Device for burning fuel

 

The proposed device relates to techniques for combustion, for example, using ozonation. Device for burning fuel contains connected in series compressor performance Qgasthe first valve and bubbler with located therein a dispersant, and a fuel tank with a volume flow rate of Qtthe second valve and the nozzle, and the separator bubbles and cavitator, and the inlet port of the separator is connected to the output of the bubbler, the first output nozzle separator is connected to the throat of the fuel tank, which is located in its lower part, the second outlets of the separator is connected to the input of the second gate, the output of which is connected to the input of the cavitator, the output of which is connected to the inlet nozzle. In addition, a dispersant bubbler has a contact surface with the liquid phase, which has a wetting angle of the liquid phase is less than 50 degrees. The ratio of length L and diameter d of the input nozzle separator is selected in the range of L:d=5,38 to 0.8. Inlet port of the separator has a cross-section, flattened vertically, and the first output nozzle has a cross section elongated in the direction of motion of the liquid phase. The ratio of the cross-section of the input nozzle separator Rinon gorizontalnoso the output fitting of the separator Routlongitudinal L3 and L4 transverse axes selected in the range Rout=L3:L4=1.8-To 2.2. Section of the inlet fitting of the separator has a convex upper bound. The ratio of compressor capacity Qtand volumetric fuel consumption Qtchoose from the condition that the coefficient of Qgas/Qtthe gas-filling of the liquid phase was not less than 15%. Fuel tank with a volume flow rate Q at a rate of upwelling of the separated bubbles V made with the throat diameter d which is determined by the following relationship:. The invention improves the efficiency of jet engines. 8 C.p. f-crystals, 1 Il.

The proposed device relates to techniques for combustion, for example, by pre-ozonation. It can be used in particular to improve the efficiency of jet engines.

Known analogue of the proposed device, which implements a system of evaporation of fuel [1] (US Pat. No. 6155239, N. Cl.123/522; Int.Cl. F 02 M 037/04, 10.01.2000) containing connected in series compressor (fan) and the bubbler with located therein a dispersant, and the fuel tank and the injector.

In addition, in the known device bariga level of liquid fuel (from the flooded part of the tank), the fuel comes in a tract of mixing liquid fuel with a gas, the latter comes from the second discharge nozzle of the fuel tank located above the level of liquid fuel, and the exit path of the mixing connected with the inlet nozzle.

The lack of similar [1] is that it is high time ignition delay and high temperature stable combustion fuel combustion in a supersonic flow and, as a consequence of increased energy consumption due to the need of burning excessive fuel due to non-optimal process of burning.

As a result, the disadvantage of this and similar technical solutions in their application to combustion in air-breathing engine (WFD) is to increase the size of the combustion chamber, which, in turn, reduces the efficiency of the process of fuel deterioration and operational characteristics of the WFD in General.

Closest to the proposed technical solution is the device that implements the method of saturation of liquids micropezidae gas (e.g. air) [2] (velikodnyi C. Y. and other “Research opportunities for the creation of engine detonation”), adopted in Kacha is fired in him a dispersant, as well as the fuel tank, the second valve and the nozzle.

In addition, in the known device the output of the bubbler is connected to the input of the fuel tank, the output of which is connected to the inlet nozzle.

This dispersant bubbler in the prototype is made of hydrophobic material is polyethylene or stainless steel.

Device-prototype [2] works as follows. The compressor through the open first valve pumps the air bubbler. The bubbler is a tank divided by porous partition (dispersant) two cavity - input and output. The input cavity is filled with gas coming from the compressor through the open first valve. The output cavity is filled with the liquid phase (oil) coming from the fuel tank. The passage of air through the disperser fuel from the outlet of the bubbler is supplied into the fuel tank in the form of a gas-liquid emulsion. As a result, the fuel in the fuel tank becomes porous, contains air bubbles distributed in the liquid phase. At the boundary of liquid and gaseous phases in the process of establishing a dynamic equilibrium evaporation fuel gas bubbles inside. This increases the degree of readiness of the fuel to woznick way this change in the structure of fuel increases the output characteristics of the air-breathing engine.

However, in the device prototype is formed insufficiently fine structure of the fuel, the bubbles of the gas phase is too large and uniform in size. This reduces the efficiency of the device the combustion of fuels leads to longer ignition delay and higher initial temperature stable combustion and ultimately result in the need to increase the fuel consumption, to ensure the specified operating modes of the air-jet engine.

In addition, the worsening of the ecological characteristics of the device due to the formation of harmful emissions resulting from incomplete combustion of fuel.

