CN-122009502-A - Method and device for preparing nano bubble fuel from aviation system fuel tank

CN122009502ACN 122009502 ACN122009502 ACN 122009502ACN-122009502-A

Abstract

The invention discloses an aviation system fuel oil tank and a method and a device for preparing nano bubble fuel by the same, wherein the device comprises a central oil tank, two wing oil tanks, two engine oil tanks, two nano bubble fuel oil generators and a gas supply pipeline; the method comprises the steps of generating primary nano bubble fuel through the air flow injection device and the cyclone, flowing the primary nano bubble fuel into the central fuel tank, then conveying the primary nano bubble fuel to a wing fuel tank, introducing the acquired air source and fuel into a nano bubble fuel generator by utilizing the air entrainment of an engine compressor or ram air, generating secondary nano bubble fuel, returning the secondary nano bubble fuel to the wing fuel tank, and conveying the secondary nano bubble fuel to the engine fuel tank for combustion of an aeroengine. According to the invention, the self air source and the oil tank structure of the aircraft are fully utilized, nano bubble fuel is prepared in real time in the flight process, and the combustion efficiency of the aircraft engine is improved and the fuel consumption and pollutant emission are reduced through the cooperative design of the oil dividing tank and the oil dividing technology.

Inventors

YANG QIANG
PENG YIRAN
XU XIAO
WANG RENLIN
BI JINGHAO
LIU XIANG
XIE FAN
ZHANG SHIJIE
YANG JIAJUN
JIN JUN

Assignees

华东理工大学

Dates

Publication Date: 20260512
Application Date: 20260227

Claims (13)

