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首页> 外文期刊>Ships and offshore structures >Investigation of the influence of an interceptor on the inlet velocity distribution of a waterjet-propelled ship using SPIV technology and RANS simulation
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Investigation of the influence of an interceptor on the inlet velocity distribution of a waterjet-propelled ship using SPIV technology and RANS simulation

机译：利用SPIV技术和RANS仿真研究拦截器对喷水推进船进口速度分布的影响

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摘要

To illustrate the effect of interceptor installation on waterjet-ship wake fields, inlet velocity distribution of a semi-planing waterjet-propelled ship operating under inlet-closed state has been assessed via stereo particle image velocimetry (SPIV) measurements and Reynolds-averaged Navier-Stokes (RANS) simulations. Results reveal that interceptor installation yields substantial drag reduction (6.06% on average) and alts the ship's sailing attitude whilst blocking the water flow in its installation area. Results of SPIV measurements demonstrated good agreement with those obtained via simulations, accurately capturing velocity characteristics in regions affected by fin stabilisers. Interceptor installation was observed to increase boundary-layer thickness near its installation location whilst lowering velocity across the capture area and reducing momentum and energy velocity coefficients by 2.1% and 4.1%, on average, respectively. As observed, changes in the ship's sailing attitude negligibly influenced the velocity distribution; instead, the interceptor's retarding effect was observed to be the main factor driving changes in inlet velocity distribution of waterjet-propelled ships.
机译：为了说明拦截器的安装对水喷射船尾流场的影响，已经通过立体粒子图像测速（SPIV）测量和雷诺平均Navier-S评估了在入口关闭状态下运行的半平面水喷射推进船的入口速度分布。斯托克斯（RANS）模拟。结果表明，拦截器的安装可显着降低阻力（平均为6.06％），并在阻止船舶安装区域水流的同时改变船舶的航行姿态。 SPIV测量的结果与通过仿真获得的结果吻合良好，可以精确捕获受鳍稳定器影响的区域的速度特征。拦截器的安装会增加其安装位置附近的边界层厚度，同时降低整个捕获区域的速度，并使动量和能量速度系数分别平均降低2.1％和4.1％。观察到，航行姿态的改变对速度分布的影响可忽略不计。取而代之的是，拦截器的阻滞作用是驱动喷水推进船进口速度分布变化的主要因素。

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