CN111964098B - Method for determining oil filter size of fuel nozzle of aircraft engine - Google Patents
Method for determining oil filter size of fuel nozzle of aircraft engine Download PDFInfo
- Publication number
- CN111964098B CN111964098B CN202010854964.8A CN202010854964A CN111964098B CN 111964098 B CN111964098 B CN 111964098B CN 202010854964 A CN202010854964 A CN 202010854964A CN 111964098 B CN111964098 B CN 111964098B
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- Prior art keywords
- oil filter
- size
- fuel
- filter
- fuel nozzle
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtration Of Liquid (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
A method for determining the size of an oil filter of a fuel nozzle of an aircraft engine comprises the following steps of 1) selecting the mesh size of the oil filter according to the minimum flow passage size of a sprayer; the mesh diameter of the filter is less than or equal to 1/8 of the minimum channel size of the sprayer when the temperature of the fuel is higher than 120-170 ℃, and the mesh diameter of the filter is less than or equal to 1/10 of the minimum channel size of the sprayer when the temperature of the fuel is lower than 120 ℃; 2) the pressure drop generated on the oil filter is controlled within the range of 0.5-1.0 kpa, the total flow area of the oil filter is determined, the pressure drop of the oil filter is reduced for a fuel nozzle supplying oil at low pressure, and the size of the oil filter on an individual filter screen part diagram is finally obtained by combining the installation structure of the oil filter in the fuel nozzle. The method for determining the size of the fuel nozzle of the aircraft engine, provided by the invention, not only considers the filtration degree of the fuel filter, but also considers the problems of pressure drop and the like generated by the fuel filter, so that the result is more accurate, and a large amount of manpower and material resources are saved.
Description
Technical Field
The invention relates to the technical field of aircraft engines, in particular to a method for determining the oil filter size of a fuel nozzle of an aircraft engine.
Background
The oil filter of the fuel nozzle of the aircraft engine has a filtering effect on fuel, and large-size particles in the fuel are filtered, so that a narrow channel in the sprayer of the nozzle cannot be blocked and fails. Because the oil filter has certain fluid resistance, pressure loss is generated when fuel oil flows through the oil filter. The pressure loss caused by the oil filter directly reduces the supply pressure in front of the atomizer, which adversely affects the flow rate of the nozzle, the spray angle and the spray quality.
In the conventional fuel nozzle design, there is no clear guidance for setting the size of the fuel filter. Because the design attention of the oil filter is not enough and the design is random, the design practice usually only considers the filtration degree of the oil filter screen, and the pressure loss caused by the oil filter and the deposition problem of fuel coking on the oil filter are little considered or not considered. As a result, the pressure of the fuel supply in front of the atomizer is reduced, which reduces the flow rate and spray angle of the originally designed atomizer, and in order to make the performance of the atomizer meet the design requirements, the atomizer has to be polished, thus virtually increasing the workload of atomizer correction and wasting the pressure energy provided for the fuel supply of the nozzle. Especially for nozzles for low-pressure oil supply, the pressure loss over the oil filter is of greater concern.
Disclosure of Invention
In view of the above, the present invention is directed to a method for determining the size of an oil filter of a fuel nozzle of an aircraft engine, so as to overcome the disadvantages of the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for determining the size of an oil filter of a fuel nozzle of an aircraft engine comprises the following steps:
1) firstly, selecting the mesh size of an oil filter screen according to the minimum flow passage size of a sprayer, determining the severity of fuel coking according to the fuel temperature, and determining the value range of the mesh size;
the mesh diameter of the filter is less than or equal to 1/8 of the minimum channel size of the sprayer when the temperature of the fuel is higher than 120-170 ℃, and the mesh diameter of the filter is less than or equal to 1/10 of the minimum channel size of the sprayer when the temperature of the fuel is lower than 120 ℃;
2) the pressure drop generated on the oil filter is controlled within the range of 0.5-1.0 kpa, the total flow area of the oil filter is determined, the pressure drop of the oil filter is reduced for a fuel nozzle supplying oil at low pressure, and the size of the oil filter on an individual filter screen part diagram is finally obtained by combining the installation structure of the oil filter in the fuel nozzle.
