Development of ventilation system for smoking space separating by circulation flow and re-circulation flow

[实验]1)设计制作了可再现多种通风特性的精确房间模型。利用该精确室内模型，在室内设置障碍物和热体等情况下，详细测量了室内平均风速和各种湍流统计量，并详细分析了再循环气流对室内通风的影响。2)利用暖体假人测量了人体代谢热对人体周围小气候中的温度和平均风速的影响。此外，利用超细粒子的热电偶测量了体表边界层的温度梯度，并直接计算了对流换热系数。[数值模拟]1)上述精确模型采用大涡模拟和标准k-epsilon模型模拟。结果表明，大涡模拟的分析结果与实验结果吻合较好，并具有足够的精度，可以用来详细研究天花板侧槽式供电口的供电流粘附性、功率范围、线型排气口、转弯流动和再循环流动。此外，标准k-epsilon模型具有足够的分析精度，在模型的分析中验证了该方法的有效性。2)利用计算热假人对被动吸烟特性进行了模拟，并通过室内热假人的实验验证了其准确性。(1)房间通风系统，(2)人体布置，(3)香烟从嘴里呼出的速度变化，在不同的环境下，我们分析了烟雾在人体周围的扩散特性。

[Experiment]1) We designed and made the precise room model which can reproduce a variety of ventilation properties. An average velocity of the wind and various turbulence statistics amounts were measured in detail in the case of setting up the obstacle and the heat body, etc. indoors in all cases by using this precise room model, and the effectiveness to the indoor ventilation of the re-circulation flow was analyzed in detail.2) The temperature and the average velocity of the wind in micro climate around the human body by metabolic heat of the human body were measured with a thermal manikin. Moreover, the temperature gradient in the boundary layer from the skin of the body was measured by using the thermo-couple of the extra fine, and the convection heat transfer coefficient was calculated directly.[Numeric simulation]1) The above-mentioned precise model was simulated using LES and standard k-epsilon model. It was shown that an analytical result by LES agreed to the experiment very well, and had enough accuracy as a technique by which the adhesion of supply flow from slot type supply opening on the ceiling side and the range of the power the line type exhaust opening and the turn flow and the re-circulation flow can be examined in detail. Moreover, standard k-epsilon model have enough analytical accuracy, and effectiveness as the technique by which various cases were examined was confirmed in the analysis by the model.2) Passive smoking properties were simulated with a computational thermal manikin from which accuracy was verified by the experiment with the above-mentioned thermal manikin in the room. (1)Room ventilation system, (2)arrangement of the human bodies, (3)exhalation velocity of cigarette smoke from the mouth being changed, under the various environment, we analyzed the smoke diffusion properties around the human body.