4 results about "Particle combustion" patented technology

This invention relates to the field of organic solid fuel combustion technology and discloses a method for predicting the amount of particulate matter generated during solid fuel combustion. The method involves: performing component analysis on the solid fuel; predicting the release concentration in the gas phase of the solid fuel combustion, the concentration of reduction reaction products, the particle size distribution curve of easily broken mineral particles after breakage, the particle size distribution curve of fuel particles after breakage, and the particle size distribution curve of intrinsic minerals after fuel particle combustion; generating source terms based on the predicted data; inputting the source terms into a group equilibrium model; outputting the particle size distribution curve of the particulate matter after the combustion reaction; and predicting the particulate matter emission amount based on the output particle size distribution curve. This method solves the technical problem that existing research on the generation of particulate matter from organic solid fuel combustion lacks a means to predict the generation of particulate matter from organic solid fuel combustion.

The application discloses a mechanism model and method for pure boron combustion under high-temperature and high-pressure working conditions, and the model comprises an ICCD transient spectrum measurement system and a shock tube system; the shock tube system comprises a driving section, an experimental section and a diaphragm; the diaphragm is arranged between the experimental section and the driving end for separating the driving gas and the experimental gas, and the end of the experimental section is connected with the transient spectrum measurement system; an adjustable support rod is arranged at the end cover of the driving section; the method comprises the following steps: S1, using a boron particle combustion reaction mechanism device based on ReaxFF-MD to carry out an ignition experiment on boron powder; S2, calculating the meteorological reaction of the boron particle combustion reaction of ReaxFF-MD; S3, obtaining the MD simulation diagram of cluster combustion, the kinetic analysis result of the new reaction, the result of experimental verification and the reaction mechanism analysis result; the application solves the problem that the boron powder fuel has high volume and mass heat values, but the oxidation layer on the surface of the boron powder hinders ignition, and the high melting and boiling point properties of the boron powder limit combustion.

The application discloses a numerical calculation method for simulating iron powder particle cloud combustion considering differential diffusion, and belongs to the field of iron powder combustion numerical simulation calculation. The application can numerically simulate 2D free propagation of a flame of an iron powder particle cloud under microgravity conditions considering differential diffusion. For the difference of thermal diffusion rates among gas phase components, the application considers the effects of surface reaction kinetics and diffusion control mechanism in the self-established iron powder particle combustion model, calculates a local Lewis number in real time, corrects a diffusion term in a gas phase component equation, quantitatively analyzes the effects of differential diffusion on the flame temperature and flame propagation speed of the iron powder particle cloud, and the effects of differential diffusion on the heat release rate of single particle combustion and the oxygen mass fraction of a particle surface, and further considers the effects of oxygen concentration and thermal expansion on the iron powder particle cloud combustion. The application has guiding significance for developing a lean fuel iron flame model with low flame propagation speed and other metal particle combustion models.

The present application relates to solid propellant combustion technology, aiming at providing a lattice Boltzmann simulation prediction method for aluminum-based solid propellant combustion agglomeration. It comprises: using LBM method for solid propellant combustion process simulation and aluminum particle agglomeration behavior research, through mesoscale numerical simulation of solid propellant combustion process quantitative calculation and prediction, using the statistical physics principle of LBM to couple multiple field distribution, realize the simulation of complex aluminum particle combustion. The present application can more naturally simulate the drag force, thermophoretic force and other effects of particles in fluid, and is closer to the physical reality; can realize the reduction of calculation complexity, realizes the efficient simulation of tens of thousands of aluminum particle agglomeration process, significantly improves the calculation efficiency of large-scale particle system simulation; can deeply reveal the internal mechanism of pressure, burning rate, particle size, oxidizing gas concentration and other factors affecting agglomeration; realize the coupling of multiple physical fields, and truly reflect the complex environment in the combustion chamber.