Device and method for measuring concentration of high-pressure combustion carbon black particles

Abstract

The invention discloses a device and a method for measuring the concentration of high-pressure combustion carbon black particles. The device for measuring the concentration of the high-pressure combustion carbon black particles comprises a laser, a first attenuator, a light path collimation component, a first polaroid, a high-pressure sample chamber, a second polaroid, a focusing lens, a first optical filter, a linear array charge coupled device (CCD) image sensor and a computer. In the method, lasers with different wavelengths are successively emitted by the laser and pass through the high-pressure sample chamber, and the concentration of particles to be measured is obtained by measuring the light intensity of transmission light which passes through the high-pressure sample chamber and light which is taken as a reference light path and does not pass through the high-pressure sample chamber according to a Mie scattering theory. By the method, the concentration can be measured conveniently and quickly; the method has low requirements on instruments and equipment, the process of data acquisition and processing is simple, and the measurement range is relatively wider; moreover, measurement results are accurate, and the method is high in speed and repeatability, and can be popularized and applied in the field of particle measurement.

Description

technical field [0001] The invention relates to the technical field of particle concentration measurement, in particular to a measuring device and a measuring method for measuring the concentration of burning carbon black particles under high pressure conditions. Background technique [0002] Combustion is widely used in energy production, thermal power generation, home heating, transportation, aviation propulsion, and material processing. At the same time, the development of aerospace vehicles and various high-performance, low-pollution, high-intensity, and small-sized combustion devices has put forward higher and higher requirements for the study of combustion processes. The instability of the combustion state will lead to a decrease in the thermal efficiency of the combustion chamber and an increase in pollutants. In extreme cases, it may also cause fire extinguishing, or even induce an explosion in the combustion chamber, resulting in an accident. Therefore, the combus...

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Problems solved by technology

[0008] In recent years, a method of measuring particle concentration with dual wavelengths based on the light scattering method has been proposed. This method uses a laser to emit laser light with different wavelengths. The laser light emitted by the laser passes through the sample placed on the sample stage, and is measured by the measured light intensity data. Particle concentration, but this method laser can only measure the particle concentration in a single environment, and the particle state is unstable during the combustion process, which is easily disturbed and affects the accuracy of the measurement results, and the method is complicated and prone to errors

At present, no one has proposed relevant research reports on the measurement of particle concentration in high-pressure combustion

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