Airborne fuel quality characteristic calculation method based on tetrahedron discretization
A fuel quality and characteristic calculation technology, applied in the direction of design optimization/simulation, special data processing applications, etc., can solve problems such as low degree of weight coincidence, influence on the design work of the whole machine, and large deviations, so as to reduce the impact of calculation data and improve Calculation accuracy and efficiency, effects of high-precision analysis
Pending Publication Date: 2021-11-09
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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Problems solved by technology
The amount of fuel calculated according to this method is not in good agreement with the weight measured by the fuel test after the aircraft is manufactured, and it is prone to large deviations, which seriously affects the design of the entire aircraft, and is no longer suitable for the current technological development level and model development requirements.
Through the research on domestic and foreign documents related to the quality characteristics of airborne fuel oil, it is found that there is no complete and standardized calculation method
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[0024] In order to make the purpose, technical solution and advantages of the application more clear, the technical solution in the embodiment of the application will be described in more detail below in conjunction with the drawings in the embodiment of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the application. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application. Embodiments of the present application will be described in detail below in conjunction with th...
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The invention belongs to the field of aircraft weight engineering, and particularly relates to an airborne fuel quality characteristic calculation method based on tetrahedron discretization. The method includes the steps of 1, constructing a three-dimensional model of fuel oil in an oil tank; 2, dispersing the three-dimensional model of the fuel oil into characteristic tetrahedron units; 3, calculating fuel quality characteristic parameters of the discretized characteristic tetrahedron units at a preset oil level angle; 4, calculating an oil surface normal vector according to the oil surface angle, projecting the centroids of the feature tetrahedron units to the oil surface normal vector, and sorting the feature tetrahedron units according to the height of the projection point positions on the oil surface normal vector; 5, accumulating the fuel oil quality characteristic parameters of the sorted characteristic tetrahedron units from low to high, thereby obtaining the dynamic quality characteristics of the fuel oil from empty oil to full oil. According to the airborne fuel oil quality characteristic calculation method based on tetrahedron discretization, high-precision analysis of the airborne fuel oil quality characteristics can be realized.
Description
technical field [0001] The application belongs to the field of aircraft weight engineering, and in particular relates to a method for calculating airborne fuel quality characteristics based on tetrahedron discretization. Background technique [0002] Fuel weight occupies an important proportion in the total weight of an aircraft, and fuel consumption is one of the main factors that cause changes in aircraft mass characteristics during flight. Fuel has fluidity, and its quality characteristics are obviously affected by flight attitude and overload, especially when the aircraft is in the take-off and landing stages. In order to ensure flight safety, it is necessary to give accurate fuel and aircraft center of gravity data. The internal space occupied by real fuel is relatively complex, mainly formed by the body structure, fuel system and other structural parts, finished parts, cables, etc.; the real fuel level has tilts and oscillations, and the description of the fuel level ...
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IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 戴浩周健姚艳潘若刚
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA