Open AccessA Study on the Change of Displacement according to the Drainage Pump Outlet Shape and Size of Combat Equipment.
Author(s) -
Dae Un Kim,
Ki Jung Lee
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/804/1/012028
Subject(s) - inflow , drainage , environmental science , flow (mathematics) , volumetric flow rate , water discharge , water pressure , water flow , water level , spiral (railway) , geotechnical engineering , petroleum engineering , mechanics , geology , engineering , environmental engineering , mechanical engineering , physics , ecology , biology , cartography , geography
Combat equipment is designed to cross the river on its own. The important thing here is that first, the inflow of water should be minimal, and the second is draining out the inside of the inflow. In this study, we have studied how to effectively discharge the incoming water. The purpose of this study is to compare the flow rate, so the pump pressure was not considered. The flow analysis was carried out only by considering the head pressure and atmospheric pressure. The outlet shape was found to have 13% more emissions than the spiral, which caused vortices due to the helical grooves and protrusions inside the hole, resulting in the loss of flow energy due to the increase in frictional resistance. As a result of checking the drainage according to the size, when the hole size is small, the drainage of water is gradually progressed. When the hole size is large, the drainage is increased rapidly and it is confirmed that it is discharged in a short time. If the hole size is infinite, the effect of drowning is maximized, but it may affect the structural strength of combat equipment, so it should be considered when designing the size of the outlet. Drainage pumps can save the combat equipment from the risk of flooding for water inflows below a certain level. Therefore, when the drainage pump is maintained, the pump is maintained, the pump efficiency should be guaranteed by thorough inspection and performance test.