section cylinder indicate that the low-frequency variations embedded in the vortex-shedding process can be successfully suppressed by insertion of a splitter plate whose length is twice the maximum width of the trapezoidal cylinder. The experiments were performed at Reynolds numbers in a range of 5 × 103 to 4·5 × 104. Spanwise correlation of the pressure fluctuations measured on the cylinder further indicates that the suppression of low-frequency variations improves the degree of two-dimensionality of vortex shedding. These findings are attributed to the presence of the splitter plate having an effect on stabilizing the vortex formation length which is comparable to the length of the splitter plate, thus eliminating the low-frequency variations embedded in the base pressure.
All Science Journal Classification (ASJC) codes
- Mechanical Engineering