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With the acceleration of China's urbanization, living environment has become a major consideration of residents. Natural ventilation, as an important component of living environment, has therefore received more and more attention in the designing and building of residence. The paper introduces CFD technique to simulate flow field, and employs SIMPLE algorithm and QUICK difference scheme to conduct...
The non-leaf shell centripetal turbines are used extensively in vehicle exhaust turbochargers; the function of vortex shell has great influences on turbocharger performance. This paper presents a new way for researching on the three dimensional flow field of vehicle turbocharger, in the process of studying the vortex flow field not only the engine working conditions on the vortex flow field are considered...
Computational Fluid Dynamics (CFD) is used for the investigation of the piston wind. This paper analyzes the formation of piston wind. The simulation model of piston wind is established based on the analysis of the the air flow in the subway tunnel and the production mechanism of piston wind. Simulation results by fluent software indicates that it is consistent with the experimental one. It notes...
A method moving vehicle noise simulation was given. Geometric model of a sedan car is built using Pro/E. Analytical model was built by meshing using GAMBIT. FLUENT was applied to solve the steady simulation using RANS method. The noise source distribution of the vehicle surface is predicted based on the Broadband Noise Source Model. The unsteady simulation is solved using LES method. The far-field...
This paper presents the computational results of studies on the flow characteristics of V-U and U-U notch. To simulate the flow features, three-dimensional models are developed as commercially available fluid flow models. The computational fluid dynamics (CFD) is then used to analyze the flow features of throttle notches of valves. Numerically simulated the flow features of flow rates, discharge coefficients,...
The temperature field and the coupling mechanism of the airflow in transportation channel was analysed by the currency software FLUENT, based on the conservation principle, by using the single-phasic multicomponent model. The simulation result was also compared with the temperature measured in mine. Then the atomizer spray refrigeration process of two schemes were simulated, considered the turbulent...
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 research analyzes distribution laws of exhaust-gas of burning liquefied-gas in closed kitchen without any kitchen hood or fan with the exergy indicator; and compares the distribution results from the exergy analysis with those from the concentration analysis. The methods are: establish the math models of exhaust-gas exergy and concentration distributions in some boundary conditions; use discrete...
In this paper, by the review of abrasive flow machining (AFM) and the principle of traditional process technology, a new polishing process technology about polishing internal surface of bend pipe, which is simpler, is developed. The turbine blade, which is a component of polishing ball, is designed and simulated by ANSYS-CFX (Blade Geometry, Advanced CFD and simulation). The flow of grinding media...
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