Acoustic fuel injector

 

Acoustic fuel injector, mainly for gas turbine engine and fuel technological device comprises a cylindrical vortex chamber with attached fuel nozzle and tangentially directed through the side wall of the primary and secondary gas nozzles, the output nozzle. Additional gas nozzle is in the form of tangential grooves directed in the same direction as the main, and located in front of the outlet nozzle. The ratio of the diameter of the vortex chamber to an equivalent diameter of the gas nozzle is selected from the correlation protected by the present invention. The invention increases the capacity of the acoustic oscillations and allows you to adjust the settings of the fuel torch. 2 C.p. f-crystals, 3 ill.

The invention relates to the field of energy and can be used in devices for fuel combustion, mainly in gas turbine engines and in the process furnace devices.

Known acoustic fuel injector containing a cylindrical vortex chamber with attached fuel nozzle and tangentially directed through the side wall of the primary and secondary gas barking power acoustic oscillations and the inability to control the angle and length of the fuel torch, what is necessary in case of use of the nozzles in a particular combustion chamber of a gas turbine engine or furnace space systems.

Task to be solved by the present invention is directed, is to increase the capacity of acoustic oscillations and the ability to control parameters of the fuel torch.

The problem is solved due to the fact that the fuel injector acoustic, mainly for gas turbine engines and furnace technology devices containing a cylindrical vortex chamber with attached fuel nozzle and tangentially directed through the side wall of the primary and secondary gas nozzles, the output nozzle, gas nozzle is in the form of tangential grooves directed in the same direction as the main, and located in front of the outlet nozzle, and the ratio of the diameter of the vortex chamber to an equivalent diameter of the gas nozzle is selected from the relationwhere n is the number of gas nozzles, d_e- equivalent diameter of the gas nozzleD is the diameter of the vortex chamber, F is the total area of the main and additional gazopa may be made removable for adjusting the length of the flame by changing the diameter of the exit nozzle.

The problem is solved also due to the fact that the tangential grooves made of rectangular shape.

In Fig.1 presents a General view of the acoustic fuel injector of Fig.2 - section a-a of Fig.1, in Fig.3 - section b-B of Fig.1.

Acoustic fuel injector comprises a cylindrical vortex chamber 1 with tangentially directed into the side wall of the gas nozzles 2 and the fuel nozzle 3. On the slice nozzle installed output nozzle 4, wherein before the output nozzle 4 there are additional gas nozzle in the form of a rectangular tangential grooves 5 directed in the same direction as the main gas nozzle 2. Output nozzle 4 is attached to the cylindrical vortex chamber 1 through the Union nut 6, which allows you to easily replace the nozzle 4 on the same with a different diameter 7.

When the supply of compressed gas (water vapour, air) through the main gas nozzle 2 and the additional gas nozzle in the form of rectangular grooves 5 in the cylindrical vortex chamber 1 in the last acoustic oscillations occur, destroying the particles of the fuel flowing in the cylindrical vortex chamber through the fuel nozzle 3, for small drops. The output from the output nozzle 4 is formed fuel torch, root Pravlenie rectangular grooves 5, and the length of the fuel plume is governed by the diameter 7 of the output nozzle 4. The increasing size of the tangential rectangular grooves 5 leads to a decrease of the angle of the torch, and the increase in the diameter 7 of the output nozzle 4 reduces the length of the fuel torch.

Compressed gas through these tangential rectangular grooves 5, you can affect the value of the root angle of the fuel spray. In addition, an advanced acoustic fuel injector equipped with easily removable outlet nozzle 4, which allows changing the diameter of the outlet, to influence the length of the torch. It is sometimes necessary to use the injector in the combustion device and the combustion chambers of gas turbine engine.

Maintaining specified in the formula of the ratio between the geometrical dimensions of the acoustic fuel injector and perform additional tangential rectangular grooves 5, unidirectional main gas nozzles 2, allow the maximum use of the energy of compressed gas to provide a high fineness of the spray of fuel, which is especially important in the case of use as a fuel viscous liquids, such as oil.

Claims

1. the second device, containing a cylindrical vortex chamber with attached fuel nozzle and tangentially directed through the side wall of the primary and secondary gas nozzles, the output nozzle, wherein the gas nozzle is in the form of tangential grooves directed in the same direction as the main, and located in front of the outlet nozzle, and the ratio of the diameter of the vortex chamber to an equivalent diameter of the gas nozzle is selected from the relationwhere n is the number of gas nozzles;
d_e- equivalent diameter of the gas nozzle,

D is the diameter of the vortex chamber;
F - the total area of main and secondary gas nozzles;
=3,14.

2. Acoustic fuel injector under item 1, characterized in that the output nozzle is made removable to adjust the length of the flame by changing the diameter of the exit nozzle.

3. Acoustic fuel injector under item 1, characterized in that the tangential grooves made of rectangular shape.