On-line particle size measurement and simultaneous collection system for micro-nano particles in multiphase flow

Abstract

The invention discloses a system for on-line particle size measurement and synchronous collection of a micro-nano particle in a multiphase flow, and belongs to the field of on-line particle size measurement and synchronous collection of micro-nano particles in multiphase flows of solid-propellant rocket engines. The system comprises a collection air channel, a flow divider, a high-pressure metal hose and a pressurizing barrel, wherein the flow divider divides pressurized liquid into multiple ways to be respectively supplied to fan-shaped spray heads; the high-pressure metal hose is used for transport of high-pressure liquid; the pressurizing barrel is used for storing and pressurizing sprayed liquid; and the collection air channel is used for collecting the micro-nano particle in the high-temperature and high-rate multiphase flow in a solid engine plume for the sprayed liquid. The system can realize the on-line particle size measurement and the synchronous collection of the micro-nano particle in the multiphase flow, and has the following advantages that the high-speed sprayed micro-nano particle in the multiphase flow can be rapidly decelerated, so that bombardment of the high-speed particle on a wall surface of equipment can be avoided; the sprayed high-temperature particle in the multiphase flow can be rapidly cooled, so that secondary reaction caused by contact of the high-temperature particle and outside gas can be avoided; and sufficient particles in different particle sizes and states can be collected.

Description

technical field [0001] The invention belongs to the field of on-line particle size measurement and synchronous collection of micronano particles in multiphase flows of solid rocket motors, and relates to an online particle size measurement and synchronous collection system for micronano particles in multiphase flows. Background technique [0002] In the test of aluminum-containing propellants for solid rocket motors, since the collision process of particles inside the nozzle cannot be described and the real situation of the combustion chamber cannot be completely simulated, in order to test the combustion and agglomeration of aluminum particles in the propellant, the injection nozzle is often tested. The particle size of the residue particles in the gas multiphase flow of the pipe is used as a reference. The commonly used testing equipment is a laser particle size analyzer. When the engine is actually working, the exit velocity of the nozzle can reach more than 1km / s. Due to ...

AI Technical Summary

Problems solved by technology

The gas ejected by the solid engine has the characteristics of high temperature and high speed, and it is easy to spray and adhere to the surface of the equipment, so it is difficult to collect. At present, there are few methods for collecting particles in the gas related to this situation.

Images