ANALYSIS AND IMPROVEMENT OF SINGLE-PHASE FLOW FIELD INSIDE THE CRUSHING CHAMBER OF MACHINE FOR LENTINUS EDODES STIPE CRUSHING

In order to analyze the flow field inside the crushing chamber of machine for lentinus edodes stipe crushing and improve performance of the machine based on the results of the flow field analysis, this paper applied the computational fluid dynamics software FLUENT to numerically simulate the flow field inside the crushing chamber of the machine for lentinus edodes stipe crushing. Thus, the flow field characteristics and flow state inside the crushing chamber were intuitively displayed, and the visualization of the flow field in the crushing chamber was realized. Then, the wind speed value obtained by simulation was compared with the value measured by experiment, and the average relative error between them was less than 10%. Finally, according to the simulation results of flow field, the flow field generated by one air inlet and two air inlets was analyzed, and then the blade structure, outlet area parameters, and rotation speed parameters were compared, simulated and optimized. Results analysis: the pressure distribution and velocity distribution of the flow field inside the crushing chamber were obtained, and the optimal structure and parameters were two inlets, the rotation speed of 2000 r/min and the outlet area of 160×80 mm2, the crushing chamber with the new blade parameters and structure had greater turbulent kinetic energy and velocity gradient, which was more favorable to the discharge, and provided a basis for further optimization and improvement of the crushing machine.