To compensate for the reduction characteristics of the engine have to increase the size of the nozzle, which, however, increases the dimensions of the reactor, increases their cost. This, obviously, reduces the stability of engine operation, decreases their reliability.

In addition, the provision of the small size of the bubbles in poor wettability of the surface of the disperser requires the decrease of the pore size of the outer layer of the membrane. This leads to higher pressure loss occurs faster clogging of the membrane particles of dust and grit, coming to the disperser with injected into the input cavity of the bubbler gas, and sediment falling out of fuel, especially during periods of interruption (sedimentation). It also leads to the above-mentioned disadvantages of the operation of the known device.

So, the lack of installation of the prototype [2] is the deterioration of the following characteristics:

- energy intensity;

- ecology;

- reliability;

cost;

- efficiency developments of light fractions of fuel, active radicals and initiation of the chain reaction;

- dimensions.

Accordingly, required when implementing device technical result consists in the following:

improve fuel quality,

- to increase the probability of formation of active centers, initiating the beginning of a chain reaction,

improve combustion stability,

in the reduction of the threshold ignition chain reaction,

- to improve combustion efficiency,

- to improve the environmental and operational (reliability, power, power) characteristics of the WFD,

in reducing the cost and size of the device.

The drawing shows a diagram of the device and used the following conventions compound is>/p>6 - second gate,

7 - injector,

8 - separator,

9 - cavitator,

Disadvantages installation of the prototype are eliminated in the proposed apparatus, which is represented in the diagram (see drawing) and includes: connected in series compressor performance Qgasthe first valve and bubbler with located therein a dispersant, and a fuel tank with a volume flow rate of Qtthe second valve and the nozzle, thus entered the separator bubbles and cavitator, and the inlet port of the separator is connected to the output of the bubbler, the first output nozzle separator is connected to the throat of the fuel tank, which is located in its lower part, the second outlets of the separator is connected to the input of the second gate, the output of which is connected to the input of the cavitator, the output of which is connected to the inlet nozzle.

In addition, a dispersant bubbler has a contact surface with the liquid phase, which has a wetting angle of the liquid phase is less than 50 degrees.

In addition, the ratio of length L and diameter d of the input nozzle separator is selected within L:d=5.38-0.8.

In addition, the inlet port of the separator has a cross-section, flattened vertically, and the first output nozzle has a cross section elongated in the direction of motion idky L1 and L2 vertical axes, selected within the

Rin=L1:L2=1.1-3.

In addition, the ratio of the cross-section of the first output nozzle separator Routlongitudinal L3 and L4 transverse axes selected within

Rout=L3:L4=1.8-2.2.

In addition, the section of the inlet fitting of the separator has a convex upper bound.

In addition, the ratio of the compressor output Qgasand volumetric fuel consumption Qtchoose from the condition that the coefficient of Qgas/Abouttthe gas-filling of the liquid phase was not less than 15%.

In addition, a fuel tank with a volume flow rate Q at a rate of upwelling of the separated bubbles V made with the throat diameter d which is determined by the following relationship:

Now, consider the operation of the device, made by the scheme drawing.

The work of the proposed device, as in the prototype, based on the fact that the compressor 1 through the open valve 2 pump air bubbler 3. The bubbler is a tank, divided into two (input and output) cavity porous partition - disperser 4. The input cavity is filled with gas coming from the compressor 1 through the open valve 2. The output cavity is filled with the liquid phase (turn the bubbler is fed to the input (input port) of the separator 8. In the separator of large gas bubbles have time to climb up into the fuel tank in the form of a gas-liquid emulsion. During the gas-liquid mixture in the separator of large gas bubbles have time to float up and through the first output (output port) of the separator 8 are in the fuel tank 5. Small gas bubbles with current gas-liquid mixture passing to the second output of the separator 8 and then through open valve 6 porous fuel enters the cavitator 9. In the cavitator the ratio of the dimensions of the channel are chosen such that the rate of passage of fuel exceeded the speed of sound at a given porosity of the fuel (e.g., about 20 m/s). As a result, the fuel passing cavitator, exposed to shock waves. The gas bubbles collapse, the hydrocarbon molecules are broken down into fragments that are formed light fractions. At the same time, the formation of radicals, active molecules with a very low threshold of beginning a chain reaction. This significantly increases the degree of readiness of the fuel to the emergence and course of the chain reaction of combustion at the outlet of the gas-liquid plume from the nozzle. Stability of combustion, increases the combustion efficiency. In addition, the presence of shock-wave processes in the inside of bubbles, intensive processes of vaporization and cracking with time of light fractions and radicals. While there are active centers for the occurrence of a chain reaction. There is a process of partial combustion, in which fuel is activated, prepared for sustainable burning and complete combustion. This also improves the structure of the porous fuel, increases the uniformity of its properties, which, consequently, improves the quality of the fuel. Thus, this change in the structure of fuel significantly increases the output characteristics of the air-breathing engine.

