Numerical Simulation on Flow Field and Design Optimization of a Generator Unit Based on Computational Fluid Dynamics Analysis

Achieving an optimal cooling of the generator unit is indispensable for high working performance. In this work, computational fluid dynamics analysis on the flow field of the conventional type and silent type of the S688CCS series generator unit is conducted, and design optimization of the generator unit with poor cooling is studied based on flow field analysis results. Flow field simulation results indicate that the total cooling air quantity of the silent type generator unit is lower than that of the conventional type generator unit, and the cooling air quantity of the radiator is also lower than that of the conventional type generator unit, which is not conductive for the cooling of the silent type generator unit. The flow field optimization is achieved by adopting the single variable control method to improve the structure of the fan cover, silent components for silence, adjacent structure, and air inlet grille. The corresponding structure optimization scheme is put forward. After optimization, the air quantity for the cooling radiator of the silent type generator unit is 44.33% higher than that of its original structure, and the total cooling air quantity is higher than that of the conventional type generator unit. The research results in this work can provide a theoretical basis for the design of the cooling air flow path of generator units for achieving an optimal cooling performance.

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Computational fluid dynamics analysis of the influence of injection nozzle lateral outflow on the performance of Ranque-Hilsch vortex tube

Thermal Science ◽

10.2298/tsci120704002p ◽

2014 ◽

Vol 18 (4) ◽

pp. 1191-1201 ◽

Cited By ~ 1

Author(s):

Nader Pourmahmoud ◽

Alireza Izadi ◽

Amir Hassanzadeh ◽

Ashkan Jahangiramini

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Flow Field ◽

Vortex Tube ◽

Operating Conditions ◽

Energy Separation ◽

Physical Parameters ◽

Dynamics Analysis ◽

Computational Domain ◽

Computational Fluid Dynamics Analysis

In this article computational fluid dynamics analysis of a three-dimensional compressible and turbulent flow has been carried out through a vortex tube. The standard k-? turbulence model is utilized in order to simulate an axisymmetric computational domain. The numerical simulation has focused on the energy separation and flow field patterns of a somewhat nonconventional vortex tube, which is on the basis of creating an external hole at the end of each nozzle. According to the selected nozzles geometry, some of unfavorable phenomena such as shock wave, high pressure regions and appearing of unsymmetrical rotating flow patterns in the vortex chamber would be recovered significantly. In this way the physical parameters of flow field are derived under different both inlet mass flow rates and outlet pressures of nozzles hole (OPH). The results show that increasing OPH value enhanced the cooling capacity of machine in the most of operating conditions.

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Computational Fluid Dynamics Analysis of the Flow Field Around Spark Gap in a Two Valve Engine

10.4271/2014-36-0365 ◽

2014 ◽

Author(s):

Leonardo Fonseca ◽

Raphael Meireles ◽

Rudolf Huebner ◽

Matheus Carvalho ◽

Ramon Molina

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Flow Field ◽

Dynamics Analysis ◽

Spark Gap ◽

Computational Fluid Dynamics Analysis ◽

Valve Engine

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Computational Fluid Dynamics Analysis for Flow Field of Radiator Air Intake in the Powertrain Compartment

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.464.171 ◽

2013 ◽

Vol 464 ◽

pp. 171-175

Author(s):

Lin Lin Song ◽

Wei Zheng Zhang ◽

Yuan Fu Cao ◽

Ya Lei Zeng

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Flow Field ◽

Air Flow ◽

Flow Distribution ◽

Heat Transfer Analysis ◽

Wind Speeds ◽

Computational Fluid Dynamics Analysis ◽

Cooling Air Flow ◽

Cooling Air

A computational fluid dynamics (CFD) model of tank powertrain compartment was constructed for cooling air flow and heat transfer analysis. The key points temperatures of the powertrain compartment were tested, and the numerical values have a good agreement with the measurement datas. Detailed cooling air flow field distributing characteristic through radiators in the powertrain compartment were obtained through numerical method, with different fan speeds and ambient wind speeds. These results can provide the basis for the choice of the fan speed on specific condition and the air flow distribution of the radiator.

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