Simulation and optimization design and experiment of airflow field in safflower picking chamber
(1. College of Mechanical and Electrical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China; 2.School of Automation， Beijing Institute of Technology, Beijing 100081, China)
Abstract：To improve the collection efficiency and quality of safflower silk after picking, the airflow field in the picking chamber of portable counter roller safflower harvester was optimized. The relationship between the diversion holes in the picking chamber of safflower harvester and the trajectory of safflower filaments was investigated, and a gassolid twophase flow distribution model of the safflower harvester was established based on the Fluent fluid simulation software. The boundary conditions and the model parameters were determined based on the measured data of safflower harvester，and the distributions of airflow field under different parameters of diversion holes were obtained. The verification test under the same conditions as the simulation was designed, and the highspeed camera and the test equipment were used to verify and analyze the simulation results. The test conclusions and simulation results show that the preferred parameters of the safflower picking chamber are determined with diversion hole diameter of 6 mm, diversion hole number of 3, vertical diversion hole arrangement and distance between the diversion holes of 15 mm. For the preferred parameters, the flow velocity of airflow field in the picking chamber is stable, and the filament trajectory is relatively consistent with high filament collection efficiency.
