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One application of vortex blowers is to provide compressed air for fuel cell stack in fuel cell cars developed by Tongji University. However, it produces too much noise; therefore, it needs to analyze its flow field to study the mechanism of noise generation. In this article a complete CAD model of the vortex blower was first established by means of reverse engineering and its basic geometric parameters...
The technology of computer modeling and simulation is applied to compute and analyze external flow field of the wheels for a medium-class passenger car. Comparisons are drawn between the different results of flow field around the wheels in case that the flow field is modeled and solved with the two different boundary conditions of wheel: one is the stationary wall and the other is the rotating wall...
This article has proposed a new method for designing and studying engine intake system based on the technology of CAD/CAE/CFD integration. Firstly, according to the similarity principle and pressure wave theory, the structure parameters of target engine intake system were defined referencing the similar engine. Then, the intake system parameters were input into GT-power, and the intake system performance...
The multi-scale laser scanning technology is used to obtain the Three-dimensional (3D) data of a large pump. This technology is more accurate and faster than the traditional measurement methods when obtaining the data of complex shape entities. The data obtained from multi-scale laser scanning technology can be used in reverse engineering CAD modeling of pump. They can also be used to get the model...
A new cross flow solid-liquid separate equipment with high efficiency has been proposed, and comparative experiment investigations between the municipal sewage plant and the test device of the separator and the numerical simulation of the device flow field using FLUENT CFD software have been combined to define its basic operating parameters and precipitation characteristics, and has laid the foundation...
The axial force estimation is a crucial problem in the design of deep well pump. Accounting to the plenty of time and financial resources cost by experimental measurement and low precision and applicability by using of experiential formulas, the effects of solid modeling, mesh generation, residual convergence precision, turbulence model and numerical solutions on the accuracy of numerical simulation...
In order to improve the performance of 16V240ZJB diesel engine, the method of steady flow test and CFD numerical simulation was adopted to do intake port structure optimization study. The previous design model of intake port was tested in the steady flow experiment system which provided the boundary condition for simulation calculation. The three-dimensional CAD model of intake port was built and...
Based on the Navier-Stokes equations for viscous, incompressible fluid and VOF method, the numerical experiment platform of oil containment by rigid floating boom in wave is established, utilizing the commercial CFD software FLUENT, and the waves are generated by defining the velocity of water particle on the inlet boundary. The volume of fluid (VOF) model is used to distinguish the three immiscible...
An Air-conditioned dormitory in winter is used as a model to study indoor airflow and human thermal comfort. This paper uses κ-ε - three-dimensional turbulence model and N-S equation, considers airflow with room shape and obstacles as one, calculates the indoor airflow and heat transfer problems with overall solution, studies indoor air form especially velocity field with numerical simulation. From...
An evaluation of the Computational Fluid Dynamics (CFD) sub-models for in-cylinder diesel engine combustion and emission simulations was conducted using an integrated numerical model from commercial CFD software FLUENT 6.3.26. As these simulations are sensitive to user-defined empirical parameters, the main aim of this investigation is to obtain an adjusted set of model parameters in order to achieve...
This piece of work seeks to address issues related to combustion of diesel fuel in light-duty engines, with an emphasis on bridging detailed chemical kinetics mechanism and Computational Fluid Dynamics (CFD). Numerical computation was undertaken by means of integrating CHEMKIN and FLUENT software. The computational effort was focused onto the Laminar Finite Rate model, incorporating a surrogate diesel...
Fluid-flexible-structure-interaction is a challenging problem in fluid dynamics that is not well understood, due to the highly complicated nature of the problem. Vortex motion plays a central role in such interaction. In this paper we visualize the vortex shedding from a flexible plate tethered at its midline in a viscous incompressible flow in three dimensions. By arranging visualized features along...
The method of CFD integrated with CAD is presented to optimize fluid machinery design parameter in the paper. Firstly, the parameter to be optimized is determined. Secondly, the CAD technology is applied to build three-dimensional fluid machinery parameterization models by the parameter in its range, which is used to calculate three-dimensional flow field in the fluid machinery model by CFD software...
Computational fluid dynamics has become increasingly important for performance evaluation in the product development process. Computer visualization provides an efficient way to assess the performance of a product. The sonification feedback of CAD system analysis, in addition to the visual interface, can increase the amount of information the user receives, reduce the load of visual channel, and provide...
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