Application of inserts for suppression of coupled dynamic–acoustic effects during confined granular flow in silos

• We investigate ways to prevent coupled dynamic-acoustic effects during silo flow.
• We carry out laboratory tests with a perspex and steel model silo.
• We investigate silo flow of sand, polymer granulates and PET flakes.
• We elaborate an effective method for a reduction of dynamic-acoustic phenomena.

The paper discusses methods to prevent coupled dynamic–acoustic effects during silo flow by means of inserts. Laboratory tests were carried out with a perspex and steel model silo with different inserts along the wall. As bulk solids, sand, polymer granulate and PET flakes were used. An effective method for a reduction of dynamic–acoustic phenomena during silo flow was elaborated. It was verified in large metal silos.

Location of two internal convergent rings in real cylindrical metal silos proposed by authors (a = 1 × d, b = 2 × d, α ⩾ 35°, l = 0.075 × d)The paper discusses methods to prevent coupled dynamic–acoustic effects during silo flow by means of inserts. Laboratory tests were carried out with a perspex and steel model silo with different inserts along the wall. As bulk solids, sand, polymer granulate and PET flakes were used. An effective method for a reduction of dynamic–acoustic phenomena during silo flow was elaborated. It was verified in large metal silos.Figure optionsDownload as PowerPoint slide