Measurements and Visualization in the Flowfield Behind a Model Propeller

Measurements and Visualization in the Flowfield Behind a Model Propeller
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模型螺旋桨后面流场的测量和可视化

DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
H. Koyama
H. Koyama
中科院分区：
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文献类型：
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作者：
Ryuji Fukada;H. Nigim;H. Koyama

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采用烟丝流动显示和热线风速仪技术对双叶螺旋桨后流场进行了实验研究。得到了平均和系综平均分布以及速度不稳定性数据。结果揭示了叶尖涡的形成机理和流场外部区域的反向流动，以及叶片正后方流动中的强烈缺陷。在叶片尾流中发现了高的不稳定性，而随着尾流区域下游距离的增加，观察到的值要低得多。此外，核心流的转变，从喷流到尾迹的流动和轮毂涡脱落到尾迹的影响进行了报道。
An experimental investigation of the flowfield behind a two-bladed propeller was conducted by using both smoke-wire flow visualization and hot-wire anemometer techniques. The mean-tune and the ensemble-averaged distributions and velocity unsteadiness data were obtained. The results revealed the tipvortex formation mechanism and the reverse flow in the outer region of the flowfield as well as a strong defect in the flow directly behind the blades. High unsteadiness was found within the blade wake, while much lower values were observed with the increasing distance downstream of the wake region. Also, the transformation of the core-flow from a jet-like to a wake-like flow and the influences of hub-vortex shedding into the wake were reported.