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就二元半圆头细长型墩体的压力分布进行了较系统的风洞模拟试验。根据试验结果,分析了雷诺数的影响和边壁效应;给出了多种情况下的沿体压力分布和与之相应的最小压力系数值;讨论了不同雷诺数时的流动图像;导得了二元半圆头细长型墩体绕流的最小压力系数 C_(pmin)与雷诺数 R_(eD)及阻塞度 T/b 间的估算关系式。
A more systematic wind tunnel simulation test was conducted on the pressure distribution of the slender semi-circular pier. According to the experimental results, the influence of Reynolds number and the sidewall effect are analyzed. The pressure distribution along the body and the corresponding minimum pressure coefficient are given under different conditions. The flow images with different Reynolds numbers are discussed. The relationship between the minimum pressure coefficient C_ (pmin) and the Reynolds number R_ (eD) and the obstruction degree T / b of the flow around a semicircle slender pier.