Hydraulic Properties Research Based On The CFD Of Fire Water Cannon

In recent years, with the rapid development of our country’s national economy and theimproving of the science and technology level, especially the rapid development ofurbanization, many large space buildings arise at the historic moment, all sorts of largespecification of the airport and large warehouse etc. large fire place increasing, which putforward higher request to the performance of the fire water cannon. From the computationalfluid dynamic and numerical simulation two aspects research the fire water cannon structuralparameters on its influence on the performance of jet, have great significance to design a newgeneration of the fire water cannons and improve the performance of the fire water cannon.Considering the difference between the fire water cannon jet and the solid flight, accordingto the breakup theory, analysis the structure and the factors affecting the stability of the firewater cannon jet. Research the fire water cannon jet broken way and process, build themathematical model which can descript the fire water cannon jet broken procedure.Combined using the basic conservation equation of fluid motion and the Turbulencecontrol equations established the control equations of the fire water cannon flow field, use thefinite volume method discrete the control equations, special treat the calculation domain of wallsurface. Use standard model numerical simulate the fire water cannon flow field.Through the numerical simulation of the flow field of the fire water cannon muzzle,research the influence of the tube diameter, contract angle, the ratio of large diameter and smalldiameter, the length of rectifier tube and the inlet pressure on the performance of fire watercannon jet. Obtains the structure parameter which makes the fire water cannon performs best.Through the numerical simulation of the flow field of the bend tube which is the mainpart of the fire water cannon main structure, research the influence of the curvature radius oftube bended, the diameter of tube and the section shape of tube on the transmissionperformance of bended tube. Obtains the structure parameters which makes the bended tubeperforms best.