【作者】 李小剑； 刘泽勤； 陆佩强； 牛建会；

【Author】 Li Xiaojian Liu Ze Qin Lu Peiqiang Niu Jianhui (Institute of Refrigeration and Cryogenics, Tianjin University of Commerce, Tianjin, 300134)

【机构】 天津商学院制冷与空调工程系；

【摘要】 研究微粒流在环境空气中的自由下落是气固两相流研究的一个重要领域,在微粒流的自由下降过程中,环境空气也会被下落运动的微粒流卷吸到微粒流场中,常常产生大量的粉尘,从而使得室内工作场合的空气被严重污染。本文介绍了目前国际学术界在该方面的研究进展,并从微粒流的下降高度、微粒流的质量流量、微粒粒径、微粒密度等几方面讨论了自由下落微粒流对下落过程中产生的卷吸空气量的影响, 同时介绍了对微粒粉尘和卷吸空气进行量化和模拟的一些方法,并对这些方法进行了分析。更多还原

【Abstract】 The study of the stream of particles that undergoes free-fall through a quiescent ambient air is an important field of the gas-solid two phases flow. In the process of particles free falling, the surrounding air is entrained into the particle stream, and the fugitive dust may be generated. The air quality of the working environment is badly polluted. This paper describes the recent studies of the international academic researches. The influences of the quantity of entrained air in the free falling particles are discussed in the aspects of the particle stream drop height, mass flow, particle diameter and particle density. Some methods of the quantification and simulation to the fugitive dust and air entrainment are also introduced and analyzed.更多还原