A method and device for controlling jet breakage and droplet generation

Abstract

The invention provides a method and a device for controlling jet breakup and liquid drop generation. Physical quantity disturbance with the same time domain characteristics as control signals is produced by specific control signal compilation based on a jet instability dominant mechanism to act on jet, the jet breakup process and the coalescence process of main liquid drops and satellite liquid drops are controlled, and controllable preparation of each liquid drop in a continuous liquid drop sequence is achieved. The device comprises a disturbance signal generator and a disturbance component,wherein the disturbance signal generator is used for setting or inputting dynamic disturbance signals with the characteristic of uneven distribution of fluctuation energy; the disturbance component isconnected with the disturbance signal generator to generate fluctuation with synchronous time domain characteristics and act on the continuous segment fluid jet in a non-contact manner, so that the size and distance of the single liquid drop produce by breakup and breaking of the continuous segment fluid jet are controllable, and controllable preparation of the single liquid drop in the continuous liquid drop sequence is realized.

Description

technical field [0001] The invention relates to a droplet generation method, more specifically, the invention relates to a method and device for controlling jet breakage and droplet generation. Background technique [0002] The use of jet fracture to produce droplets is currently a major technical approach for droplet preparation, and has been used in many practical applications in recent years, such as printing, particle sorting, pellet preparation, liquid dispersion, synthetic fiber spinning, biochemical Analytics, fuel injection, hydraulic mining and processing, and more. For the present work, the most important of which are printing and particle sorting, the high-fidelity production process requires synchronized sequences of droplets of the same size and shape. [0003] Continuous jet instability fracture is a typical flow instability process, which includes typical physical processes such as disturbance occurrence, disturbance propagation, disturbance growth, interface...

AI Technical Summary

Problems solved by technology

This type of method has a much wider range of control over the droplet size than the previous method, but still has certain disadvantages, such as the droplets need to fly a long distance to merge, which leads to a bulky device.

In addition, whether it is the first method or the second method, the effect is that it can only produce droplets of uniform size. If it is necessary to produce droplets of different sizes, it is often necessary to replace the jet nozzle

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