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首页> 外文会议>American Society of Mechanical Engineers(ASME) Summer Heat Transfer Conference(HT2005); 20050717-22; San Francisco,CA(UA) >EFFECT OF OSCILLATING FLOW ON THERMAL STRATIFICATION IN AN ENCLOSURE
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EFFECT OF OSCILLATING FLOW ON THERMAL STRATIFICATION IN AN ENCLOSURE

机译：外壳内振荡流对热分层的影响

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摘要

The present study aims at investigating the effect of oscillating flow on thermal stratification in a gas oven. To date, the fan convectors are common to reduce thermal stratification inside various types of oven. The impetus of the present study is to investigate the feasibility of flow oscillation to achieve more uniform distribution of air temperature within an oven. To produce the flow oscillation, an acoustic woofer is vertically installed on the back of a gas oven. The operating frequency of the acoustic woofer is varied from 30 to 60 Hz. Three-dimensional measurements of air temperature inside the oven are implemented to evaluate temperature uniformity. The experimental results show that the oscillating flow with a specific frequency enhances air mixing dramatically, which results in the attenuation of thermal stratification inside the oven. The actual baking of sponge cake also shows that the convector using the flow oscillation can provide better results compared to the conventional fan convectors.
机译：本研究旨在调查振荡流对燃气烤箱热分层的影响。迄今为止，风扇换流器是常见的，以减少各种类型烤箱内部的热分层。本研究的推动力是研究流动振荡以实现烤箱内空气温度更均匀分布的可行性。为了产生流动振荡，将低音扬声器垂直安装在燃气烤箱的背面。低音扬声器的工作频率在30到60 Hz之间变化。实施烤箱内部空气温度的三维测量以评估温度均匀性。实验结果表明，特定频率的振荡流显着增强了空气混合，从而减少了烤箱内部的热分层。海绵蛋糕的实际烘焙还表明，与传统的风扇对流器相比，使用流动振荡的对流器可以提供更好的结果。

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