Authors

Abstract

In order to analyze the internal flow field of the shiitake mushroom shank pine forming chamber and improve the chamber based on the flow field analysis, this paper applies the computational fluid dynamics software FLUENT to numerically simulate the internal flow field of the shiitake mushroom shank pine forming chamber of the shiitake mushroom shank pine forming machine, thus visualizing the flow field characteristics and flow state in the chamber of the mushroom forming machine and realizing the visualization of the flow field of the pine forming chamber. Then the wind speed values obtained from the simulation and the experimental values were compared, and the average relative error between the two was less than 10%. Finally, according to the flow field simulation results, the flow field inside one air inlet and two air inlets were analyzed, and then the blade structure, outlet area parameters, and speed parameters were compared and optimized. Analysis of the results: The pressure distribution of the flow field inside the pine forming chamber and the velocity distribution of the internal flow field were obtained, and based on the simulation results, two air inlets with a speed of 2000 r/min and an outlet area of 160×80 mm2, the pine forming chamber under the parameters and structure of the new blade has greater turbulent kinetic energy and velocity gradient, which is more favorable to the discharge, and provides a basis for further optimization and improvement of the pine forming machine.

Abstract in English

为了对香菇柄成松室进行内部流场分析以及根据流场分析结果对成松室进行改进，本文应用计算流体力学软件FLUENT对香菇柄成松机成松室的内部流场进行数值模拟，从而直观显示了成松机腔体内的流场特性和流动状态，实现了成松室流场的可视化。然后对仿真所得的风速值和试验测得的值进行对比，得出二者平均相对误差小于 10%，最后根据流场模拟结果，对一个进风口和两个进风口内流场进行分析，然后对刀片结构，出料口面积参数，转速参数进行对比模拟分析优化。结果分析:得到了成松室内流场的压力分布和内部流场速度分布，并依据仿真结果得到两个进风口，转速为2000r/min，出料口面积为160×80 mm2，新型刀片的参数与结构下的成松室具有更大的湍动能和速度梯度，更有利于出料，并为成松机的进一步优化改进提供基础。