住宅排气道系统空气动力学性能研究

发布时间：2018-07-26 19:19

【摘要】：本研究主要对本国现在的高层住宅排气道系统的存在的串味、倒灌等问题以及合理选取系统,包括排气道和系统构件进行研究。研究对住宅排气道的工程设计和制造生产行业有着重要的指导和促进发展的作用。本文选取典型的住宅排气道系统为研究对象,采用现场试验和理论分析为研究方法,根据标准规定的测试方法,对住宅排气道系统的通风性能进行试验,对系统内部的气流组织分布,管内压力、支管排气量分布及住宅用户排气量等进行试验研究和分析,掌握系统的不同工况的气流特性,确定住宅排气道系统空气动力学性能的一般规律,主要包括以下几个方面。对三种住宅排气道系统进行了试验和理论分析,包括双截面住宅排气道系统、等截面住宅排气道系统和变截面住宅排气道系统。试验表明双截面排气道系统的主管静压曲线较平缓,变截面排气道系统的中部的风量较大,且平均风量较高,有利于用户排气。对于中低层住宅排气道系统进行了试验,得到了动力源的对系统影响的特性：动力源离底层的距离越近,系统内部平均静压越高,阻力损失越大。动力源分布越均匀,系统的阻力损失越小,气流相对越稳定；调整间距,可以使气流组织分布均匀,阻力损失变小。对于高层住宅排气道系统进行了试验,结果表明动力源与住宅排气道的耦合特性与中低层的一致,得到了动力源与系统耦合的一般规律。对不同截面的住宅排气道系统进行试验,结果表明了截面积的增大能够改善用户的排气效果,降低系统的倒灌压力。对有动力风帽和无动力风帽的系统分别进行试验,结果表明有动力风帽的系统排气效果比无动力风帽的住宅排气道系统的差。有动力风帽的系统的阻力随着开机率的提高不断增大。
[Abstract]:This paper mainly studies the existing problems of the exhaust duct system of the high-rise residential building in our country, such as flavor, backwater, and reasonable selection of the system, including the exhaust channel and the system components. The research plays an important role in guiding and promoting the development of the engineering design and manufacturing industry of the exhaust ducts. This paper selects the typical residential exhaust duct system as the research object, adopts the field test and the theory analysis as the research method, according to the standard regulation test method, carries on the test to the housing exhaust duct system ventilation performance, The distribution of airflow in the system, the pressure in the pipe, the distribution of the exhaust volume of the branch pipe and the exhaust volume of the residential users are studied and analyzed experimentally, and the characteristics of the airflow in different working conditions of the system are grasped. Determine the general law of aerodynamics performance of residential exhaust system, mainly including the following aspects. Three kinds of residential exhaust duct systems are tested and theoretically analyzed, including the two-section residential exhaust duct system, the equal-section residential exhaust duct system and the variable cross-section residential exhaust duct system. The test results show that the pressure curve of the double section exhaust duct system is gentle, and the middle part of the variable section exhaust duct system has a larger air volume and a higher average air volume, which is beneficial to the exhaust of the users. The experimental results show that the influence of the power source on the system is that the closer the power source is to the bottom layer, the higher the internal mean static pressure is and the greater the resistance loss is. The more uniform the distribution of the power source, the smaller the resistance loss of the system and the more stable the airflow, and the more uniform the distribution of the airflow is, the smaller the resistance loss can be. The experimental results show that the coupling characteristics of power source and exhaust duct are consistent with those of middle and low levels, and the general law of coupling between power source and system is obtained. The experimental results show that the increase of cross-sectional area can improve the exhaust effect of the users and reduce the pressure of the system. The experimental results show that the exhaust efficiency of the system with power hood is worse than that of the exhaust duct system without power hood. The resistance of the system with power hood increases with the increase of startup rate.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU834

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