METHODS OF PRESETING BOUNDARY CONDITIONS AND GEOMETRY OF THE SCREW-PROPELLER IN THE FLOW VISION
Journal Title: Наука та прогрес транспорту - Year 2018, Vol 0, Issue 5
Abstract
Purpose. The article is aimed to: generate 3D models of the screw-propellers under study, as well as the calculation box; carry out a series of numerical experiments to verify the obtained results with the corresponding results of the model experiments; study possible ways of setting a project to simulate the screw-propeller operation in free water; to evaluate the efficiency of the ways of project setting. Methodology. The analysis of possibilities and features of CFD-modeling using the example of studying the screw-propeller operation in free water is carried out. As a result, the ways of defining the boundary conditions and the geometry of the screw-propeller in the calculating project are revealed and analyzed for the reliability of the obtained calculation results. Recommendations on the use of the methods for setting the project for simulation of the screw-propeller operation in free water are formulated. Findings. Using the example of solving a practical problem on studying the influence of the screw-propeller geometry on its hydrodynamic efficiency, the expediency of CFD-technologies introduction into the design of screw-propellers is substantiated. This is evidenced both by numerical results and by visualization of the velocity and pressure distributions during the water stream flow around the screw-propeller. For the research, the screw-propellers with different profiling were used. The method using the sector model of the screw-propeller is the most inefficient way of setting the project for simulation of the screw-propeller operation. Originality. The results of the work are the part of the methodology for setting the project in the Flow Vision environment for conducting numerical experiments to simulate the screw-propeller operation in free water. Practical value. It is established that the way of setting the project for simulating the screw-propeller operation in free water using the «sliding» grid boundary condition is the most practical one. The validity of this conclusion is confirmed by the results obtained during large number of numerical experiments on flow around the rotating screw-propeller at a given speed. The universality of such method lies in the possibility of its application during calculation of the propulsion/steering unit, which operates behind the ship hull.
Authors and Affiliations
O. M. Kornelyuk
Keywords
Related Articles
- EP ID EP432192
- DOI 10.15802/stp2018/147713
- Views 77
- Downloads 0
СООТНОШЕНИЯ МЕЖДУ ЖЕСТКОСТНЫМИ ПОТЕРЯМИ И ПОТЕРЯМИ В ПОДШИПНИКАХ КАНАТНЫХ БЛОКОВ
Цель. Для уточнения величин коэффициента полезного действия (КПД) канатных блоков необходимо определить коэффициент жесткости канатов блоков с учетом классификационной группы механизма и угла обхвата канатом блока. Пред...
EXPERIMENTAL STUDY OF HORIZONTAL PRESSURE DISTRIBUTION ON CORRUGATED STEEL SILO WALLS
Purpose. The paper aims: 1) qualitative assessment of the nature of the container corrugated wall deformation caused by the load from bulk materials. 2) determination of the horizontal pressure redistribution scheme for...
THEORETICAL AND EXPERIMENTAL RESEARCH OF STRENGTH PROPERTIES OF SPINE BEAM OF FREIGHT CARS
Purpose. The purpose of this paper is to analyze the results of theoretical and experimental studies of the strength properties of rolling stock; search for design tools, modeling, selection, justification of the service...
ЗАЛЕЖНІСТЬ ВЕЛИЧИНИ ЗНОСУ ПАРИ ТЕРТЯ «П’ЯТНИК – ПІДП’ЯТНИК» ВІД ПРОБІГУ ВАНТАЖНОГО ВАГОНА
Мета. Дослідження спрямоване на розгляд взаємодії циліндричних поверхонь пари тертя «п’ятник – підп’ятник» вантажного вагона. Необхідно теоретично дослідити процес зносу та отримати залежність величини зносу підп’ятника...
ТЕХНИКО-ЭКОНОМИЧЕСКАЯ ОЦЕНКА ИСПОЛЬЗОВАНИЯ КОЛЕС ПЕРСПЕКТИВНОЙ КОНСТРУКТИВНОЙ СХЕМЫ ДЛЯ РЕЛЬСОВЫХ ЭКИПАЖЕЙ
Цель. В статье необходимо определить технико-экономическую эффективность от использования колес перспективной конструктивной схемы в ходовой части рельсового экипажа (вагона). Методика. Эффективность использования колес...