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A Method of Correcting the Wind Resistance Characteristics of Lubricating Oil Radiator

A technology of air resistance characteristics and radiators, which is applied in the direction of instruments, special data processing applications, geometric CAD, etc., and can solve the problem of the deviation of the ground wind resistance characteristic curve of the oil radiator, the performance of the oil heat dissipation system that cannot meet the design requirements, and the performance that cannot be met Analyze requirements and other issues to achieve the effect of eliminating errors and avoiding substandard performance

Active Publication Date: 2019-11-15
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the ground ventilation test is generally used in the industry to obtain its wind resistance characteristics. The accuracy of this method itself is not a problem. However, the wind resistance characteristics obtained by the ground test cannot meet the performance analysis requirements of the system when it works at high altitudes.
Affected by the altitude, the density and temperature of the air have changed greatly, and the ground wind resistance characteristic curve of the oil radiator will have a large deviation, resulting in the performance of the oil cooling system not meeting the design requirements

Method used

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  • A Method of Correcting the Wind Resistance Characteristics of Lubricating Oil Radiator
  • A Method of Correcting the Wind Resistance Characteristics of Lubricating Oil Radiator
  • A Method of Correcting the Wind Resistance Characteristics of Lubricating Oil Radiator

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Embodiment 1

[0025] It is necessary to correct the wind resistance characteristic curve of a certain type of air-cooled oil radiator on board, the specific steps are as follows:

[0026] 1. Obtain the basic data of the air resistance characteristics of the oil radiator:

[0027] Through the ground ventilation test, the wind resistance characteristics of this type of lubricating oil radiator under standard atmospheric conditions at sea level are obtained, as shown in the formula [1]:

[0028] Δp=0.32·Q m 2 +0.115 Q m ……[1]

[0029] Among them, the ventilation rate Q m The unit of is kg / s, and the unit of wind resistance Δp is kPa.

[0030] 2. Calculate the air resistance Δp of the oil radiator after correction:

[0031] When the flight altitude of the aircraft is 6000m, look up the table to obtain the air density ρ at this altitude ∞ =0.6601kg / m 3 , the coefficient of aerodynamic viscosity μ ∞ =1.595×10 -5 Pa·s, air density ρ at sea level 0 =1.225kg / m 3 , the coefficient of aero...

Embodiment 2

[0038] It is necessary to correct the wind resistance characteristic curve of a certain type of air-cooled oil radiator on board, the specific steps are as follows:

[0039] 1. Obtain the basic data of the air resistance characteristics of the oil radiator:

[0040] Through the ground ventilation test, the wind resistance characteristics of this type of lubricating oil radiator under standard atmospheric conditions at sea level are obtained, as shown in formula (1):

[0041] Δp=0.5525·Q m 1.6 ……[1]

[0042] Among them, the ventilation rate Q m The unit of is kg / s, and the unit of wind resistance Δp is kPa.

[0043] 2. Calculate the air resistance Δp of the oil radiator after correction:

[0044] When the flight altitude of the aircraft is 4500m, look up the table to obtain the air density ρ at this altitude ∞ =0.7770kg / m 3 , the coefficient of aerodynamic viscosity μ ∞ =1.645×10 -5 Pa·s, air density ρ at sea level 0 =1.225kg / m 3 , the coefficient of aerodynamic visc...

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Abstract

The invention belongs to an aircraft accessory design technology and relates to a method for correcting a wind resistance characteristic of an oil cooler. The method is characterized by comprising the following correction steps of obtaining basic data of the wind resistance characteristic of the oil cooler; calculating the corrected wind resistance delta p' of the oil cooler; and obtaining a new wind resistance characteristic curve of the oil cooler. According to the method for correcting the wind resistance characteristic of the oil cooler, provided by the invention, the wind resistance characteristic of the oil cooler during overhead operation can be corrected, an error due to the use of a ground wind resistance characteristic curve is eliminated, and the situation that the performance of an oil cooling system does not reach the standard is avoided.

Description

technical field [0001] The invention belongs to the design technology of aircraft accessories, and relates to a method for correcting the wind resistance characteristics of a lubricating oil radiator. Background technique [0002] At present, the commonly used radiators on aircraft are usually divided into oil cooling, air cooling and hybrid cooling according to their cooling methods. Among them, the air-cooled lubricating oil radiator relies on forced ventilation to cool the lubricating oil flowing through it. Corresponding to different working conditions of the radiator, the demand for ventilation is also different. Lubricating oil radiator is a key component of engine lubricating oil system, and the evaluation of its cooling performance is the focus of lubricating oil system design. The wind resistance characteristic is one of the important performance parameters of the radiator, and it is also the basic input parameter for the calculation of lubricating oil performance....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/15
Inventor 吴宇钟剑龙
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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