Compared with the prior art, the method for determining the oil filter size of the fuel nozzle of the aircraft engine has the following advantages:
the method for determining the size of the fuel nozzle of the aircraft engine, provided by the invention, not only considers the filtration degree of the fuel filter, but also considers the problems of pressure drop and the like generated by the fuel filter, so that the result is more accurate, and a large amount of manpower and material resources are saved.
Detailed Description
A method for determining the size of an oil filter of a fuel nozzle of an aircraft engine comprises the following steps:
1) firstly, selecting the mesh size of an oil filter screen according to the minimum flow passage size of a sprayer, determining the severity of fuel coking according to the fuel temperature, and determining the value range of the mesh size;
the mesh diameter of the filter is less than or equal to 1/8 of the minimum channel size of the sprayer when the temperature of the fuel is higher than 120-170 ℃, and the mesh diameter of the filter is less than or equal to 1/10 of the minimum channel size of the sprayer when the temperature of the fuel is lower than 120 ℃;
2) the pressure drop generated on the oil filter is controlled within the range of 0.5-1.0 kpa, the total flow area of the oil filter is determined, the pressure drop of the oil filter is reduced for a fuel nozzle supplying oil at low pressure, and the size of the oil filter on an individual filter screen part diagram is finally obtained by combining the installation structure of the oil filter in the fuel nozzle.
The method for determining the size of the fuel nozzle of the aircraft engine, provided by the invention, not only considers the filtration degree of the fuel filter, but also considers the problems of pressure drop and the like generated by the fuel filter, so that the result is more accurate, and a large amount of manpower and material resources are saved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (1)
1. A method for determining the size of an oil filter of a fuel nozzle of an aircraft engine is characterized by comprising the following steps:
1) firstly, selecting the mesh size of an oil filter screen according to the minimum flow passage size of a sprayer, determining the severity of fuel coking according to the fuel temperature, and determining the value range of the mesh size of the oil filter screen;
under the condition that the fuel temperature is higher than 120-170 ℃, the mesh size of the oil filter screen is less than or equal to 1/8 of the minimum flow passage size of the sprayer, and under the condition that the fuel temperature is lower than 120 ℃, the mesh size of the oil filter screen is less than or equal to 1/10 of the minimum flow passage size of the sprayer;
2) the pressure drop generated on the oil filter is controlled within the range of 0.5-1.0 kpa, the total flow area of the oil filter is determined, the pressure drop of the oil filter is reduced for a fuel nozzle supplying oil at low pressure, and the size of the oil filter on an individual filter screen part diagram is finally obtained by combining the installation structure of the oil filter in the fuel nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010854964.8A CN111964098B (en) | 2020-08-24 | 2020-08-24 | Method for determining oil filter size of fuel nozzle of aircraft engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010854964.8A CN111964098B (en) | 2020-08-24 | 2020-08-24 | Method for determining oil filter size of fuel nozzle of aircraft engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111964098A CN111964098A (en) | 2020-11-20 |
| CN111964098B true CN111964098B (en) | 2022-08-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010854964.8A Active CN111964098B (en) | 2020-08-24 | 2020-08-24 | Method for determining oil filter size of fuel nozzle of aircraft engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN111964098B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470340B (en) * | 2013-09-13 | 2016-01-20 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of aeroengine combustion lube pipe cone-shaped filter |
| CN204851502U (en) * | 2015-07-15 | 2015-12-09 | 河南省安克林滤业有限公司 | Leak protection oil aeroengine fires smooth oil pipe way with filter equipment that appears to one side |
| JP2017040167A (en) * | 2015-08-17 | 2017-02-23 | 京三電機株式会社 | Fuel filter and element |
| DE202015105088U1 (en) * | 2015-09-25 | 2015-10-08 | Spheros Gmbh | fuel filter |
| CN111173662B (en) * | 2019-12-27 | 2022-08-16 | 成立航空股份有限公司 | Design method of net-shaped oil filter of fuel nozzle |
-
2020
- 2020-08-24 CN CN202010854964.8A patent/CN111964098B/en active Active
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| Publication number | Publication date |
|---|---|
| CN111964098A (en) | 2020-11-20 |
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