Acoustic wave drying method

摘要

A method for drying a material using an acoustic wave drying including an acoustic resonant chamber that imparts acoustic energy to transiting air received from an airflow source. The acoustic resonant chamber includes a primary air channel having side surfaces connecting an air inlet and an air outlet, the primary air channel having a primary air channel length between the air inlet and the air outlet. One or more secondary closed-end resonant chambers are formed into side surfaces of the primary air channel. An air impingement airstream containing acoustic energy exits the air outlet and impinges on the material.

主权项

1. A method for drying a material, comprising:
receiving air from an airflow source into an air inlet of an acoustic resonant chamber; directing the received air out of the acoustic resonant chamber through an air outlet onto the material which is spaced apart from the outlet by a gap distance; wherein the acoustic resonant chamber includes:
a primary air channel having side surfaces connecting the air inlet and the air outlet, the primary air channel having a primary air channel length between the air inlet and the air outlet; andone or more secondary closed-end resonant chambers formed into a side surface of the primary air channel, the secondary closed-end resonant chambers having side surfaces and secondary resonant chamber lengths; wherein an acoustic pressure provided at a surface of the material is at least 125 dB-SPL, and wherein the air directed onto the material impinges on the surface of the material with an air velocity of no more than 40 m/s.