Thermoacoustic stability prediction method and device
A stability prediction and thermoacoustic technology, applied in the field of thermodynamic machinery, can solve the problems that cannot represent the thermoacoustic stability results of the three-dimensional space combustion system, and achieve the effect of improving robustness
Active Publication Date: 2022-02-11
BEIHANG UNIV
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Since this model is assumed to be infinitely thin in the radial direction, the influence of the axial direction is only described in the unsteady heat release model, so that the influence of the axial flow velocity and the radial variation of the circumferential flow velocity are ignored, resulting in the use of this method The calculated results are only for a simple two-dimensional space, and cannot represent the thermoacoustic stability results of a combustion system in a real three-dimensional space
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[0074] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments It is a part of the embodiments of the present disclosure, but not all of the embodiments, and in the case of no conflict, the implementation modes and the features of the implementation modes in the present disclosure can be combined with each other. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.
[0075] In the prior art, the method for considering the influence of circumferential flow velocity on thermoacoustic stability is based on the circumferential low-order aco...
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The invention relates to the field of thermal machinery and particularly relates to a thermoacoustic stability prediction method and device. Through the thermoacoustic stability prediction method, thermoacoustic stability prediction of the thermal equipment, which is more accurate and closer to the real condition, can be realized under a complex flowing condition, such as the influence of rotational flow; the change rule of thermoacoustic stability under the influence of different flow parameters and different heat release conditions can be researched, and a reasonable parameter design range is provided for safe and stable work of a combustion system; according to the method, the design scheme can be optimized, the existing design scheme is optimized after the actual conditions of complex flow rotational flow, radial non-uniform distribution of disturbance quantity and the like are considered, it is guaranteed that a combustion system works safely within a wider range, and robustness of the combustion system is improved.
Description
technical field [0001] The present disclosure relates to the field of thermodynamic machinery, in particular to a method and device for predicting thermoacoustic stability. Background technique [0002] In thermal devices such as aero-engine combustors and industrial gas turbines, in order to ensure that the fuel has sufficient combustion time, devices such as swirlers are often installed to increase the combustion recirculation area and ensure sufficient combustion of the fuel. At the same time, before the afterburner of the aero-engine, a slanted support plate will be installed to increase the blocking ratio, so as to realize the stealth performance of the engine. The development requirements and development trends of the above thermal devices mean that greater swirl velocity will be generated in the combustion system. In the past, the method of predicting thermoacoustic stability based on the circumferential low-order acoustic network model was difficult to consider the ...
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Login to View More IPC IPC(8): G06F17/11
CPCG06F17/11Y02T90/00
Inventor 孙晓峰秦蕾王晓宇张光宇孙大坤杜林
Owner BEIHANG UNIV