Валидация технологии прогнозирования гидродинамических характеристик судовых движителей в пакете программ «ЛОГОС»

Abstract

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.