基于流化原理的气吹供种装置的设计与流场仿真

摘要

设计了基于固体流态化原理的气吹供种装置，并应用CFD软件Fluent 对种子流化室进行流场仿真，分析了供种装置流化室内距离布风板不同高度H的参考横截面和出口处流场的分布。结果表明：气流流场的不均匀性随距离布风板高度H的增加而减小；同时，由于壁面摩擦阻力的存在，近壁附近区域气体流速最小。仿真分析可为气力供种装置的优化提供理论支持。%Pneumatic seed supply device was designed which is based on the fluidization principle .The flow field in the fluid-bed of the seed was simulated by using the CFD software:Fluent , analyzing the field distribution of the reference planes at different distances between the gas distributor and the out plane .The simulated results indicated that the uni-formity of gas phase flow field in the reference planes was improved with the increase of the distance between the refer -ence plane and the gas distributor;as the same time , the velocity in the zone of near the wall is minimum , because of that the wall have friction .The study provides theoretical support to optimization design for the pneumatic seed supply de -vice .