Method and device for measuring temperature and heat flow distribution on internal face of combustion chamber

Abstract

The invention relates to a method and a device for measuring temperature and heat flow distribution on the internal face of a combustion chamber, and belongs to the field of temperature and heat flow measurement. The measurement device comprises the combustion chamber, a temperature sensor, a temperature sensor fixing device, a signal transmission line and a computer; the lateral surface of the combustion chamber is provided with a series of equidistant temperature measuring blind holes; the temperature sensor measures the temperatures of the bottoms of the blind holes so as to obtain a temperature output curve of each measure point; and then a certain value computational method is adopted to calculate the temperature and the heat flow distribution on the internal face of the combustion chamber. Due to adopting a proposal of measuring the temperatures of the blind holes, the method and the device solve the problems of high processing and mounting difficulties, inconvenient detachment and the like in the prior art; and the armored thermocouple temperature sensor with mature technology is adopted, so that the cost is low and the use is convenient. The method and the device can be used for measuring the temperature and the heat flow distribution on the internal face of a combustion device with an axial symmetry structure.

Description

【Technical field】 [0001] The invention relates to a measurement method and device for obtaining the temperature and heat flow distribution of the inner wall of a combustion chamber. The invention is especially used for obtaining the inner wall temperature and heat flow distribution of the axisymmetric structure combustion chamber of the rocket engine when it works stably. 【Background technique】 [0002] In the development process of rocket engine combustion chamber, in order to obtain good thermal protection effect, the heat transfer characteristics of the combustion chamber, that is, the distribution of inner wall surface temperature and heat flow, is one of the key investigation contents. [0003] In the research on the heat transfer characteristics of the combustion chamber, the heat capacity type combustion chamber structure is generally used, and the test time is set at a few seconds, and the temperature sensor device is used to measure the temperature and heat flow dis...

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Problems solved by technology

The problem to be solved in the present invention is to use a well-developed casing-type thermocouple to measure the temperature of the wall surface, and the thermocouple can be easily disassembled; a blind hole scheme is adopted in the body of the combustion chamber, and the temperature measurement point is located at the bottom of the hole to solve the problem. Difficulties in processing, installing and sealing the combustion chamber; adopt a thermocouple fastening device to realize the positioning of the thermocouple and make the temperature measuring head in close contact with the temperature measuring point; A data processing method to obtain the inner wall surface temperature and heat flow data

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