Method and system for predicting two-dimensional effectiveness of film cooling based on scalar transport equation
A prediction method, a technology of film cooling, applied in the direction of prediction, complex mathematical operations, data processing applications, etc., can solve problems such as difficult to accurately locate the local overheating phenomenon on the surface of the component, and cannot achieve full-coverage film cooling with high efficiency and reliable prediction. , to achieve a reliable predictive effect
Active Publication Date: 2022-05-17
TSINGHUA UNIV
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Problems solved by technology
[0011] The invention provides a method and system for predicting the two-dimensional effectiveness of film cooling based on the scalar transport equation, which is used to solve the problem that the existing one-dimensional prediction method is difficult to accurately locate the local over-temperature phenomenon on the surface of the component, and for different hole rows The dislocation relationship and the predicted results are all the same, and it is impossible to realize the technical problem of efficient and reliable prediction of full-coverage film cooling
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[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0028] The method and system for predicting the two-dimensional effectiveness of film cooling based on the scalar transport equation according to the embodiments of the present invention will be described below with reference to the accompanying drawings. A two-dimensional effectiveness prediction method for film cooling.
[0029] figure 2 It is a method for predicting the two-dimensional effectiveness of film cooling based on the scalar transport equation according to an embodiment of the present invention.
[0030] Such as ...
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The invention discloses a method and system for predicting the two-dimensional effectiveness of film cooling based on the scalar transport equation. The aerodynamic parameters of the flow are taken as its input parameters; based on the boundary layer theory, the two-dimensional scalar transport equation is parabolicized through the magnitude analysis; the two-dimensional effectiveness distribution of the single-hole row is solved based on the space propulsion method, and the two-dimensional Sellers superposition model is introduced, and the The two-dimensional effectiveness prediction model of the single-hole row is extended to the multi-hole row prediction, and the two-dimensional distribution result of the effectiveness of the full-coverage gas film is obtained. Based on the scalar transport equation, this method extends the one-dimensional effectiveness prediction method to two-dimensional, and realizes the two-dimensional high-precision prediction of the gas film effectiveness.
Description
technical field [0001] The invention relates to the technical field of film cooling of gas turbines, in particular to a method and system for predicting the two-dimensional effectiveness of film cooling based on scalar transport equations. Background technique [0002] Gas turbine film cooling is a widely used cooling technology. Such as figure 1 As shown, air is drawn from the side of the compressor, without going through the combustion chamber, and injected into the high-temperature mainstream boundary layer through discrete gas film holes on the surface of the turbine component to form a cooling gas film, which isolates the surface of the component from high-temperature gas and prevents the turbine from Ablation of components. [0003] Air film cooling is different from traditional slot cooling in that it has a full three-dimensional flow structure, especially in the turbine end region, where there is a complex cold gas migration mechanism, and the distribution of film ...
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IPC IPC(8): G06Q10/04G06F30/20G06F17/11
CPCG06Q10/04G06F30/20G06F17/11Y02T90/00
Inventor 陈子聿李毅飞苏欣荣袁新
Owner TSINGHUA UNIV