Maze-type Emitter Emitter Numerical Simulation And Rapid Prototyping And Manufacturing

The drip irrigation is a new theory and new technology of the water of high utility of contemporary agriculture of rising, play a strong role to worldwide agricultural modernization. In the development of drip irrigation emitters which are the key parts of water-saving facilities, there are some problems: the cycle of traditional development for emitters is very long and the flow field inside the labyrinth channel is rather chaotic with lot of vortices, stagnant and low velocity regions etc. existing in the channel, because of its tiny structure, and there is still no established theory to instruct the design of labyrinth channel. These problems will limit the proprietary development of drip irrigation emitters. In this paper, Computational Fluid Dynamics (CFD) for various kinds of small channels and Rapid Prototyping Manufacturing (RP&M) are combined to establish a rapid development platform for new emitter products.Aiming at the flow behaviors in various labyrinth channels, FLUENT based on Computational Fluid Dynamics (CFD) is used to decode the unknown quantity of channel flow behaviors. Visualized pressure and velocity vector graph of the channels obtained by FLUENT which can fully reveal the flow behaviors in labyrinth channels. And Offer theoretical basis and guidance for research of irrigation emitter of high performance.In order to resolve the clogging problem of emitter from structure design, this paper calculates the roundly direct channel, squarely straight channel and 90 degree crooked channel. Thereby we verified the feasibility of numerical simulation to various kinds of small channels. Then the text calculates the traditional trapezoid and circular-type labyrinth channel separately, and visualizes the distribution of pressure and velocity vector graph in labyrinth channels. On this basis, the anti-clogging mechanism is analyzed. Aiming at lot of vortices, stagnant and low velocity regions in labyrinth channels, the trapezoid and arc labyrinth channel are corrected and optimized on the principle of reducing the area where no fluid passes through and avoiding the occurrence of vortices, stagnant and low velocity regions based on the calculated streamlines. Calculation indicates that the new design can effectively eliminate the vortices and stagnant regions, enable the velocity profile to be more uniform, and enable the tiny impurity to be carried out the channel. Thus the structure in the stagnant areas is optimized to enhance the anti-clogging characteristic of the channels.This text uses Pro/Engineer and RP technology to carry on the design and manufacture of Drip irrigation emitter finally. Not only can realize the fast development of the new products, but also realize the system integration to the prototype design and manufacture. And the laser rapid prototyping system possesses the function of making prototype and machine components fast, accurately. Thus it can carry on appraising fast, revising and function to test in Drip irrigation emitter.