自動車用HVACにおける高・低温空気流の乱流混合に関する研究 : 平行せん断層における熱輸送(熱工学,内燃機関,動力など)

概要

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In HVAC (Heating, Ventilating, Air Conditioning) unit used in an automobile air-conditioning system, hot air heated by a heater core and cold air cooled by an evaporator is mixed to control the air temperature blown into the compartment. In simulating numerically the temperature control characteristics of the HVAC, the modeling of turbulent mixing process of hot and cold air is a key issue for improving the performance of the simulation. Detailed knowledge on the turbulent air mixing in HVAC unit is, however, quite scarce. Hence, as the first step to make clear the air mixing process in HVAC, we have made an experimental study on trubulent thermal mixing in a simple planar shear layer. In particular, the distributions of turbulent heat fluxes and turbulent Prandtl number over the mixing layer have been measured for two velocity ratios, and based on the experimental data, the production mechanism of the turbulent heat fluxes has been examined in detail.
社団法人日本機械学会の論文
2005-01-25