デルタ翼を用いたT形合流管内高・低温流の混合促進(拡散・熱物質輸送(1),一般講演)

概要

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Experimental study was made on promotion and control of turbulent mixing of hot and cold airflows in a T-junction with rectangular cross sections, which simulated an HVAC unit for automobile air-conditioning system. Delta wings were used as devices to promote the mixing, and the influences of their heights and attack of angles on the thermal mixing layer were examined in detail. Moreover, the mean velocity distributions in several cross sections before and after the merging of two flows were measured by PIV. It was found that the development of the thermal mixing layer is promoted by the delta wings and its development can be controlled by changing the attack of angles of the wings. The longitudinal vortices produced by the wings breaks after the merging of two flows, but their influence on the thermal mixing layer is maintained to further downstream cross sections.
2008-09-04