Double-walled small elbow structure for return combustion chamber and return combustion chamber
A backflow combustion chamber and double-wall technology, applied in combustion chambers, continuous combustion chambers, combustion methods, etc., can solve the problems of easy ablation of small curved pipes and low cooling efficiency of small curved pipes, and achieve increased cooling efficiency and effective Protect and enhance the effect of heat transfer
Active Publication Date: 2022-03-25
AECC HUNAN AVIATION POWERPLANT RES INST
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Problems solved by technology
[0006] The double-walled small elbow structure and the return combustion chamber provided by the present invention solve the technical problems that the cooling efficiency of the small elbow in the existing return combustion chamber is low and the small elbow is easy to be ablated
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[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered below.
[0027] figure 1 It is a schematic structural view of the double-walled small elbow structure for the return combustion chamber of the preferred embodiment of the present invention; figure 2 It is a structural schematic diagram of the recirculation combustion chamber of the preferred embodiment of the present invention.
[0028] Such as figure 1 As shown, the double-walled small elbow structure 10 for the return combustion chamber of this embodiment includes the inner wall 21 of the elbow and the outer wall 22 of the elbow arranged at intervals, the outer wall 22 of the elbow is arranged on the outside of the inner wall 21 of the elbow and An intermediate cavity 23 is formed between the outer wall 22 of the elbow pipe and the inner wall 21 of the elbow pipe, and...
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The invention discloses a double-walled small elbow structure for a return combustion chamber and the return combustion chamber, which comprise the inner wall of the elbow and the outer wall of the elbow arranged at intervals, the outer wall of the elbow is arranged on the outer side of the inner wall of the elbow and makes the elbow An intermediate cavity is formed between the outer wall of the pipe and the inner wall of the elbow, the inner wall of the elbow is provided with a first impact hole, and the wall body on the first side of the outer wall of the elbow is provided with a hole penetrating through the outer wall of the elbow for making the outer wall of the elbow The air film hole on the outside is connected to the middle cavity, and a part of the cold air flow flowing into the middle cavity flows out from the air film hole and is attached to it under the joint action of the diversion effect of the outer wall of the elbow and the impact of the high-temperature gas flow on the outer wall of the elbow. The outer wall surface attached to the outer wall of the elbow flows to form a cold air protective film on the outer surface of the outer wall of the elbow; at the same time, another part of the cold air flowing into the middle cavity flows along the middle cavity to the second side of the outer wall of the elbow. Outflow. The double-walled small elbow structure used in the return flow combustion chamber of the present invention is not easy to be ablated.
Description
technical field [0001] The invention relates to the technical field of gas turbine engines, in particular to a double-walled small elbow structure for a recirculation combustion chamber. The invention also relates to a recirculation combustion chamber comprising a double-walled small elbow structure for the recirculation combustion chamber. Background technique [0002] The speed of small and medium gas turbine engines is very high. In order to avoid rotor dynamic problems, the compressor and turbine must be compactly arranged to shorten the wheelbase. In order to organize efficient combustion in a limited space, the annular recirculation combustion chamber is used in small and medium gas turbine engines. is widely used in. [0003] As a unique structure on the return combustion chamber, the small elbow is an important temperature-bearing component in the return combustion chamber. Together with the inner ring of the flame tube and the inner casing, it forms the inner two c...
Claims
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IPC IPC(8): F23R3/54F23R3/60
CPCF23R3/54F23R3/60
Inventor 段小瑶张德宝李彩云赵鸿华涂波成丁南
Owner AECC HUNAN AVIATION POWERPLANT RES INST