CN105083568A - Commuting airplane fuel oil ventilation device - Google Patents
Commuting airplane fuel oil ventilation device Download PDFInfo
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- CN105083568A CN105083568A CN201410188706.5A CN201410188706A CN105083568A CN 105083568 A CN105083568 A CN 105083568A CN 201410188706 A CN201410188706 A CN 201410188706A CN 105083568 A CN105083568 A CN 105083568A
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- wedge
- domatic
- wedge shape
- fuel oil
- wide end
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- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention belongs to the technical field of airplane fuel oil system design, and particularly relates to a commuting airplane fuel oil ventilation device. The commuter category airplane fuel oil ventilation device is characterized in that in the device, an embedded ventilation opening (1) is positioned in the lower wing surface of an oil tank ventilation separation cabin; the embedded ventilation opening (1) is a bulge provided with a wedge-shaped slope; the top end of the wedge-shaped slope is in the front position of the heading direction; the height of the top end of the wedge-shaped slope surface is aligned with the wing surface; the wide end of the wedge-shaped slope surface is in the back position of the heading direction; through the height of the wide end of the wedge-shaped slope surface, an included angle being 7 to 9 degrees is formed between the slope surface of the wedge-shaped slope surface and the wing surface; the upper surface of the wide end of the wedge-shaped slope surface is provided with a ventilation pipe (8); a flame inhibitor (7) is sealed and fixed on the ventilation pipe (8) of the embedded ventilation opening (1); the cross section of the ventilation pipe (8) is a rectangle with the length-to-width ratio being 4:1 to 3:1; and the length of the cross section of the ventilation pipe (8) is 0.5 to 0.6 of the width of the wide end of the wedge-shaped slope surface.
Description
Technical field
The invention belongs to aircraft fuel system design field, particularly relate to a kind of airplane in commuter category fuel oil breather.
Background technology
The vent of fuel oil system, for ensureing that fuel tank can normal ventilation, is the requisite device of aircraft fuel system.When the vent of fuel oil system designs except meeting venting capability and requiring, also should consider the anti-icing of seaworthiness clause and anti-lightning strike requirement.
Therefore the vent of fuel oil system is divided into flush type mouth and convex type mouth, and conventional is flush type mouth at present.The flush type vent of fuel oil system and the flush type mouth of aircraft other system are not quite similar in position, parameter choose etc., although the research of fuel oil system submerged inlet in technology, test just appears in NASA document very early, not disclosed design information.
The flush type vent of fuel oil system is compared with the conventional submerged inlet only taking into account tolerance of aircraft other system, the two key distinction is that the flush type device aperture position of fuel oil blow and vent system is different with form, its principal parameter required is stamping pressure instead of dynamic head, conveniently cannot carry out theory calculate by flush type mouth, the flush type device of fuel oil system needs to carry out CFD simulation analysis or correlation test.
Summary of the invention
The object of invention
For airplane in commuter category provides a kind of actv. anti-icing, anti-lightning strike fuel oil breather.
The technical scheme of invention
This device is the assembly of a kind of flush type vent of design and Flame arrester, is arranged on aircraft ventilation separation airfoil.While this device can meet fuel tank ventilation requirement, due at lower aerofoil without outshot, can be effectively anti-icing, Flame arrester can ensure that again the fuel vapor lighted can not enter fuel tank.In addition, Flame arrester is designed with air inlet, exhaust check valve, and under the conditions such as Flame arrester blocking, check valve can open the intake and exhaust demand ensureing fuel tank.
A kind of airplane in commuter category fuel oil breather, in this device, flush type vent 1 is positioned at the lower aerofoil of fuel tank ventilation separation, flush type vent 1 is with the domatic bulge of wedge shape, the domatic tip of wedge shape is in front, course, the height at the tip that wedge shape is domatic is concordant with aerofoil, the domatic wide end of wedge shape is located rearward in course, the height of the wide end that wedge shape is domatic makes the domatic angle becoming 7 °-9 ° with aerofoil of wedge shape, the domatic wide end upper surface of wedge shape is provided with breather pipe 8, and Flame arrester 7 sealing is fixed on the breather pipe 8 of flush type vent 1.The cross section of breather pipe 8 is the oblong of aspect ratio 4:1-3:1, and the length in the cross section of breather pipe 8 is the 0.5-0.6 of the domatic wide end width of wedge shape.
The effect of invention
The design of this vent is in conjunction with after the concrete aerofoil profile Modling model of aircraft, according to the requirement of aircraft fuel oil blow and vent system throughput, use a simulation technology simulation admission port correlation parameter, after contrasting with existing test figures, result reliability is high, design cycle simplifies, and can reduce design cost, avoids loaded down with trivial details test link.
Accompanying drawing explanation
Accompanying drawing 1 is shaft side figure of the present invention.
Accompanying drawing 2 is A direction view of the present invention.
Wherein, 1. flush type vent; 2. ventilation separation lower aerofoil; 3. screw; 4. pad; 5. extruding type sealing nut; 6. the wedge shape of flush type vent is domatic; 7. Flame arrester; 8. the breather pipe of flush type vent; 9. screw; 10. nut; 11. pads; 12. Flame arrester air inlet check valves; 13. Flame arrester exhaust check valves; 14. Flame arrester effective ventilation areas; The width in the cross section of 15. breather pipes; The length in the cross section of 16. breather pipes.