1. The device for preparing the nano bubble fuel from the fuel tank of the aviation system is characterized by comprising a fuel tank unit, a nano bubble generation unit and a fuel conveying unit; The oil tank unit comprises a plurality of oil tanks which are communicated with each other, a first wing oil tank and a second wing oil tank which are respectively a central oil tank, are positioned at two sides of the central oil tank and are communicated with the central oil tank, and two engine oil tanks which are respectively positioned in a first aeroengine and a second aeroengine and are respectively communicated with the first wing oil tank and the second wing oil tank; the nano bubble fuel generation unit comprises a first nano bubble fuel generator, a second nano bubble fuel generator and a gas supply pipeline, wherein the first nano bubble fuel generator and the second nano bubble fuel generator are respectively integrated with a first wing fuel tank and a second wing fuel tank; the fuel oil conveying unit comprises a first ejector pump, a second ejector pump, a first fuel pump and a second fuel pump, wherein the first ejector pump and the second ejector pump are respectively positioned on a communicating pipeline of a central fuel tank and a first wing fuel tank and a communicating pipeline of the central fuel tank and a second wing fuel tank, and the first fuel pump and the second fuel pump are respectively positioned on a communicating pipeline of the first wing fuel tank and a first aeroengine and a communicating pipeline of the second wing fuel tank and a second aeroengine.
2. The device according to claim 1, wherein the central oil tank is provided with a loop for generating primary nano bubble fuel oil and an outlet pipeline connected with the first ejector pump and the second ejector pump, the loop is sequentially connected with a first valve, a central oil pump, a first pressure sensor, an air flow ejector device, a second pressure sensor and a cyclone, wherein the first valve, the central oil pump, the first pressure sensor, the air flow ejector device and the second pressure sensor are positioned outside the central oil tank, the cyclone is positioned inside the central oil tank, the central oil tank is further provided with a liquid level meter, one end, close to the central oil pump, of the air flow ejector device is provided with an air suction inlet, and the second valve is positioned on the outlet pipeline and is used for regulating and controlling the delivery of fuel oil in the central oil tank.
3. The apparatus of claim 2, wherein the air flow ejector generates a negative pressure at the intake air inlet for automatic intake of ambient air by liquid injection.
4. The apparatus of claim 1, wherein the nanobubble fuel generator is any one of nanobubble fuel generation apparatus based on an oleophobic fiber reactor, a venturi-oleophobic fiber reactor, a cyclone outgassing-particle bed reactor, a nanohole sintered metal mesh reactor.
5. The device of claim 4, wherein the nano bubble fuel generating device based on the oleophobic fiber reactor comprises a gas dissolving unit and a nano bubble generating reactor, the gas dissolving unit comprises a pressurizing pump and a gas mixer, the nano bubble generating reactor is filled with an oleophobic fiber module, a liquid inlet of the nano bubble generating reactor is arranged on one side of the oleophobic fiber module and is connected with an outlet of the gas dissolving unit, a liquid outlet of the nano bubble generating reactor is arranged at the bottom of the other side of the oleophobic fiber module and is used for outputting nano bubble fuel, and the oleophobic fiber module is a fiber bed layer formed by unordered stacking of super-oleophobic fibers.
6. The device of claim 4, wherein the nano bubble fuel generating device based on the Venturi tube-oleophobic fiber reactor comprises a Venturi tube, a nano bubble generating reactor and a large bubble separator, the Venturi tube comprises a contraction section, a throat tube and an expansion section which are sequentially communicated, a gas suction hole is formed in the throat tube of the Venturi tube, the nano bubble generating reactor is filled with an oleophobic fiber module, a liquid inlet of the nano bubble generating reactor is arranged on one side of the oleophobic fiber module and is communicated with an outlet of the expansion section of the Venturi tube, a liquid outlet of the nano bubble generating reactor is arranged at the bottom of the other side of the oleophobic fiber module and is used for outputting nano bubble fuel, the oleophobic fiber module is a fiber bed formed by unordered stacking of super oleophobic fibers, and the large bubble separator is arranged above the nano bubble generating reactor and is provided with an exhaust port at the top.
7. The device according to claim 5 or 6, wherein the surface of the super oleophobic fiber has a micro-nano composite structure, the super oleophobic fiber comprises a micron-sized cavity with the diameter of 0.25-5 μm and a nano-sized cavity with the diameter of 10-200 nm, the contact angle of the super oleophobic fiber to water is larger than 150 degrees, the contact angle of the super oleophobic fiber to standard test oil hexadecane is larger than 130 degrees, the fiber thickness of the fiber bed layer is 50-200 mm, and the filling density is 0.15g/cm 3 ～0.35g/cm 3 .
8. The apparatus according to claim 4, wherein the nano bubble fuel generating device based on the cyclone gas releasing-particle bed reactor comprises a cyclone generator and a particle bed therein, wherein a tangential liquid inlet is arranged at the upper end of the wall of the cyclone generator, an exhaust outlet and a liquid outlet are respectively arranged at the top and the bottom of the cyclone generator, a top particle filter screen and a bottom particle filter screen are arranged below the tangential liquid inlet in the cyclone generator, the particle bed is accommodated in a region surrounded by the side wall of the cyclone generator, the top particle filter screen and the bottom particle filter screen, at least two kinds of oil-repellent particles with different particle diameters are filled in the region at a volume filling rate of 50% -70% to form the particle bed, the ratio of the height H 1 between the top particle filter screen and the bottom particle filter screen to the height H of the cyclone generator is (1/3-2/3): 1, and the height ratio H/D of the cyclone generator is (2-5): 1.
9. The apparatus of claim 8, wherein the large oleophobic particles of the two different particle sizes have a particle size of 3-10mm and the small oleophobic particles have a particle size of 1-4mm, and wherein the ratio of the large oleophobic particles to the small oleophobic particles has a particle size of (1.5-5): 1.
10. The preparation device of the nano bubble fuel oil generating device based on the nano pore metal sintering net reactor is characterized by comprising a vertical tank body and a nano metal sintering net arranged inside the vertical tank body, wherein the structure of the nano pore metal sintering net comprises a supporting layer, a transition layer and a foaming layer which are sequentially arranged from inside to outside, the supporting layer axially comprises a functional section and a welding neck section, the welding neck section of the supporting layer is positioned above the functional section, a tangential circulating oil inlet port is arranged above one side wall of the vertical tank body, a nano bubble fuel oil outlet is arranged at the bottom of the vertical tank body, a gas inlet pipe is connected to the top of the vertical tank body, one end of the gas inlet pipe is positioned outside the vertical tank body and used for connecting an external gas passage, the other end of the gas inlet pipe extends vertically downwards deep into the vertical tank body and is connected with the welding neck section of the supporting layer, the welding neck section of the supporting layer is in butt joint with a pipe orifice at the tail end of the outer side of the gas inlet pipe through a girth joint, and a round sealing plate is welded at the bottom of the nano metal sintering net and is used for sealing the bottom of a gas phase passage.
11. The preparation device according to claim 10, wherein the pore diameter of the supporting layer of the nano metal sintering net is 20-50 μm, the pore diameter of the transition layer is 5-20 μm, and the pore diameter of the foaming layer is 0.5-10 nm.
12. A method for preparing nano bubble fuel from fuel tank of aviation system, using the device of any one of claims 1-11, comprising the steps of: S1, generating primary nano bubble fuel oil through an airflow injection device and a cyclone, and flowing the primary nano bubble fuel oil into a central fuel tank; S2, respectively conveying primary nano bubble fuel oil to a first wing fuel tank and a second wing fuel tank from a central fuel tank by using a first ejector pump and a second ejector pump, respectively introducing acquired air sources and fuel oil in the first wing fuel tank and the second wing fuel tank into corresponding nano bubble fuel oil generators by using engine compressors or ram air bleed air to generate secondary nano bubble fuel oil which is respectively returned to the first wing fuel tank and the second wing fuel tank; S3, the secondary nano bubble fuel oil is respectively conveyed into the two engine oil tanks from the first wing oil tank and the second wing oil tank by utilizing the first fuel pump and the second fuel pump, and is supplied to the first aeroengine and the second aeroengine for use.
13. The method according to claim 12, characterized in that the bleed air pressure in the bleed air with the engine compressor in step S2 is 0.3MPa-0.5MPa.

