Research On CFD-based Fluid Performance Study Of Environmental Reamer Device

Environmental protection is a critical test in the process of economic and socialdevelopment for our county, dredging project based on the purpose of environmentalprotection has become more and more attractive. Environmental dredging project isan integrated technology. Currently more popular environmental dredgingmachinery mainly contains engineering vessels supporting environmental reamerequipment. Based on this, According to the operating characteristics of dredgers andoperating modes of dredging equipment, this paper combines the needs of researchon dredging suction system dynamic matching of the vessel in the researchlaboratory, The research of environmental protection cutter device on fluidproperties analysis and the front-end structural design of test platformare developed as emphases.In the front-end structural design, this paper focus on one WaterwayEngineering Bureau under the long crocodile on the3rd cutter suction dredger asobject, combined with school lab actual design completion. According to the actualsituation to establish the length of the test bench knife, enhance power, beams, ropeand other materials of the motor.In the environmental reamer design, combined with relevant literature, thispaper has established mathematical model on reamer, setting the appropriateparameters Suitable for the engineering application. According to parameters ofcutter dredger designed reamer, this paper also has created a physical model of thereamer apparatus in specific environmental conditions based on Pro/E software.Finally, the environmental import cutter model has been led into Gambit to bemeshed and local grid refinement and smooth processing has been finished, and thenchecked the quality of the grid division. A high-quality mesh and CFD analysis canbe found through several attempts.This paper has completed the following works by CFD calculations: pressuredistribution has been obtained at different speeds, analyzed pressuresituation of cutter protective cover systematically, and puts forward suggestions formanufacturing of protective cover. By comparing the Y-Z plane velocity vector atdifferent speed, there is a waste of energy, inconformity with the principles ofengineering economics at20r/min. Under the hood body part of the fluid, thecentrifugal force is too large to be thrown off the case at60r/min, not meetenvironmental requirements. At40r/min, fluid flow smoothly in protection hood,fluid particle flow equal distribution outside the hood. Fluid particle has cleardirection away from the suction; there is a small amount of water flows into theprotective cover. On the current calculation results, the paper argues that40r/min isthe optimal rotate speed in this program design.