Promotion of Turbulent Thermal Mixing of Hot and Cold Airflows in T-junction
Promotion of Turbulent Thermal Mixing of Hot and Cold Airflows in T-junction
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DOI：
10.1007/s10494-007-9111-5
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发表时间：
2008-07
期刊：
影响因子：
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通讯作者：
M. Hirota;M. Kuroki;H. Nakayama;H. Asano;S. Hirayama
中科院分区：
文献类型：
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作者：
M. Hirota;M. Kuroki;H. Nakayama;H. Asano;S. Hirayama
模拟汽车空调系统的暖通空调机组，对矩形截面T形三通管内冷热气流湍流热混合的促进与控制进行了实验研究。为了促进湍流热混合，在T形接头上游沿与主流成45°方向的主流道中吹入了小射流。这些射流可以增加热混合层上部的湍流强度，从而有效地促进冷热气流的湍流混合。此外，还发现可以通过改变射流速度来控制热混合程度。
An experimental study has been conducted on the promotion and control of turbulent thermal mixing of hot and cold airflows in a T-junction with rectangular cross sections, which simulates the HVAC unit for automobile air-conditioning system. In order to promote the turbulent thermal mixing, small jets have been blown into the main channel at the upstream edge of the T-junction in the direction of 45° against the main flow. Turbulence intensity in the upper part of the thermal mixing layer can be increased with these jets, and consequently the turbulent mixing of hot and cold airflows is promoted effectively. Moreover, it has been found that the degree of thermal mixing can be controlled by changing the jet velocity.