Test device for studying distribution of plume condensed-phase particles of spray pipe

Abstract

The invention provides a test device for studying distribution of plume condensed-phase particles of a spray pipe. The device comprises a fuel gas generator and a particle collection device, wherein the fuel gas generator comprises a combustion chamber, a convergence section and a spray pipe; the end surface of the particle collection device is provided with an air inlet; plume sprayed from the spray pipe can completely enter the particle collection device through the air inlet on the end surface of the particle collection device; vent holes are arranged around the air inlet; a filter screen is arranged in each vent hole; and the aperture of the filter screen is less than the particle size of the condensed-phase particles. The test device provided by the invention can stimulate practical high-temperature high-pressure environment in an engine and conveniently replace the convergence section and the spray pipe so as to adjust the convergence angle of the convergence section; and moreover, by selecting different throat diameters and structural types of the spray pipe, the test device can separately study influence of the particle phase concentration, working pressure, spray pipe structural type and other factors on the particle size distribution of the condensed-phase particles.

Description

technical field [0001] The invention relates to the field of engine tests, in particular to a test device for studying the distribution of condensed phase particles in nozzle plumes. Background technique [0002] Modern solid rocket motors widely use aluminum-containing propellants, and the gas contains a large amount of Al2O3 particles. The size and distribution of condensed phase particles are important initial parameters for engine performance analysis and working process simulation. For example, the mechanical erosion effect of condensed phase particles on the throat lining material and the particle heat increment effect will aggravate the ablation of the throat lining material, making it appear The step effect will cause the nozzle to burn through in severe cases. In addition, during the flight of the carrier aircraft, the plume has strong infrared radiation characteristics and becomes the target of military reconnaissance, and the infrared radiation characteristics of...

AI Technical Summary

Problems solved by technology

Due to the high cost of solid rocket motor ground test and missile flight test, researchers still lack understanding of the particle distribution in the solid rocket motor nozzle and its plume. One of the important reasons is the lack of effective test devices

Images