High temperature-pressure radiation heat flow meter

Abstract

A heat flow meter of wall pure radiation heat flow in high temperature-pressure environment is characterized in that a sapphire crystal window is adopted for insulating the influences of convection and heat conducting, and a heat flow meter which determines radiation heat flow by measuring axial thermoelectric force of a heat absorption cylinder is adopted. The adopted sapphire crystal window is in single-sided convex structure which can effectively expand measurement visual angle, accurate design is carried out on a round window chamfer angle, thus further expanding the measuring angle of the radiation heat flow meter to be 150 degrees. The sapphire crystal window insulates the influences of two heat flows of convection and heat conducting to make the heat flow meter measure radiation heat flow only. The lower surface of a heat receiver is provided with a cooling construction to cool the lower surface thus causing the heat receiver to form stable axial temperature distribution, and the pure radiation heat flow of wall is obtained by measuring the temperature difference of the upper surface and the lower surface of the heat receiver.

Description

technical field [0001] The invention relates to a measuring device for the radiation heat flow of a combustion chamber, which can measure the radiation heat flow of the wall surface in the high-temperature and high-pressure environment of the combustion chamber of an aviation gas turbine. Background technique [0002] With the development of modern aviation technology, the gas temperature in the combustion chamber can reach 2000°C or even higher. In order to prevent damage to the flame tube and increase the service life, a more reasonable and efficient cooling design must be adopted to ensure that the wall temperature of the flame tube is within the allowable range of the material. This means a better understanding of the heat transfer processes in the combustion chamber wall cooling. For most cases, a large part of the heat transfer from the hot gas to the wall in the main combustion zone of the combustion chamber is radiation heat transfer. In the case of very effective g...

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Problems solved by technology

In addition, the size of the measurement angle of view will also directly affect the ratio of the actual measured radiation heat flow to the radiation heat flow from all directions in the real situation, and then directly affect the measurement accuracy of the radiation heat flow

Judging from the currently published literature, the heat flow meters used are mainly contact heat flow meters that mainly measure heat conduction heat flow, and heat flow meters that directly measure radiation heat flow are basically not found.

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