Testing device and method for erosion combustion simulation test of solid rocket propellant

Abstract

The invention provides a testing device for a solid rocket propellant erosion combustion simulation test, and the device comprises a closed combustion system which is used for providing a closed combustion environment with preset pressure for a propellant; the pressure control system is used for controlling the internal pressure of the closed combustion system to reach preset pressure; the airflow injection system is used for simulating multiphase airflow generated in actual work of the solid rocket engine and injecting the multiphase airflow to the surface of a propellant; and the optical measurement system is used for capturing and reconstructing combustion end face information and radiation information of flames in the combustion process of the propellant in the closed combustion system. The invention also provides a corresponding test method for the erosion combustion simulation test of the solid rocket propellant. According to the testing device and method, the airflow injection system is adopted to simulate the airflow of the solid rocket engine under the real working condition, so that a testing result closer to the real working condition can be obtained.

Description

technical field [0001] The invention belongs to the technical field of solid rocket propellant testing, and in particular relates to a solid rocket propellant erosion and combustion simulation test testing device and method. Background technique [0002] Solid rocket propellant is the power source of solid rocket motor. Erosive combustion is the phenomenon that when the solid propellant is burned in the combustion chamber, the high temperature gas generated will flow through the combustion surface of the propellant, resulting in an increase in the burning rate of the propellant. In order to improve the packing density of the propellant, the ratio of the channel area of ​​the central hole of the propellant to the area of ​​the nozzle throat is small, which is greatly affected by erosion and combustion. [0003] Erosive combustion will seriously affect the performance of the engine. Slight erosive combustion will affect the change of the combustion chamber pressure with time, ...

AI Technical Summary

Problems solved by technology

[0003] Erosive combustion will seriously affect the performance of the engine. Slight erosive combustion will affect the change of combustion chamber pressure over time, change the engine's expected thrust change law, and even damage the combustion chamber in severe cases, reducing the safety of the engine during operation. , the study of erosion combustion is of great significance to the design of cabinet rocket engines

However, the erosive combustion effect is produced by the interaction between the gas flow and the propellant, which is a multi-phase and complex process. Therefore, it is difficult to test the erosive combustion with the usual test devices and methods for propellant combustion.

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