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Method for determining fuel quality characteristics of aircraft based on finite element method

A fuel quality and determination method technology, applied in instruments, special data processing applications, electrical digital data processing, etc., to achieve the effects of improving calculation efficiency, reducing cutting times, and meeting accuracy requirements

Inactive Publication Date: 2016-06-29
AVIC CHENGDU AIRCRAFT DESIGN & RES INST
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the calculation problem of the fuel quality characteristics of the aircraft at any attitude angle and improve the calculation efficiency, the present invention provides a method for determining the fuel quality characteristics of the aircraft, which can improve the calculation efficiency of the fuel quality characteristics and solve the problem of calculating the fuel quality characteristics at any attitude angle. question

Method used

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  • Method for determining fuel quality characteristics of aircraft based on finite element method
  • Method for determining fuel quality characteristics of aircraft based on finite element method
  • Method for determining fuel quality characteristics of aircraft based on finite element method

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Embodiment Construction

[0037] The present invention will be described in further detail below by means of specific embodiments:

[0038] In the first step, the Figure 6 The shown CATIA fuel tank model is discretized with a tetrahedral mesh as Figure 7 The fuel tank model shown in text format.

[0039] The second step is to pre-cut the text format fuel tank file 10 times, according to different fuel level h i Calculate the corresponding fuel mass m i , where i=1, 2, 3...10, in this example, the calculation is carried out at different fuel level heights at intervals of one-tenth of the fuel tank height, and the results are as follows:

[0040] i

1

2

3

4

5

6

7

8

9

10

Liquid height(mm)

100

200

300

400

500

600

700

800

900

1000

Fuel weight(kg)

50

102

163

220

272

328

380

430

475

520

[0041] In the third step, the mass of fuel oil to be requested m d i...

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Abstract

The invention belongs to the technical field of flight vehicles overall design, and especially relates to a method for determining fuel quality characteristics of an aircraft. The invention significantly improves the calculation efficiency of the fuel quality characteristics, and solves the problem of the calculation of the fuel quality characteristics under arbitrary attitude angles. The method can calculate the fuel quality characteristics of fuel in a fuel tank under arbitrary attitude angles. In order to improve the efficiency, an interpolation method is used in a quality characteristic calculation process, the number of cutting of a text format fuel tank file can be reduced from the order of magnitude, the computational efficiency can be improved, and the obtained fuel quality characteristics data satisfy an accuracy requirement. The technology has been successfully applied to the domestic oil consumption sequence design of multiple models and fuel quality characteristics calculation, and the needs of model design can be satisfied.

Description

technical field [0001] The invention belongs to the technical field of aircraft overall design, in particular to a method for determining aircraft fuel quality characteristics. Background technique [0002] With the development of modern aircraft design, higher requirements are put forward for agile design, which requires fast calculation of fuel quality characteristics at any attitude angle. The traditional calculation method of fuel quality characteristics is to first calculate the area of ​​the cut fuel tank, then multiply the area by a micro-height to obtain the volume of the fuel tank, and finally calculate the fuel quality characteristics by calculating the fuel volume and fuel density. The traditional method has the following two shortcomings: first, the traditional mass characteristic calculation method can only calculate the aircraft fuel quality characteristics under the pitch angle; second, it needs to perform tens of thousands of fuel tank slices, which is time-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 刘吉学陈勇桢张全张晓东李为陈剑波
Owner AVIC CHENGDU AIRCRAFT DESIGN & RES INST
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