As already mentioned, the formation of a finely dispersed gas-liquid mixture boosting fuel efficiency. To reduce the size of the generated bubbles in the bubbler gas, as shown by the experiments, the surface of the disperser is a porous plate through which the gas bubbles appear in the volume of the liquid phase must be well wetted by the liquid phase. When this separation bubble formed under the force of Archimedes occurs earlier at a lower value of the volume of the bubble. In addition, the tendency of the dispersant to the “sedimentation” is also reduced with good wettability of the surface of the var. the ri good wetting of the magnitude of this angle is reduced. Improving the wettability of the dispersant reduces unproductive loss of gas pressure on the dispersant increases the efficiency of the device. In addition, decreases the size of the generated bubbles, the structure of the fuel becomes smaller, as the pore size decreases. Therefore, the process of cracking of the fuel, developments radicals are more intensively. This also improves the quality of fuel its activity.

It should be clear that to ensure the work of the cavitator in shock-wave mode, it is necessary to protect the cavitator from entering its channel of large bubbles. The latter is able to block the channel of the cavitator and translate his work in a reciprocating mode. Thus, possibility of activation of the fuel due to the conditions of its shock-wave excitation. This is not the case in the proposed device, taking into account the fact that large bubbles of gas, which is characterized by the speed of ascension, during the movement of the porous fuel along the channel separator manage to ascend to the upper boundary, where they arrive at the first outlet of the separator and then into the fuel tank. Small bubbles, continuing its movement together with the current plague also explain what is the fuel tank with a volume flow rate Q at a rate of upwelling of the separated bubbles V made with the throat diameter d which is determined by the following relationship:

This proceeded from the following obvious relation:

0.25d2V=Q.

This formula expresses the line of flow Q of the fuel tank to the fuel quantity flowing with velocity V through the throat (inlet port) of the fuel tank cross-section 0.25d2. Here the velocity V is chosen equal to the speed of floating bubbles of a certain size. For example, the throat of the fuel tank 5 is made of such diameter that the rate of flow of fuel down into the separator 8 would be a certain value, for example, of the order of 6-15 cm/S. This ensures that the throat of the fuel tank 5 in gas mode shutter in which bubbles with ascent rate more 6-15 cm/s, overcoming the counter flow of fuel into the throat of the tank, up the tank. Bubbles with lower speed limits, respectively, with a diameter of less than 30-500 μm are removed by the fuel flow in the main duct of the separator and pass for his second output fitting. This ensures high quality of separation pitt.

Thus, the proposed device for the combustion of fuels containing connected in series compressor, the first valve and bubbler with located therein a dispersant, and a fuel tank, a second valve and a nozzle, in which, in addition, introduced separator bubbles and cavitator, and the inlet port of the separator is connected to the output of the bubbler, the first output nozzle separator is connected to the throat (inlet) fuel tank, which is located in its lower part, the second outlets of the separator is connected to the input of the second gate, the output of which is connected to the input of the cavitator, the output of which is connected to the inlet nozzle.

In addition, a dispersant 4 bubblers 3 has a contact surface with the liquid phase, which has a wetting angle of the liquid phase is less than 50 degrees.

In addition, the ratio of length L and diameter d of the input nozzle of the separator 8 is selected within L:d=5.38-0.8.

In addition, the inlet port of the separator 8 has a cross-section, flattened vertically, and the first output nozzle has a cross section elongated in the direction of motion of the liquid phase.

In addition, the ratio of the cross-section of the input nozzle separator 8 Rinhorizontal L1 and L2 vertical axes selected in the range RinOlney L3 and L4 transverse axes selected within

Rout=L3:L4=1.8-2.2.

In addition, the section of the inlet fitting of the separator has a convex upper bound.

In addition, the ratio of the performance of the compressor 1 (gas) Qgasand the volumetric flow of fuel from the fuel tank 5 Qtchoose from the condition that the coefficient of Qgas/Abouttthe gas-filling of the liquid phase was not less than 15%.

