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为了揭示叶片式抛送装置抛送玉米秸秆切碎段时内部复杂的气固多重耦合流动特性,使用计算流体力学软件fluent中的Eulerian模型对装置内部气固两相流场进行数值模拟。在高速摄像试验验证可行的基础上,对抛送装置的叶片数、叶片倾角及进料口物料体积浓度等参数对气固两相流场以及抛送物料的影响进行了数值分析,结果表明:4叶片较3和5叶片更有利于抛送物料;后倾10°叶片较前倾10°以及径向叶片更有利于抛送物料;进料口物料体积浓度变化仅改变整个区域物料分布浓度,对物料抛送速度影响不大。
In order to reveal the complex gas-solid multiple coupled flow characteristics when the blade throwing unit throws corn stalk shredded segments, the Eulerian model of computational fluid dynamics software fluent is used to simulate the gas-solid two-phase flow field inside the device. Based on the feasibility of high-speed camera test, the numerical analysis of the influence of parameters such as the number of blades, the inclination of blades and the material volume concentration at the inlet on the gas-solid two-phase flow field and the throwing material was carried out. The results show that: 4 blades are more conducive to throwing material than 3 and 5 blades; 10 ° backward inclination of the blade 10 ° forward and radial blade is more conducive to throwing material; feed inlet material volume concentration changes only change the distribution of material concentration in the entire region, Little impact on material throwing speed.