The article describes the experimental stand and the results of preliminary experiments confirming the effectiveness of the use of contact ultrasonic exposure for convective drying of moving flat textile materials. In the developed stand, ultrasonic exposure is provided by an ultrasonic vibration emitter, which allows creating an amplitude of oscillations of the working tool of at least 70±5 μm at a frequency of 22 kHz over the entire contact area of the dried textile material with radiating surface of ultrasonic oscillatory system. The stand is equipped with the necessary measuring equipment that allows you to control the change in the mass of the dried fabric, the temperature of the drying agent, the speed of movement of the textile material. Drying of materials is provided by two types of energy effect: thermal (the drying agent is air) and ultrasonic. The studies carried out at the stand made it possible to establish that the use of contact ultrasonic exposure with an amplitude of oscillations of 70±5 μm in addition to the thermal (60°C) effect allows to reduce the drying time by 27% until the same moisture content is achieved (in the studied range of moisture content). At the same time, an increase in the speed of movement of the fabric from 0.07 to 0.28 m/s and, accordingly, the number of its broaches and contact with ultrasonic emitter, also allows you to reduce the drying time by 27% (in the studied moisture content range).
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