In addition, the fuel tank 5 with a volume flow rate Q at a rate of upwelling of the separated bubbles V made with the throat diameter d which is determined by the following relationship:

Next we show that due to the considerable differences of the proposed facility provides the required technical result.

That the separator bubbles and cavitator, and the inlet port of the separator is connected to the output of the bubbler, the first output nozzle separator is connected to the throat (inlet) fuel tank, which is located in its lower part, the second outlets of the separator is connected to the input of the second gate, the output of which is connected to the input of the cavitator, the output of which is connected to the inlet nozzle allows the activation of the fuel due to its conversion to the cavitator. When this shock wave is s partial combustion in the production of light fractions, active radicals. All this improves the quality of the fuel, increases the probability of formation of active centers, initiating the beginning of a chain reaction, improves combustion stability, reduces the threshold ignition chain reaction, improves the combustion efficiency increases and environmental performance (reliability, power, power) characteristics of the WFD.

What disperser bubbler has a contact surface with the liquid phase angle of the wetting liquid phase is less than 50 degrees, allows you to generate a larger number of smaller bubbles to provide the above technical result. In addition, the reduction of the pressure drop across the dispersant allows reducing unproductive losses of pressure in the bubbler and, accordingly, to increase the efficiency of the device.

What inlet port of the separator has a cross-section, flattened vertically, and the first output nozzle has a cross section elongated in the direction of motion of the liquid phase, provides a more rapid merger and consolidation pop-up bubbles in the line leading to the separator. These bubbles, uniting the upper wall is flattened from top to bottom supply line, getting into the cage, able to quickly flow into the fuel tank.

This increases the reliability of separation and ensures that the flow through the separator smallest bubbles. In this case, as already noted, is achieved by the above-mentioned technical result.

What is the ratio of the cross-section of the first output nozzle separator Routlongitudinal L3 and L4 transverse axes selected in the range Rout=L3:L4=1.8-2.2, increases the efficiency of the separation bubble size, improving the quality of the fuel.

What is the ratio of the length of the inlet fitting of the separator to its diameter selected within L:d=5.38-0.8 that allows you to adjust the sizes of the bubbles entering the cavitator, ranging from 30 to 500 μm, and to regulate the relative content of the gas phase in the liquid fuel.

In addition, the fact that the fuel tank with a volume flow rate Q at a rate of upwelling of the separated bubbles V made with the throat diameter d which is determined by the following relationship:

provide the formation of the gas valve in the throat of the fuel tank. This improves the quality of the separation bubbles before entering the cavitator, increases homogeneous the work.

The fact that the ratio of compressor capacity Qgasand volumetric fuel consumption Qtchoose from the condition that the coefficient of Qgas/Qtthe gas-filling of the liquid phase was not less than 15%, increases the quality of the fuel to provide the necessary intensity of the processes in the fuel when it is processed in the cavitator under conditions of shock-wave mode.

Thus, it is shown that the required technical result really is achieved due to the significant differences of the proposed installation.

The experiments showed the feasibility of the present invention.

Claims

1. Device for burning fuel containing connected in series compressor performance Qgasthe first valve and bubbler with located therein a dispersant, and a fuel tank with a volume flow rate of Qtthe second valve and the nozzle, characterized in that the separator bubbles and cavitator, and the inlet port of the separator is connected to the output of the bubbler, the first output nozzle separator is connected to the throat of the fuel tank, which is located in its lower part, a second output fitting stynen to the entrance of the nozzle.

2. The device under item 1, characterized in that the dispersant of the bubbler has a contact surface with the liquid phase, which has a wetting angle of the liquid phase is less than 50about.

3. The device under item 1, characterized in that the ratio of length L and diameter d of the input nozzle separator is selected in the range of L:d = 5,38-0,8.

4. The device under item 1, characterized in that the inlet port of the separator has a cross-section, flattened vertically, and the first output nozzle has a cross section elongated in the direction of motion of the liquid phase.

5. The device according to p. 4, characterized in that the ratio of the cross-section of the input nozzle separator Rinhorizontal L1 and L2 vertical axes selected in the range Rin=L1:L2=1.1 To 3.

6. The device according to p. 4, characterized in that the ratio of the cross-section of the first output nozzle separator Routlongitudinal L3 and L4 transverse axes selected in the range Rout=L3:L4=1,8-2,2.

7. The device according to p. 4, characterized in that section of the inlet fitting of the separator has a convex upper bound.

8. The device under item 1, characterized in that the ratio of compressor capacity Qgasand volumetric fuel consumption Qtchoose from the condition that the coefficient of Qgas/Qt



 

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