稀密两相状态监测实验平台设计

Experimental Platform Design for Dilute and Dense Phase Condition Monitoring

为了实际测量稀密两相对应的管道尺寸、风压和空气体积流量,设计了一个稀密两相状态监测实验平台。基于空气动力学理论和比例-积分-微分(PID)控制方法,将旁路调节系统应用到实验平台入口处,以控制管道入口空气体积流量,从而实现对物料稀密两相输送的实时监测与调控。该实验平台可实现稀密两相边界条件测试和流形稳定性分析等多项测试。最后,通过多次物料流形实验,验证了旁路调节系统在调控空气体积流量方面的有效性,以及气动测控系统维持物料流形的可行性。

This paper designs an experimental testing platform for monitoring both dilute and dense phase states.The platform is based on aerodynamics theory and PID control method,and uses the a bypass regulating device at the entrance of the testing platform.This device controls the air flow at the entrance of the pipe,enables real-time monitoring and regulation of the material’s dilute and dense phase transportation.The testing platform is capable to conduct various experimental tests,including tests on dilute and dense phase boundary conditions and flow stability analysis.Finally,the feasibility of using the bypass regulating device to control air flow and the measurement and control system to maintain material flow form is verified through experiments.This paper provides theoretical support for pneumatic conveying equipment for bulk grain and offers strong support for the training of innovative talents.