Engine internal flow field measuring system and measuring method thereof

Abstract

The invention discloses an engine internal flow field measuring system and a measuring method thereof. The method comprises the steps of preparing a grain of a solid rocket engine through employing aradioactive isotope raw material, generating a large amount of high-speed high-temperature fuel gas after the grain is ignited to form a flow field, generating plume through the spraying of a sprayingpipe, and enabling radioactive isotope particles to release gamma rays when the radioactive isotope particles flow along with the flow field, and using the gamma ray dynamic collector for collectingreleased gamma rays to measure the dynamic characteristics of the internal flow field of the solid rocket engine. The measuring system uses radioactive isotopes as tracer particles to achieve non-contact measurement of the internal flow field of the solid rocket engine, and compared with a traditional measuring method, the original structure of the solid rocket engine does not need to be damaged,the problem that a traditional measuring method disturbs an internal flow field can be avoided, and compared with an existing numerical calculation method, the defect that the numerical calculation result is insufficient in accuracy can be overcome.

Description

technical field [0001] The invention relates to the technical field of solid rocket motor measurement, in particular to a measurement system and a measurement method for the internal flow field of a solid rocket motor. Background technique [0002] Solid rocket motor is a kind of rocket motor, which has been widely used in the propulsion system of missiles, launch vehicles and space vehicles. [0003] By measuring the internal flow field of the solid rocket motor, it is possible to judge whether the design of the engine is reasonable, whether the charge can burn normally, and whether the charge meets the quality requirements. This is of great significance for optimizing the structural design of the engine and improving the performance of the engine. [0004] Most of the traditional measurement methods measure the internal pressure of solid rocket motors at multiple points to indirectly calculate parameters such as engine thrust, grain burning velocity and flow coefficient. T...

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Problems solved by technology

[0007] In view of this, the present invention provides a measurement system and measurement method for the internal flow field of the engine, which are used to overcome the lack of accuracy of numerical calculation results and avoid the disturbance of the internal flow field by traditional measurement methods

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