The constant grows of the motor fuel prices increases the requirements to the quality of ship propulsion study on the design stage. Some unusual approaches that applied during development of the "Volgo-Donmax" class ship project are described in this article.
Mixing theory is important for its relevance in understanding some of the most fundamental problems involving bread dough flows, and for
its practical impact in connection with bakery industry and other food industries. Mixing is a crucial operation in the bakery industry. The bread dough is a very complex material, considered viscoelastic whose behavior depends on moisture content and temperature. The aim of this article is to develop advanced technology for modeling bread dough mixing, in order to provide a predictive capability of optimum design parameters of dough mixers using computational techniques.
A deeper understanding of the interaction between machine, packaging material and liquid product during the forming process of pouches is enabled by the use of numerical simulation.
Two different complex problems arising during spacecraft design are discussed in this paper. One problem is a definition of impulse for a safety separation of a parachute container lid. Another problem is defining a shock-wave interaction on the spacecraft at turning on emergency rescue system. Both problem are very hard and expensive for solving by experimental methods, and RSC Energia gets here all benefits of numerical simulation by using CFD code FlowVision.
This paper outlines development of method for simulation of complex fluid flows having arbitrary motion of free surfaces. The method is based on rectangular grid with dynamic local grid adaptation. For approximation of a curvilinear computational domain boundaries and a free surface the subgrid geometry resolution method is used. The free surface tracking is provided by VOF method.
The aerodynamic performance and the bypass flow field of a vertical axis wind turbine under self-starting are investigated using CFD simulations in this paper.
The noise of domestic machines including lawnmowers becomes an urgent issue. As the technology matures, designers need better tools to predict performance and efficiency of these machines across a wide range of operating conditions and find optimal ways to reduce noise.
Experiments fulfiled in CETIM have shown that tonal blade-passing-frequency (BPF) noise becomes predominant for lawn-mowers with a big rotor diameter. 2-D and 3-D CFD unsteady computations give a clear picture of pseudo-sound perturbation inside the casing of lawn-mower. Method of representation of unsteady motion of compressible fluid with subsonic flow as a sum of vortex mode (pseudo-sound) and acoustical mode (airborne sound) is used to define the sound near field.
Due to a current trend of increasing rotational speed and power, the problem of tone noise and pressure pulsation in centrifugal ventilators becomes a more urgent issue. Often the level of tones determines noise characteristics; mainly these are blade-passing frequencies (BPF).
An approach for solving Fluid Structure Interaction in aerospace application is presented in this paper. The proposed approach is based on the two-way coupling between CFD code FlowVision and FEA code ABAQUS. The codes are coupled directly without using any 3rd party software or intermediate
The description of the variable pitch propeller (VPP) is presented. An insight into this propeller operation is given. It's advantages which give the improvement of propulsion of different purpose ship in comparison with the traditional propeller are noted. To be said in the report it is confirmed by example.
The proposed fluid-structure interaction (FSI) approach is based on a two-way coupling between finite-element code Abaqus and finite-volume code FlowVision. The FSI simulation is possible due to a unique mesh generation method used in FlowVision.