Combined turbulent flow device capable of improving temperature uniformity of precombustion chamber
A technology of turbulence device and uniformity, which is applied in the combustion chamber, continuous combustion chamber, combustion method, etc., can solve the problems of poor temperature uniformity of combustion products and unstable operation of downstream components, so as to improve uniformity, improve uniformity, The effect of improving temperature uniformity
Pending Publication Date: 2018-12-07
BEIJING AEROSPACE PROPULSION INST
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Problems solved by technology
The existing pre-combustion chamber is mainly a cylindrical combustion chamber structure. Liquid hydrogen and liquid oxygen are sprayed through the nozzles in the pre-combustion chamber and then combusted. Due to the gaps between the nozzles, there are multiple mixed combustion points in the pre-combustion chamber. The product may be in a hydrogen-rich or oxygen-rich state, so the temperature uniformity of the combustion products in the pre-combustion chamber is poor; in the prior art, the combustion products in the cylindrical combustion chamber are not fully mixed before entering the downstream turbine, so that the gas with poor temperature uniformity directly enters the Downstream turbine, causing unstable operation of downstream components
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Embodiment 1
[0038] A combined turbulence device for improving the temperature uniformity of the pre-combustion chamber, including a discharge cooling body 2 and a transition body assembly 3, such as figure 1 and figure 2 shown.
[0039] The discharge cooling body 2 is cylindrical, and the inner surface of one end of the discharge cooling body 2 is provided with a spoiler structure; The area is 0.74; the area surrounded by the inner edge of the spoiler structure is A
[0040]
[0041] In the formula, Q is the medium flow rate, C d is the flow coefficient, N is the area coefficient of the spoiler structure, and the value of N is 2400.
[0042] The first embodiment of the spoiler structure is a spoiler ring, such as image 3 As shown, the second implementation method is a spoiler, such as Figure 4 As shown, the above two implementations are beneficial to the circulation of gas and reduce the flow resistance. In this embodiment, the chamfer at the joint between the turbulence struct...
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The invention provides a combined turbulent flow device capable of improving temperature uniformity of a precombustion chamber. The combined turbulent flow device comprises a discharge cooling body part (2) and a transition body part assembly (3), wherein the discharge cooling body part (2) is shaped like a cylinder, a turbulent flow structure is arranged on the inner surface of one end of the discharge cooling body part (2), and the transition body part assembly (3) comprises an elbow and a tee joint; and the end, provided with the turbulent flow structure, of the discharge cooling body part(2) is connected with the elbow of the transition body part assembly (3), and the discharge cooling body part (2) and the transition body part assembly (3) are used as a whole to be in an inverted S shape. According to the combined turbulent flow device, on the basis of the single cylindrical structure of a conventional combustion chamber, the turbulent flow structure, the elbow and the sphericaltee joint are additionally arranged, fuel gas can be fully blended, and therefore the uniformity of the outlet temperature is improved.
Description
technical field [0001] The invention relates to a combined turbulence device for improving the temperature uniformity of a pre-combustion chamber, which belongs to the engine power system. Background technique [0002] The pre-chamber is a burner that can generate combustion gas with a certain temperature and pressure, and the combustion gas generated by it is used to drive the downstream turbine to do work. This device is widely used in aerospace, ignition, combustion and other technical fields. The existing pre-combustion chamber is mainly a cylindrical combustion chamber structure. Liquid hydrogen and liquid oxygen are sprayed through the nozzles in the pre-combustion chamber and then combusted. Due to the gaps between the nozzles, there are multiple mixed combustion points in the pre-combustion chamber. The product may be in a hydrogen-rich or oxygen-rich state, so the temperature uniformity of the combustion products in the pre-combustion chamber is poor; in the prior ...
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IPC IPC(8): F23R3/00
CPCF23R3/00
Inventor 牛旭东丁兆波潘刚聂嵩姬威信王天泰赵世红刘倩刘鑫鹏孙纪国郑孟伟许晓勇王娟
Owner BEIJING AEROSPACE PROPULSION INST