船舶工程

[目的]为了分析直翼舵桨推进器结构参数选型和性能优化方面存在的不足，[方法]以FSDJ-400RE-C型直翼舵桨为研究对象，采用基于计算流体力学（CFD）数值模拟方法构建数学模型，对其水动力性能进行仿真分析。通过对进速系数J取值为0～2.4时的数值仿真结果与试验数据进行对比，验证构建的数学模型的准确性，其中：J=2.0工况下的效率偏差仅为6.628 5%。在此基础上，以J=2.0为代表工况，对桨叶长度、弦长和厚度等主要结构参数的压力场、速度场和水动力特性曲线进行对比分析，并以单一参数下桨叶水动力最优为条件进行参数组合仿真计算。[结果]结果表明：当桨叶长度为1 260 mm、弦长为510 mm、厚度为60 mm时，单参数下的水动力性能最优，但最优参数组合并非简单的叠加最优；以桨叶长度L为基准，当桨叶弦长C与L的比值为0.405、桨叶厚度T与C的比值为0.118时，直翼舵桨的水动力特性达到最佳状态。[结论]研究成果可供直翼舵桨的水动力性能预报、桨叶机构设计和优化参考。

[Purpose] Addressing the current research gap in structural parameter selection and performance optimization for straight-bladed rudder propellers, [Method] computational fluid dynamics Computational Fluid Dynamics(CFD) based numerical simulation is employed to conduct systematic hydrodynamic performance analysis on the FSDJ-400 RE-C model. By comparing simulation results with experimental data across different operating conditions(J=0～2.4), the accuracy of the constructed model is validated, with an efficiency deviation of only 6.628 5% at J=2.0. Based on this, J=2.0 is selected as the representative operating condition. Comparative analyses are conducted on the pressure field, velocity field, and hydrodynamic characteristic curves for key structural parameters including blade length, chord length, and thickness. Furthermore, parametric combination simulations are performed to optimize hydrodynamic performance under single-parameter conditions. [Result] The results indicate that optimal hydrodynamic performance under single-parameter conditions is achieved when the blade length is 1 260 mm, chord length is 510 mm, and thickness is 60 mm. However, the optimal parameter combination is not simply the sum of the optimal individual parameters. Using blade length L as the reference, the hydrodynamic characteristics of the straight-wing rudder propeller reached their optimal state when the chord ratio C/L=0.405 and the thickness ratio T/C=0.118. [Conclusion] It provides effective support for hydrodynamic performance prediction, blade mechanism design, and optimization of straight-wing rudder propellers.