Study On Symphonic Roof Drainage Systems

A great deal of large-scaled workshop storehouse emporium hotel gymnasium having been built. All these architectures are built with roof of large area, and have a lot of shapes. Traditional drainage systems can't adapt these changes. Recent years, advanced symphonic roof drainage system is adopted foreign and domestic. Along with the development of economy in our country, more and more architectures with roof of large area will be applied in our daily life, and this technology has a large potential market, but this has not developed well in our country,which makes it expensive, and restricted its usage to roofs with large area. We can reduce its price and enlarge its range of application to roofs with middle or small area on condition that we can produce it ourselves. Accordingly exploitation of this system has large application in our country.The main points of the thesis are as follows:On the fringe analyzing of siphonic roof drainage system and criterion, I have established an optimized roof drainage system model based on genetic algorithm, which makes the course of designing predigest. This optimized model solve the problem of the smallest investment efficiently, therefore, it provides an assist to the designing of roof drainage system.Mathematical calculation adopted turbulence model of Reynolds stress equation, finite volume method and second-order upwind scheme;while coupling numeration of velocity field and tress was based on SIMPLE;and flow field is simulated with VOF. Then I simulated the course of water drainage in the water drainage gutter, and analyzed the state of velocity and pressure in the gutter.According to the experiment of water drainage gutter, I have determined the data in the real state, proving the validity of the numerical simulation.