Impact of the Inlet Flow Angle and Outlet Placement on the Indoor Air Quality

This study aims to optimize the influence of the inlet inclination angle on the Indoor Air Quality(IAQ),heat,and temperature distribution in mixed convection within a two-dimensional square cavityfilled with an air-CO_(2)mixture.The air-CO_(2)mixture enters the cavity through two inlet openings positioned at the top wall,which is set at the ambient temperature(TC).Three values of the Reynolds numbers,ranging from 1000 to 2000,are considered,while the Prandtl number is kept constant(Pr=0.71).The temperature distribution and streamlines are shown for Rayleigh number(Ra)equal to 104,three inlet inclination anglesϕ(0,π/6 andπ/4)and three CO_(2)concentrations values(1500,2500,3500 ppm)applied at both hot vertical walls(maintained at a constant temperature TH).Afinite volume method is used under the assumption of two-dimensional laminarflow to solve the NavierStokes and energy equations.The results indicate that inlet inclination angle has an impact on the indoor air quality(IAQ),which,in turn,affects the heat transfer distribution and thermal comfort within the cavity.

煤矿瓦斯储运机理研究

煤矿的生产和实践证明,矿井瓦斯的抽放及矿井瓦斯的涌出具有分区和成带的特点。通过对煤体孔隙、裂隙、裂缝的解析、扩散、渗流规律及瓦斯三维浓度场进行分析,指出了提高矿井瓦斯抽放及改造低渗透性煤层应努力的方向。

白血病患儿入住层流病房的护理

目的探讨自血病患儿化疗后严重骨髓抑制入住无菌层流病房的效果。 方法对8例白血病患儿在化疗后出现严重骨髓抑制（中性粒细胞绝对值〈0．5×10^9·L^-1）时入住无菌层流病房，并在层流病房中采取科学恰当的护理措施。 结果8例患儿入住层流病房时间为5～12d（平均8d），外周血各系均上升（中性粒细胞绝对值〉1．0×10^9·L^-1）。8例中除1例患上呼吸道感染外，其余均未发生口腔粘膜损害、肛周及其他部位感染。 结论无菌层流病房对白血病患儿顺利渡过化疗后骨髓抑制期具有重要作用。