Numerical Simulation and Experiment on the Adsorption Seeds Properties of Air-Suction Peanut Seed-Metering Device
Special Issues Editor (Nottingham Tent University, United Kingdom (Great Britain))
In this paper we design an air-suction seed-metering device. Facilities used and steps included: i) Numerical Simulation equations, ii) standard k-E turbulence model and the SIMPLE numerical calculation method, iii) these were applied to calculate the velocity and vacuum pressure fields in a gas chamber of the seed-metering device, iv) Computational Fluid Dynamics (CFD) software. The effect of the vacuum pressure, nozzle diameter and rotating speed on the performance of seed-metering device were analyzed by bench testing. The simulation and testing results show that: i) at the entrance of the gas chamber, the velocity and the vacuum pressure are highest, ii) the velocity and the vacuum pressure of adsorption seed area are slightly larger than of metering seed area, and iii) the distribution is relatively uniform, which is favorable for the seeds in adsorption area and placing the seed in metering area. With the decreased in vacuum, the qualified index and the multiples index showed a downward trend, and the leakage index showed an upward trend. With the increased nozzle diameter, the adsorption seeds ability is to improve, and leakage index is to decline. When the nozzle diameter is larger than 5.0mm, the performance of the adsorption seeds is decreased with the increase in nozzle diameter. With the increased rotation speed of the seed-metering device, the performance of the adsorption seeds is gradually increased and then decreased. When the rotation speed is 92r/min, it was still able to meet the requirements of the adsorption seeds performance. In conclusion, the study: i) proved the distribution of the gas chamber flow field of the seed-metering device, and ii) the influence of related factors of the adsorption seeds performance, and iii) provided the technical basis and reference for the optimum design of the seed-metering device.
Journal: International Journal of Simulation: Systems, Science & Technology, IJSSST V17
Published: Jul 14, 2016