Measuring method of burning rate of thermocouple for wall-mounted pouring medicine

Abstract

The invention belongs to the technical field of solid fuel ramjet engines, and in particular relates to a method for measuring the burning rate of a thermocouple used for wall-mounted pouring medicine. The measurement method uses a thermocouple, and the welding spot of the head is penetrated into a certain position in the powder column. When the burning surface moves and touches the head of the thermocouple, the thermocouple outputs a temperature rise signal, thereby obtaining the change time between the position of the burning surface and the ignition , to get the moving velocity of the burning surface at this position. The invention has the advantage of using the thermocouple as the target line measurement, which solves the difficult problem of poor reliability in the measurement of the burning surface burning velocity of the charge of the solid fuel ramjet engine. Design integral thermocouple target line measuring rake, easy to install, simple in structure and reliable in use. It effectively realizes the measurement of the law of the burning surface of the wall-attached charge.

Description

technical field [0001] The invention belongs to the technical field of solid fuel ramjet engines, and in particular relates to a method for measuring the burning rate of a thermocouple used for wall-mounted pouring medicine. Background technique [0002] During the working process of the solid fuel ramjet engine, the incoming high-speed air flow passes through the compression surface of the intake port and the shock wave system is decelerated and pressurized into the combustion chamber and then flows through the surface of the powder column. The powder is heated and decomposed and mixed with air to burn and release heat. After the gas flows through the supplementary combustion chamber for further combustion and heat release, it is finally accelerated out of the engine through the nozzle to generate thrust. Therefore, in order to obtain the performance of the solid fuel ramjet engine, it is necessary to conduct a ground test on a direct-connected test bench. Simulate the cor...

AI Technical Summary

Problems solved by technology

The reliability of the original target line scheme is low. The main problem of the first one is whether the target line can accurately transmit the fusing signal when the flame burns to the front.

Due to the turning of the target line, the approach loops are very close together, and the burning temperature of the flame is very high. It is possible that the target line after the turning point will be melted together, or the plasma field in the flame will conduct electricity, making the loop conductive and unable to return normally. Signal

The problem with the second solution is the opposite. The reliability of the plasma conduction on the burning surface needs to be verified. Whether it can conduct the conduction back to the channel signal or the power supply may be unstable, and the signal cannot be recognized.

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