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首页> 外文期刊>ISRN Mechanical Engineering >Numerical Hydroacoustic Analysis of NACA Foils in Marine Applications and Comparison of Their Acoustic Behavior
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Numerical Hydroacoustic Analysis of NACA Foils in Marine Applications and Comparison of Their Acoustic Behavior

机译：NACA箔在船舶上的数值水声分析及其声学行为的比较。

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One of the most important parameters to be considered in the design process of lifting surfaces for marine applications is the acoustic noise emitted by the designed surface. In the present work, the hydroacoustic fields of NACA0012 and NACA0018 hydrofoils are calculated, and the acoustic behavior of these sections is examined and compared at different angles of attack. The Ansys-CFX Navier-Stokes solver is used for hydrodynamic analysis, and a highly accurate multithread program named ACOPY is developed in Python programming language based on the Ffowcs Williams and Hawkings method for acoustic analysis. The developed code has high capability in parallel programming. Results of hydrodynamic and acoustic analyses have been validated against available data. A parametric study is conducted, and the best integration surface for FW-H method is introduced. The acoustic behavior of the sections is calculated in an extensive parametric study for different angles of attack of the hydrofoils. The operational acoustic fields of the foils have been calculated and compared. The results indicate that NACA0012 hydrofoil is a better choice and, more effective, when the acoustic behavior of the hydrofoil is a significant design criterion.
机译：在船舶用起重表面的设计过程中要考虑的最重要参数之一是设计表面发出的声噪声。在本工作中，计算了NACA0012和NACA0018水翼的水声场，并检查和比较了这些截面在不同迎角下的声学特性。 Ansys-CFX Navier-Stokes求解器用于流体动力学分析，并基于Ffowcs Williams和Hawkings方法，使用Python编程语言开发了名为ACOPY的高精度多线程程序，用于声学分析。开发的代码在并行编程中具有很高的能力。流体力学和声学分析的结果已根据可用数据进行了验证。进行了参数研究，并介绍了用于FW-H方法的最佳积分面。在广泛的参数研究中，针对水翼的不同迎角计算了截面的声学特性。箔片的工作声场已被计算和比较。结果表明，当水翼的声学特性成为重要的设计标准时，NACA0012水翼是一个更好的选择，并且更加有效。

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