摘要
对塔影效应简化模型进行了试验研究,将上游叶轮简化为二维平板,下游塔架简化为二维圆柱,借助压力传感器及粒子图像测速技术,测量了8种平板位置下圆柱表面压力分布及干涉区域瞬态速度场数据,分析了圆柱表面压力、升力因数、阻力因数、干涉区域时均速度场及其相干特性。研究结果表明:靠近平板的圆柱一侧受平板影响较为明显,且随平板远离圆柱,圆柱表面压力因数与无平板时压力因数的相关系数自-0.37增至0.97,圆柱所受合力因数在原值(1.12)的72%与115%之间。
A simplified tower shadow model was investigated by experiment. The upstream impeller was simplified into a two-dimension plate,and the downstream tower was simplified into a two-dimension cylinder.The pressure sensor and particle image velocimetry( PIV) technique were employed for the measurement of the pressure distribution on the cylinder surface and the interaction region transient velocity field data under eight plate positions. The pressure distribution on the cylinder surface,the lift coefficient,the resistance coefficient,the time-averaged velocity field and its coherent characteristics of the interaction region were analyzed. The results show that the effect of the plate on the side of the cylinder near the plate is more obvious.With the plate moving away from the cylinder,the correlation coefficient between the pressure coefficient distributions of the cylinder surface with and without the plate increases from- 0. 37 to 0. 97,and the cylinder suffered resultant force fluctuates between 72% and 115% of the original value 1. 12.
出处
《河南科技大学学报（自然科学版）》
CAS
北大核心
2016年第4期26-31,4-5,共6页
Journal of Henan University of Science And Technology:Natural Science
基金
湖北省自然科学基金项目(2015CFB628)
华中科技大学自主创新基金项目(2015TS035)
关键词
塔影效应
圆柱
压力分布
粒子图像测速技术
tower shadow
cylinder
pressure measurement
particle image velocimetry
