Ceramic matrix composite flame tube with air inlet hopper
A technology of composite materials and flame tubes, which is applied in the field of aero-engines and can solve problems such as thermal expansion mismatch
Active Publication Date: 2022-07-26
AECC SHENYANG ENGINE RES INST
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Problems solved by technology
When the ceramic matrix composite flame tube is connected with the metal shroud and the metal fixing ring, axial and radial ring groove gaps are reserved between the connection structures, so that there are certain gaps between the inner and outer walls of the flame tube in the hot and cold states. A wide range of free activity space, solve the problem of thermal expansion mismatch between ceramic matrix composites and metal materials, and alleviate the difference in size between cold and hot states
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[0032] In order to make the objectives, technical solutions and advantages of the implementation of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. Throughout the drawings, the same or similar reference numbers refer to the same or similar elements or elements having the same or similar functions. The described embodiments are some, but not all, embodiments of the present application. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present application, but should not be construed as a limitation to the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present...
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Abstract
The invention belongs to the field of aero-engines, and particularly relates to a ceramic-based composite material flame tube with an air inlet hopper, the ceramic-based composite material flame tube is fixed in a floating and post-positioning mode, and the situation that the ceramic-based flame tube is damaged due to the fact that the expansion amount of the flame tube is not matched is prevented; and the post-fixing mode is also beneficial to improving the temperature field quality of the combustion chamber. When the ceramic-based composite material flame tube is connected with the metal flow guide cover and the metal fixing ring, axial and radial ring groove gaps are reserved between the connecting structures, so that the inner wall and the outer wall of the flame tube have a free movement space within a certain range in the cold and hot states, and the problem that the ceramic-based composite material is not matched with the metal material in thermal expansion is solved; and the cold and hot size difference is relieved.
Description
technical field [0001] The application belongs to the field of aero-engines, and particularly relates to a ceramic matrix composite flame tube with an air intake hopper. Background technique [0002] High thrust-to-weight ratio aero-engines are the basis for the development of advanced military aircraft. Increasing the turbine inlet temperature of the engine and reducing the structural weight are the main ways to improve the thrust-to-weight ratio. In order to ensure combustion performance, the proportion of combustion air needs to be greatly increased, and the proportion of cooling air is reduced. At the same time, under the condition that the distribution of cooling gas is reduced and the quality of cooling gas is degraded in the high temperature rise combustion chamber, it is also required to further maintain or even improve the durability of the flame tube. In order to meet the above requirements, in addition to the use of advanced flame tube wall cooling technology, it ...
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IPC IPC(8): F23R3/42F23R3/60
CPCF23R3/42F23R3/60
Inventor 迟雪万斌李美烨常峰
Owner AECC SHENYANG ENGINE RES INST