Экспериментальное исследование колебаний капли воды в потоке воздуха при акустическом воздействии

Abstract

The study focuses on the interaction between a gas flow and liquid drops and describes the proposed experimental setup in detail. First, we experimentally studied the vibrations of a drop with a diameter of 1.4 mm in the airflow with a speed of 3.1--10 m/s and by a high-speed Phantom camera with a frame rate of 2000 fps, we took a series of photographs of the drop in the airflow at regular intervals. Then, we calculated the spectra of free vibrations of the drop in a gas flow, as well as the vibrations affected by sound vibrations of the air with a frequency of 0--1000 Hz and a sound pressure level of 0--121 dB, and found the gas flow and acoustic radiation parameter regions, at which the drop vibrations amplitude is higher or lower. Next, by the Kelvin --- Helmholtz instability theory, we theoretically analyzed the airflow-acoustic radiation mutual influence on the liquid drop and considered the drop possible values of the Weber number under experimental conditions. Findings of the research show that the drop does not fragmentize in the airflow. Finally, we found the drop vibration frequency values in the airflow, at which the amplitude of oscillations is constant