Device and method for measuring real-time heat flux density of wall surface of combustion chamber

Abstract

The invention relates to a heat flux density measurement technology, in particular to a device and method for measuring the real-time heat flux density of a wall surface of a combustion chamber, and mainly solves the technical problems of long thermal response time, low measurement precision and incapability of real-time measurement in measurement of the wall surface of the combustion chamber in the prior art. The device comprises a combustion chamber wall, a measuring hole, a measuring assembly and a fixing and limiting assembly. Measuring holes are formed in the combustion chamber wall; thermocouples are arranged in the measuring holes; the thermocouples contacts with the bottom of the measuring holes; the thermocouples are sleeved with fixing sleeves, and limiting holes are formed in the thermocouple fixing plate. The thermocouple fixing plate is fixedly connected with the wall of the combustion chamber, the fixing sleeve is pressed and fixed between the outer wall face of the combustion chamber and the thermocouple fixing plate, and springs are compressed between check blocks and the thermocouple fixing plate. The fixing sleeves, the springs, the check blocks and the thermocouple fixing plate are combined to form a spring compensation type thermocouple fixing method. Meanwhile, the invention also provides a method for measuring the real-time heat flux density of the wall surface of the combustion chamber.

Description

technical field [0001] The invention relates to a heat flux density measurement technology, in particular to a real-time heat flux density measurement device and a measurement method for a combustion chamber wall surface. Background technique [0002] The gas temperature in the combustion chamber of the aerospace engine is as high as 3000K or more, and the working thermal environment in the combustion chamber is extremely harsh, which has high requirements for the thermal protection of the combustion chamber wall. The heat flux density of the combustion chamber wall is an extremely important physical quantity for evaluating the material of the combustion chamber wall. Accurately obtaining the real-time heat flux density of the combustion chamber wall can quantitatively evaluate the local heat transfer characteristics of the combustion chamber wall, and then guide the optimization of the thermal protection structure of the combustion chamber wall. Reflect the combustion state...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems that the heat flux density measurement method on the wall surface of the combustion chamber has a long response time and low measurement accuracy and cannot realize real-time measurement of the heat flux density on the wall surface of the combustion chamber in the prior art, and provides a real-time measurement method for the wall surface of the combustion chamber. Heat flux measuring device and measuring method

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