SU1206557A1 - Injector - Google Patents

Description

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The invention relates to devices for spraying liquids, in particular liquid fuels, and can be used in the energy, chemical and metallurgical industries.

The purpose of the invention is to increase the power of the nozzle by increasing the working pressure of the sprayer and increasing the dispersion and spray uniformity.

FIG. 1 shows a nozzle, a longitudinal section; in fig. 2 shows section A-A in FIG. in FIG. 3 shows a section BB in FIG. one .

The nozzle contains coaxially mounted pipes 1 and 2, forming channels for the fuel and sprayer, respectively, and vortex chambers 3 and 4 with rows of cavity cavities 5 and 6 in their walls opposite which tangential nozzles 7 and 8 are located, connected to the corresponding channels.

Tangential nozzles 7 and 8 are connected at acute angles to each other and to cavities-resonators 5 and 6, and the latter are located tangentially to vortex chambers 3 and 4. Copper 7 and 8 can be narrowed downstream.

The nozzle works as follows.

Liquid fuel through pipe 1, which forms the channel for fuel, flows through tangential nozzles 7 into the swirl chamber 3 .. Each pair of nozzles 7 forms a generator of high-frequency pressure pulsations. At the meeting place of two equivalent fluid flows, mutual equal alternating inhibition occurs with the formation of powerful oscillations. The direction of flow of fluid from each pair of nozzles 7 with respect to the vortex chamber 3 is tangential. The number of pairs of nozzles 7 and their dimensions depend on the performance of the nozzle, as well as on its design. The tangential injection of fluid into the vortex chamber 3 provides for the creation of a swirling flow of fuel. The near-wall fluid flow in the vortex chamber 3 ensures the coordination of the operation of several sources of high-frequency oscillations. At the same time, the distance between the exit channels of each source along the inner wall of the vortex chamber 3

065572

must be chosen equal to the integer number of wavelengths of oscillations generated.

Thus, a swirl vortex-fluid generator is formed. Ultimately, a high-turbulent swirling fluid flow is formed with superimposed high-frequency pressure pulsations, which, due to the difference in pressure, leaves the vortex chamber 3 and forms a thin pulsating sheet of liquid at the exit, which disintegrates into small droplets. High15 frequency oscillations in the flow of a liquid lead to the occurrence of cavitation phenomena, which contribute to the destruction of the flow of liquid into small droplets, and also increase the degree of

20 fluid flow interactions with

sprayer, which also contributes to a smaller dispersion and mixture formation.

Spray Flow (Gas or Steam)

25 is fed through an annular channel formed by the cylindrical surfaces of the pipes 1 and 2 and flows through the nozzles 8 into the vortex chamber 4, and a vortex-generator of the nebulizer is formed similarly to the fuel swirler. At the exit of it, a high-velocity gas stream is formed with superimposed high-frequency pulsations, which interacts with the liquid swaddling and droplets formed from its collapse. The result is a fine, uniform mixture of fluid with a spray. The degree of dispersion of the liquid increases dramatically when the oscillation frequencies of the liquid and gas are close or differ from each other by an integer number of half-waves. In this case, a resonance occurs between two oscillating systems — a fluid flow and a gas flow, with the result that the jet of liquid is intensively destroyed to a mist-like state.

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The proposed nozzle makes it possible to increase the efficiency of the operation of topoi devices by increasing the dispersion and spray uniformity, improving the mixing process, reducing the specific steam consumption for spraying, and also increasing the efficiency of burning liquid fuels.

AK

5-6

FIG. 2

Editor O. Bugir

Compiled by L. Bulynko Tehred Z. Kastelevich

Order 8687/39

Circulation Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

5

Proofreader M.Maksimishinets

Claims (1)

NOZZLE, containing coaxially mounted pipes forming channels for fuel and atomizer, and vortex chambers with rows of cavity-resonators in their walls, opposite which there are tangential nozzles connected to the corresponding channels, characterized in that, in order to increase the power of the nozzle by expanding the working pressure of the atomizer and increasing dispersion and uniformity of the spray, tangential nozzles connected in pairs at sharp angles to each other and to the cavity-resonators, and the latter are located tangent to their original size. Figure 1 SU ,, .. 1206557