Working characteristic of silo ejector

Considering the problem of silo design,the silo ejector model and ejector function were proposed. The properties of the static pressure matching function were studied. The critical conditions and ranges of the engine total pressure,the cross-sectional area of the silo and the outlet pressure of the mixing chamber were analyzed. This proved impossible to achieve the first limit of ejector,the zero points of the cross-sectional area of secondary flow and the constant velocity point; when the third limit of the ejector was not reached,the characteristic curve was subjected to the static pressure matching function; when the state of the ejector ranged from the third limit to the minimum limit,the characteristic curve was subjected to the optimal static pressure function; when the ejector worked in the over-congestion state,the characteristic curve was subjected to the minimum static pressure function. The results provide an important guidance for the design of silos and ejectors.