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High-accuracy analysis method for oil intermingling characteristic in aircraft fuel tank

An analysis method and fuel tank technology, applied in instruments, special data processing applications, electrical digital data processing, etc., can solve problems such as changing the center of gravity distribution of the whole machine, fuel sloshing, etc., to solve sorting and repeated judgment, and improve reading efficiency. Effect

Active Publication Date: 2017-10-17
XI AN JIAOTONG UNIV
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Problems solved by technology

However, the fuel tank of an aircraft is usually divided into multiple compartments connected by string holes. During the flight of the aircraft, changes in motion attitude will cause fuel sloshing and fuel stringing between compartments, especially fuel stringing. Changing the distribution of fuel in each compartment will inevitably frequently and significantly change the distribution of the center of gravity of the whole aircraft in flight

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  • High-accuracy analysis method for oil intermingling characteristic in aircraft fuel tank
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  • High-accuracy analysis method for oil intermingling characteristic in aircraft fuel tank

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] The two most critical aspects of the present invention: one is "the digital model of the fuel tank structure of the aircraft is characterized by the STL geometric file format, and the method based on a balanced binary tree is used to read and store"; the other is "based on the smooth particle dynamics method Solving for fuel sloshing and stringing". The smooth particle dynamics method can accurately capture the fuel free surface. The existing technology only focuses on the change of the center of gravity caused by fuel sloshing, and the solution process is also a transient process of sloshing, not a steady-state process. The present invention focuses on the serial movement of fuel between the fuel tanks, but also pays attention to the change of the center of gravity caused by shaking. The digital model of the fuel tank structure chara...

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Abstract

The invention discloses a high-accuracy analysis method for an oil intermingling characteristic in an aircraft fuel tank. The method comprises the following steps that: through an STL (Standard Template Library) geometry file format, the digital model of a fuel tank structure is represented, and reading and storage are carried out by a method based on a balanced binary tree; and a smoothed particles hydrodynamics model is adopted to discretize continuous fuel into one series of fuel particles which have independent quality and mutually act, and the discretized fuel particles are subjected to analysis calculation to obtain the shaking and intermingling information, including the flowing law, the oil consumption sequence information and the like of the fuel in each compartment, of the fuel in each compartment in an aircraft movement process. By use of the method, the analysis accuracy of the shaking and the intermingling of the aircraft fuel can be improved.

Description

technical field [0001] The present invention relates to a high-precision analysis method for the characteristics of oil spillage in an aircraft fuel tank. More specifically, the present invention uses the STL geometric file format to characterize the fuel tank structure, and uses the smooth particle dynamics method to discretize continuous fuel into fuel particles. And based on this analysis and solution of fuel oil series and sloshing process. Background technique [0002] Analyzing the change of fuel center of gravity position and determining the distribution of the center of gravity of the whole aircraft is very important to control the flight stability of the aircraft. The Chinese patent "A digital real-time determination method for the position of the center of gravity of the aircraft fuel system" (public number: CN105022928A, public date: 2015.11.04), discretizes the fuel into fuel particles, and uses the smooth particle dynamics method to carry out the fuel tank for t...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20Y02T90/00
Inventor 李宝童洪军林起崟宣承斌郑帅
Owner XI AN JIAOTONG UNIV
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