The Experimental Study On Research On Airfoil Type Water Diversion Grate Hydrodynamic Characteristics Of Floating Debris Trapped

In recent years, urban construction in China, as the city continues to expand into a regional service area drainage systems is increasing, urban stormwater drainage problems increasingly apparent. Construction of the level of urban stormwater drain facilities and technological development can not meet the needs of sustainable urban development. Ministry of Construction to improve urban flood control and drainage capacity to develop a 10-year construction plan on urban infrastructure, the goal is to build the perfect urban stormwater in urban disaster prevention system construction, improve the urban anti-flood risk level.Urban drainage network generally comprises the collection, transmission and emission of the three systems, urban drainage systems as an important part of the collection of rainwater gullies are important structures, with the collection, discharge surface rainwater runoff, interception of floating debris and other more large-scale contamination, and transfusion rainwater to underground storm sewer important functions is the key technology and efficient operation of drainage systems. Efficiency rainwater collection and discharge port surface rainwater and interception of floating matter and other pollutants directly affect the safety and reliability of drainage systems operation.The test model of the experimental study gullies good shape and hydrodynamic flow conditions of the airfoil gullies to improve gullies floating debris and other pollutants trapped gullies anti blocking ability and capacity to reduce pollutants into the storm sewer and the water environment pollution. The gullies model tests using rainwater grate and engineering prototype test model Scale of 1:1, similar to the hydrodynamic design. Test, in accordance with the actual operating conditions of the prototype tested four different angles meet the water (30°,45°,60°,75°) streamlined airfoil section rainwater grill grate, a standard rain Bi child and one for the cylindrical section of the grid reference of rain grate, a total of six different types of grates.Rain grate trapped floats test results show that the impact of small-scale structure of the water surface of the grill grate dynamics of floating objects (typically leaves or foam blocks, etc.) in the transport and retention processes is not significant, floating debris in the rain trapping efficiency and distribution grate surface is mainly affected by the inflow of water runoff primary large-scale structure. Streamline airfoil section grille and standard rain grate and grate cylindrical rain 30°,45°,60°,75° rejection similar distribution of floating debris, airfoil gullies grate interception floats efficiency slightly higher than the standard gullies.30° Wing Gully grates holdout efficiency up to 90% to...