The method of transportation of gaseous material

 

(57) Abstract:

Usage: the invention can be used in the petrochemical and gas industry, mechanical engineering, in the exhaust ducts of internal combustion engines. The inventive increase the gas flow rate due to a change in flux density in the cross section and the lower static pressure on the axis of the pipeline. The reduction of pressure on the pipeline axis is achieved by rotation of the peripheral layers of gas, resulting in a reduction in the power consumption from the periphery to the longitudinal axis of the pipeline. 2 Il.

The invention relates to a technique of transportation, in particular for transporting gas through the exhaust pipe into the car.

The expiration of the gaseous mixture through the pipeline is carried out in the presence of differential pressure at a certain length. The more the ratio of the total gas pressure to static pressure at the outlet (cut), the greater is flow flowing stream of gaseous material. The decrease in the total pressure of the gas causes the reduction of its consumption at the expiration of the pipeline with a constant density flow in cross section.

The known method transporttasche and its movement with the density change of the flow cross-section on the section of highway (ed. St. USSR N 1634946, CL F 17 D 1/14, 1991).

The constancy of the density of the material consumption is provided an automatic change in the cross-sectional area of the pipeline fluctuations in the values of total pressure, or fluctuations in static pressure at the outlet. Such conditions of transportation of the material created due to the flexibility (deformation) of the elements of the inner wall of the pipe (mounting tubes from strips of sheet material) with a longitudinal overlap between the self and the rigid connection of the external longitudinal edges covering the base (outer pipeline). There is a method of transportation requires the creation of hard (core) support one part of the pipeline and the other (internal) flexible in the transverse (radial) direction. This method requires expensive manufacturing process the manufacture of tubing, having a combination of hard (over) part of the pipeline and specially made flexible (internal) in the transverse direction integral part of the pipeline In the known solution is the transportation of the material in the form of a mixture. Transportation of materials in the form of a mixture by pipeline associated with the pulsation of the flow of impermanence odniesieniu short-term boost by increasing the operating pressure at the inlet. Such changes in pressure at the input cause radial deformation of the longitudinal plates of the inner flexible pipelines. Excessive back pressure at the inlet (increase of working pressure) causes and increase the flow of the pressurized working medium (gas, liquid) and in turn occur in a certain way increasing the density of the transported mixture of material in the pipe cross section. For such a working environment, such as gas, there is a tenfold margin changes its density in the cross section (Polytechnical dictionary, M. Soviet encyclopedia, 1980, S. 99). With respect to the exhaust gas of the vehicle there is also a mixture of the material, which is formed at the stage of submission to the working cylinders of the internal combustion engine (fuel injection air), and at the stage leakage from the cylinder after incomplete combustion of the combustible mixture. Transportation by pipeline (exhaust pipe) forced out of the cylinders of the engine materials in the form of a mixture associated with certain overcoming resistance to movement of the mixture, i.e. at the inlet of the exhaust pipe is formed working pressure with a corresponding movement of the piston in the cylinder. Useful work of the piston in the cylinder uzyskanie methods of transporting materials by pipeline with less operating energy for the process of discharge of the working environment is important. In a known solution (prototype) this task has not found its implementation as part of the work of the energy consumed by the deformation of the flexible longitudinal plates in the cross section of the transported material in the form of a mixture.

In this invention a method of transporting gaseous materials is carried out with a number of technological features. The technical essence of the method consists in the following. Carry out the injection of gaseous material under pressure at the inlet pipe section, move it (the material) with a constant density flow in each cross section at intermediate pipe section and the output section of the pipeline change the density of the flow of material in the cross section of the pipeline. This reduces the density of the flow of gaseous material in the center of the pipe cross section and provide conditions for increasing the density of the flow at the peripheral part of the same cross-section. Such conditions created by the reduction in static pressure at the exit of gaseous material from the pipeline by bringing the rotation of the peripheral part of the flow. Given the rotation of the peripheral flow creates centrifugal Silene on the axis (center of the cross section) of the pipe increases flow of gaseous material at a constant pressure (or decrease in the total pressure of the gas at constant flow rate). Thus, changing the static pressure on the axis of the pipeline at the expiration of the atmosphere, it is possible to achieve cost reduction work on the compression of the gas at constant flow rate or increasing the gas flow rate at constant cost. The fundamental difference between the proposed method from that used at the present time, under the pressure difference expiring flow and pressure, which is the issue, is that the pressure on the cut pipe installed below the ambient pressure.

In Fig. 1 shows a cross-section of the outlet part of the pipeline of Fig. 2 is a view along the axis of this part with the image elements for the peripheral turbulence of the gas stream.

Diagram of the device for increasing the flow of gas at constant pressure (reduction of the total pressure at constant gas flow) contains intermediate part 1 and the end part 2 of the pipeline (Fig.1) and the blades 3 guide vanes for swirling the peripheral part of the gas flow (Fig.2).

Substantiation of the design parameters of the device for increasing the flow of gas at constant pressure is provided in the following calculation dependencies.

Gasodynamic the>1,

where Pandatmospheric pressure (pressure environment, which is the outflow of gas, PA, n/m2);

P01the total pressure of the gas at the entrance of the guide apparatus (PA, n/m2);

Statistical gas pressure on the axis of the feed device for the guide vanes to define dependencies

P2=Pa(1)

and gas-dynamic function on the same axis is characterized by the equality

(2)=P2/P01< / BR>
and the ratio of the gas velocity on the axis to define dependencies

< / BR>
where K is the adiabatic exponent.

The expenditure of gas-dynamic function on this axis is characterized by the equation:

< / BR>
The gas flow through the hole in the guiding device to define dependencies

< / BR>
where m expenditure coefficient of gas (air m 0,04);

F2=d2/4 square holes in the guiding device;

d the diameter of the hole in the guiding device (M);

T01full gas temperature before guiding device (K);

The ratio of the gas velocity at the outlet of the guide vanes is calculated from the equation

< / BR>
The expenditure of gas-dynamic function output (the cutoff line of the guide and is from

< / BR>
where D is the diameter of the outer guide vane (M);

Evaluation of the increase of gas flow through the hardware device is carried out relations

< / BR>
The developed method of transportation of gaseous materials is compared with an existing method with the following benefits:

the cost reduction work on gas compression;

increasing thermodynamic efficiency of the cycle;

reduction of fuel consumption in the automotive and gas turbine engines by reducing the required work on the organization of the exhaust or increases the useful power at constant fuel flow;

the exhaust gas from the engine is also significantly fewer impurities toxic gases due to improved conditions for the displacement of the burned mixture from the cylinder.

The method of transportation of gaseous materials, which consists in forcing gas under pressure into the pipeline and the change in density of the flow of gaseous material through the cross-section of the pipeline at any stage, this creates a reduction in the power consumption from the periphery to the longitudinal axis of the pipe, characterized in that the transportation of gaseous materiau section to create the output pipe section, the pressure on the cut pipe installed below the ambient pressure.

 

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