船舶推进水动力性能预测技术在LOGOS软件包中的验证

A. Kuznetsova, A. Taranov
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引用次数: 0

摘要

研究对象和目的。研究对象是喷水推进器和叶轮的模型。本工作的目的是通过与国外商业软件中的实验研究数据和参考计算的比较,验证国内工程分析软件复合体的新计算模块LOGOS及其在船舶推进水动力性能预测中的应用技术。材料和方法。计算流体动力学方法用于确定船舶推进系统的流体动力学性能。用控制体积法求解非平稳雷诺方程(RANS),得到粘性流体的流动特性。雷诺方程由双参数半经验湍流模型封闭。为了验证LOGOS软件包中的数值建模结果,使用了Krylov中心进行的实验研究和参考计算的数据。主要结果。在与实验研究和参考计算结果比较的基础上,对LOGOS软件复合体的新计算模块进行了验证,证明了现代国产计算流体动力学软件在解决确定螺旋桨水动力性能问题方面的高精度。结论本文表明,利用国产LOGOS软件包可以确定船舶推进模型在均匀粘性流体流中的水动力性能。同时,在Krylov中心深水拖曳池中进行的实验研究结果证实,预测螺旋桨水动力性能的准确性优于国外领先的软件产品。同时,需要进一步开发LOGOS软件包,以正确解决与船舶推进有关的更复杂的任务。
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Validation of prediction technology of ship propulsion hydrodynamic performance in LOGOS software package
Object and purpose of research. The objects of research are models of propeller and impeller of a water jet. The purpose of the work is to validate the new calculation module LOGOS of domestic software complex for engineering analysis and the technology for its use in predicting the hydrodynamic performance of ship propulsion based on comparison with experimental research data and reference calculations in foreign commercial software. Materials and methods. Methods of computational fluid dynamics are used to determine the hydrodynamic performance of ship propulsion systems. The characteristics of the viscous fluid flow are obtained from the solution of non-stationary Reynolds equations (RANS (Reynolds averaged Navier-Stokes equations)) by control volume method. The Reynolds equations are closed by a two-parameter semi-empirical turbulence model. To validate the results of numerical modeling in the LOGOS software package, data from experimental studies and reference calculations performed at the Krylov Center are used. Main results. Validation of the new calculation module of LOGOS software complex, performed on the basis of comparison with the results of experimental studies and reference calculations, demonstrates the high accuracy of modern domestic software in the field of computational fluid dynamics in solving problems of determining the hydrodynamic performance of propellers. Conclusion. The paper shows that the determination of hydrodynamic performance of ship propulsion models in a uniform viscous fluid flow can be performed using the domestic software package LOGOS. The accuracy of predicting the hydrodynamic performance of propellers in the meantime compares favourably to leading foreign software products and is confirmed by the results of experimental studies carried out in the deepwater towing tank of Krylov Center. At the same time, further development of the LOGOS software package is required for the correct solution of more complex tasks related to ship propulsion.
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3 weeks
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