Numerical Study on Cooling Effect of Engine Room Enclosure System

2008 ◽  
Author(s):  
Yee Seok Bae ◽  
Geun Jong Yoo ◽  
Hoon Ki Choi
Keyword(s):  
Heat Exchanger ◽  
Numerical Study ◽  
Flow Analysis ◽  
Cooling Capacity ◽  
Flow Path ◽  
Cooling Effect ◽  
Engine Room ◽  
Porous Media Model ◽  
Reduction Effect ◽  
Poor Ventilation

In engine room, proper enclosure system is preferable for reducing noise level but the enclosure system in the engine room causes bad influence on cooling performance due to poor ventilation. Cooling efficiency of the enclosure system can be improved by varying fan speed and proper flow path for ventilation. In this study, numerical analysis is performed to assess cooling effect of the enclosure system using finite volume method. The RNG k-ε model is adopted for turbulence model along with heat exchanger model and porous media model for heat exchanger analysis, and moving reference frame model for rotational fan. Cold flow analysis result shows reasonable agreement with experimental data. Analysis results show direct effect of velocity and temperature distribution on cooling ability in the enclosure system. Comparing with analysis result for the engine room which has no enclosure system, the case of total enclosure system which has box hole flow path shows the reasonable cooling capacity with noise reduction effect.

scholarly journals Flow characteristics and noise reduction effects of air cleaners of automobile intake systems with built-in resonators with space efficiency

2021 ◽  
Vol 9 (3A) ◽  
Author(s):  
Hoseop Song ◽  
◽  
Haengmuk Cho ◽  
Keyword(s):  
Pressure Drop ◽  
Noise Reduction ◽  
Transmission Loss ◽  
Flow Analysis ◽  
Flow Characteristics ◽  
Helmholtz Resonator ◽  
Space Efficiency ◽  
Engine Room ◽  
Air Cleaner ◽  
Reduction Effect

In an automobile intake system, Helmholtz resonator is often used to reduce intake noise. But there is a disadvantage in the engine room. Resonator brings low engine room space efficiency, because resonator needs some. In this paper, we propose air cleaner with built-in resonator for a limited space of air cleaner and analyze the pressure drop effect and the transmission loss performance of the resonator through flow analysis. The air cleaner with a built-in resonator had almost no difference in pressure drop with the conventional air cleaner. Some vortex in conventional air cleaner is removed, and also, the built-in resonator has noise reduction effect at 160Hz at 61dB such as same resonator.

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