关键词: 悬浮力, 压力损失, 最小输送速度, 能量消耗, 气力输送系统

Abstract:

To save energy and improve the operation performance, a new pneumatic conveying system was proposed herein, where soft fins of free oscillation were mounted in a horizontal plane through the pipe axis in the front of inlet. The particles had larger suspension force because of fin's oscillation, then the energy was used to accelerate the particles as far as possible, so that the pneumatic conveying system can safely work in lower air velocity. In order to analyze suspension action of the soft fin, PIV(particle image velocimetry)  technology was used to measure the vertical component of particle velocity and particle visualization images. And then energy-saving effects of fin were verified from the pressure drops, minimum and critical  velocities and power consumption.

Key words: suspension force, pressure drop, minimum and critical velocity, power consumption, pneumatic conveying system