船用螺旋桨叶尖周围的流场测量和涡流识别程序

IF 2.7 4区 工程技术 Q2 ENGINEERING, CIVIL Journal of Marine Science and Technology Pub Date : 2024-05-06 DOI:10.1007/s00773-024-00997-2
Daijiro Arakawa, Yuki Sawada, Koichiro Shiraishi, Takashi Kanemaru, Jun Ando
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引用次数: 0

摘要

螺旋桨空化是造成船用螺旋桨周围压力波动和噪声的主要原因之一,而顶端涡旋空化则是造成高频水下辐射噪声的主要原因之一。要预测尖端涡旋空化,必须正确描述涡旋核心半径和尖端涡旋的涡旋环流。因此,在本研究中,使用 2D-PIV 对日本国立海洋研究所(NMRI)大型空化隧道 0.75 米直径工作区的模型螺旋桨顶端周围的非空化流场进行了测量。对识别程序进行了研究,以开发出桨尖涡流模型。通过应用兰金涡旋模型和布尔格斯涡旋模型,获得了尖端涡旋的涡旋特性(涡旋核心半径和涡旋环流)。与兰金涡旋模型相比,布尔格斯涡旋模型确定的尖端涡旋周围的速度和涡度测量值更为一致。布尔格斯涡模型适用于从尖端涡周围的测量流场中获得涡特性。使用伯格斯涡流模型识别得到的涡流特性表明,雷诺数对涡核半径和涡流环流的影响更大。雷诺数越高,漩涡核心半径越小,漩涡环流也越小。研究还表明,雷诺数的影响因螺旋桨叶片形状的不同而不同。
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Flow field measurements around a marine propeller tip and vortex identification procedures

Propeller cavitation is one of the main causes of pressure fluctuation and noise around marine propellers, and tip vortex cavitation is one of the main causes of high-frequency underwater radiated noise. To predict tip vortex cavitation, it is necessary to correctly describe the radius of the vortex core and the vortex circulation of the tip vortex. Therefore, in this study, non-cavitating flow field measurements around the tip of model propellers were made for the 0.75 m diameter working section of the large cavitation tunnel at the National Maritime Research Institute, Japan (NMRI) using 2D-PIV. Identification procedures were investigated to develop a tip vortex model. The vortex properties (radius of vortex core and vortex circulation) of the tip vortex were obtained by applying by a Rankine vortex model and a Burgers vortex model. The measured velocity and vorticity values around the tip vortex as identified by the Burgers vortex model were in better agreement than those given by the Rankine vortex model. The Burgers vortex model was suitable for obtaining vortex properties from the measured flow field around the tip vortex. The vortex properties obtained from the identification using the Burgers vortex model showed the Reynolds number demonstrated a greater effect on the radius of the vortex core and vortex circulation. The higher the Reynolds numbers, the smaller the radius of the vortex core and the smaller vortex circulation tends to be. It is also shown that this Reynolds number effect differs depending on the blade shape of the propellers.

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来源期刊
Journal of Marine Science and Technology
Journal of Marine Science and Technology 工程技术-工程:海洋
CiteScore
5.60
自引率
3.80%
发文量
47
审稿时长
7.5 months
期刊介绍: The Journal of Marine Science and Technology (JMST), presently indexed in EI and SCI Expanded, publishes original, high-quality, peer-reviewed research papers on marine studies including engineering, pure and applied science, and technology. The full text of the published papers is also made accessible at the JMST website to allow a rapid circulation.
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