Detailed description of the invention
A kind of airplane in commuter category fuel oil breather, in this device, flush type vent 1 is positioned at the lower aerofoil of fuel tank ventilation separation, flush type vent 1 is with the domatic bulge of wedge shape, the domatic tip of wedge shape is in front, course, the height at the tip that wedge shape is domatic is concordant with aerofoil, the domatic wide end of wedge shape is located rearward in course, the height of the wide end that wedge shape is domatic makes the domatic angle becoming 7 °-9 ° with aerofoil of wedge shape, the domatic wide end upper surface of wedge shape is provided with breather pipe 8, Flame arrester 7 is by screw 9, nut, pad 10 and rubber gasket or sealant 11 are fixed on the breather pipe 8 of flush type vent 1.The cross section of breather pipe 8 is the oblong of aspect ratio 4:1-3:1, and the length in the cross section of breather pipe 8 is the 0.5-0.6 of the domatic wide end width of wedge shape.
For certain type machine, a kind of method of designing of airplane in commuter category fuel oil breather is as follows:
A) be 9 ° according to this type machine ventilation separation area determination vent slope grade angle value, the aspect ratio design flush type vent of the flush type NACA mouth provided according to NASA;
B) according to the ceiling of this type machine, underriding and climbing speed, the high-power flat state such as to fly, the maximum intake and exhaust amount needed for fuel tank that calculates is 200 liters/min;
C) choose Flame arrester, its effective ventilation area should be not less than the breather pipe sectional area of diameter 18 millimeters; According to the requirement that maximum free air capacity is 200 liters/min, determine Flame arrester flow resistance;
D) by CFD simulation analysis, air-flow velocity in air intake passage punching press value and passage is calculated;
E) determine inlet charge area of passage, namely length is 104mm, width is 25mm; Flame arrester effective ventilation area 344mm
2;
F) Flame arrester passes in and out check valve circulation diameter is 30mm, ensures the normal intake and exhaust of energy when ventilating smooth or Flame arrester blocking;
G), after vent and Flame arrester have designed on request, assemble by diagram matching requirements.
Claims (1)
1. an airplane in commuter category fuel oil breather, it is characterized in that, in this device, flush type vent (1) is positioned at the lower aerofoil of fuel tank ventilation separation, flush type vent (1) is with the domatic bulge of wedge shape, the domatic tip of wedge shape is in front, course, the height at the tip that wedge shape is domatic is concordant with aerofoil, the domatic wide end of wedge shape is located rearward in course, the height of the wide end that wedge shape is domatic makes the domatic angle becoming 7 °-9 ° with aerofoil of wedge shape, the domatic wide end upper surface of wedge shape is provided with breather pipe (8), Flame arrester (7) sealing is fixed on the breather pipe (8) of flush type vent (1), the cross section of breather pipe (8) is the oblong of aspect ratio 4:1-3:1, the length in the cross section of breather pipe (8) is the 0.5-0.6 of the domatic wide end width of wedge shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410188706.5A CN105083568A (en) | 2014-05-07 | 2014-05-07 | Commuting airplane fuel oil ventilation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410188706.5A CN105083568A (en) | 2014-05-07 | 2014-05-07 | Commuting airplane fuel oil ventilation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105083568A true CN105083568A (en) | 2015-11-25 |
Family
ID=54565085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410188706.5A Pending CN105083568A (en) | 2014-05-07 | 2014-05-07 | Commuting airplane fuel oil ventilation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105083568A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107031853A (en) * | 2016-02-03 | 2017-08-11 | 埃姆普里萨有限公司 | For aircraft fuselage fuel tank ventilation line it is lightning protected |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080128557A1 (en) * | 2006-12-04 | 2008-06-05 | Acheson Kurt E | Vent system for an aerospace vehicle |
| US20120025026A1 (en) * | 2010-07-29 | 2012-02-02 | Airbus Operations Limited | Venting gas from a tank |
| CN102849217A (en) * | 2012-09-06 | 2013-01-02 | 中国航空工业集团公司西安飞机设计研究所 | Layout method for air vents of oil tank of wing unit |
| WO2013140156A1 (en) * | 2012-03-21 | 2013-09-26 | Airbus Operations Limited | A vent for an aircraft wing fuel tank |
| US20130263934A1 (en) * | 2012-02-14 | 2013-10-10 | Airbus Operations Limited | Aircraft fuel tank vent protector |
-
2014
- 2014-05-07 CN CN201410188706.5A patent/CN105083568A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080128557A1 (en) * | 2006-12-04 | 2008-06-05 | Acheson Kurt E | Vent system for an aerospace vehicle |
| US20120025026A1 (en) * | 2010-07-29 | 2012-02-02 | Airbus Operations Limited | Venting gas from a tank |
| US20130263934A1 (en) * | 2012-02-14 | 2013-10-10 | Airbus Operations Limited | Aircraft fuel tank vent protector |
| WO2013140156A1 (en) * | 2012-03-21 | 2013-09-26 | Airbus Operations Limited | A vent for an aircraft wing fuel tank |
| CN102849217A (en) * | 2012-09-06 | 2013-01-02 | 中国航空工业集团公司西安飞机设计研究所 | Layout method for air vents of oil tank of wing unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107031853A (en) * | 2016-02-03 | 2017-08-11 | 埃姆普里萨有限公司 | For aircraft fuselage fuel tank ventilation line it is lightning protected |
| CN107031853B (en) * | 2016-02-03 | 2022-03-18 | 埃姆普里萨有限公司 | Aircraft with a flight control device |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151125 |