Description

Method and device for preparing nano bubble fuel from aviation system fuel tank Technical Field The invention belongs to the technical field of aviation fuel systems, and particularly relates to a method and a device for preparing nano bubble fuel from an aviation system fuel tank. Background With the increasing demands of modern aircraft for range, maneuverability and fuel economy, how to achieve efficient, low pollution combustion of fuel has become a hotspot for advancing aviation fuel system research. The nano bubble fuel has the core mechanism that when micro bubbles with diameters of tens to hundreds of nanometers are dispersed in the fuel, the area of a combustion interface is rapidly increased, gas in the bubbles rapidly expands and bursts in the heating process, liquid drops are secondarily broken and a micro explosion effect is generated, so that the synchronous reinforcement of liquid phase and gas phase reactions is realized. The prior art mainly adopts a ground fixed or vehicle-mounted level 'dissolved air-pressure release' system to prepare nano bubble fuel, and a typical structure comprises a high-pressure dissolved air tank, a pressure reducing valve and an oil-gas separator. For example, CN 111763543B discloses a preparation method of compressed nano hydrogen bubble/diesel oil mixed fuel, which utilizes hydrogen and diesel oil to dissolve in a compression cylinder and then instantly releases to normal pressure through a pressure reducing valve to separate out supersaturated gas to form nano bubbles, and CN 114087092B provides a supply control system and method of oxygen-enriched micro-nano bubble fuel of an engine, which can continuously prepare nano bubble fuel through an oxygen-enriched generator, a micro-nano bubble generator, a pressure limiting valve, an oil-gas separator and the like, so that the quality of the fuel can be improved under different rotating speeds and working conditions. However, the above methods all require a bulky high-pressure container and an oil-gas separation device, and are difficult to use on line in occasions with limited space, weight sensitivity and vibration and posture change such as wing oil tanks. Therefore, there is a need for a lightweight, on-line production scheme for nano bubble fuel for wing fuel tanks, which continuously provides high activity, low emission nano bubble fuel for engines. Disclosure of Invention The invention aims to overcome the defects in the prior art and provides a method and a device for preparing nano bubble fuel from an aviation system fuel tank. The aim of the invention can be achieved by the following technical scheme: The invention provides a device for preparing nano bubble fuel from an aviation system fuel tank, which comprises a fuel tank unit, a nano bubble fuel generation unit and a fuel conveying unit; The oil tank unit comprises a plurality of oil tanks which are communicated with each other, a first wing oil tank and a second wing oil tank which are respectively a central oil tank, are positioned at two sides of the central oil tank and are communicated with the central oil tank, and two engine oil tanks which are respectively positioned in a first aeroengine and a second aeroengine and are respectively communicated with the first wing oil tank and the second wing oil tank; the nano bubble fuel generation unit comprises a first nano bubble fuel generator, a second nano bubble fuel generator and a gas supply pipeline, wherein the first nano bubble fuel generator and the second nano bubble fuel generator are respectively integrated with a first wing fuel tank and a second wing fuel tank; the fuel oil conveying unit comprises a first ejector pump, a second ejector pump, a first fuel pump and a second fuel pump, wherein the first ejector pump and the second ejector pump are respectively positioned on a communicating pipeline of a central fuel tank and a first wing fuel tank and a communicating pipeline of the central fuel tank and a second wing fuel tank, and the first fuel pump and the second fuel pump are respectively positioned on a communicating pipeline of the first wing fuel tank and a first aeroengine and a communicating pipeline of the second wing fuel tank and a second aeroengine. In some embodiments of the invention, the central oil tank is provided with a loop for generating primary nano bubble fuel and an outlet pipeline connected with the first ejector pump and the second ejector pump, the loop is sequentially connected with a first valve, a central oil pump, a first pressure sensor, an airflow ejector device, a second pressure sensor and a cyclone positioned in the central oil tank, the cyclone is positioned in the central oil tank, the central oil tank is also provided with a liquid level meter, one end of the airflow ejector device, which is close to the central oil pump, is provided with an air suction inlet, and the second valve is positioned on the outlet pipeline and is used for regulating and cont