SU1282913A2 - Vortex audio-signal generator - Google Patents

Abstract

The invention relates to a technique of powerful sources of acoustic energy and is an improvement of the known device according to ed. St. No. 1151328. The purpose of the additional invention is to increase the intensity of the generated sound due to the asymmetry of the peripheral flow by initiating in the paraxial region of the camera 1 a vortex of a powerful vortex helix cord formed by making the grooves 4 a depth equal to 0.8-0.8, 95 of their width, on the generatrix of the conical body 3 installed in the chamber. 3 il.

Description

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The invention relates to a technique of powerful sources of acoustic energy.

The aim of the invention is to increase the intensity of the generated sound due to the increased asymmetry of the peripheral flow.

FIG. 1 shows a diagram of a vortex sound generator; in fig. 2 is a diagram of the formation of small-scale vortex structures in the grooves; in fig. 3 is a diagram illustrating the principle of operation of the generator.

The vortex sound generator contains a cylindrical swirl chamber 1 with a tangential channel 2 for supplying the working fluid, a conical body 3 mounted on the end wall of the camera 1 coaxially with a base equal to (0.6-0.7) d and a height equal to (0, 5-0.7) d, where d is the diameter of the swirl chamber 1. On the conical surface of the body 3, grooves 4 are formed along its forming, representing in cross section a sector with a diameter equal to the width of the groove and a depth equal to 0.8-0.95 width.

Vortex sound generator works as follows.

The working fluid, entering a swirl chamber 1 through the tangential channel 2, forms a peripheral swirling flow in chamber 1. Due to

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The medium forms an axial counterflow to chamber 1. The peripheral flow flows around the conical body 3 along the spiral trajectory m and crosses the grooves 4 at an acute angle. As a result, in the grooves 4, small-scale spiral vortex structures are initiated and continuously maintained, moving along the grooves 4 in the direction of the top of the conical body. When running down from the top of the conical body 3, small-scale structures merge and clamp a powerful spiraling vortex hole, which is located at the interface between the direct current and the primieral countercurrent. The vortex spur, rotating around the axis of chamber 1, deforms the peripheral flow, causing periodic pulsations of velocity and pressure in it, which propagate into the environment in the form of sound vibrations.

Claims (1)

Invention Formula Vortex sound generator on aut. St. No. 1151328, characterized in that, in order to increase the intensity of the generated sound due to the increased asymmetry of the peripheral flow, on the conical surface of the conical te. The grooves are made along its formers; they are a section with a diameter equal to that between the surrounding medium and the width of the groove and the depth equal to the first region of the chamber 1 and the air from the surrounding area 0.8-0 95 wide. five 0 five 0 The medium forms an axial counterflow to chamber 1. The peripheral flow flows around the conical body 3 along the spiral trajectory m and crosses the grooves 4 at an acute angle. As a result, in the grooves 4, small-scale spiral vortex structures are initiated and continuously maintained, moving along the grooves 4 in the direction of the top of the conical body. When running down from the top of the conical body 3, small-scale structures merge and clamp a powerful spiraling vortex hole, which is located at the interface between the direct current and the primieral countercurrent. The vortex spur, rotating around the axis of chamber 1, deforms the peripheral flow, causing periodic pulsations of velocity and pressure in it, which propagate into the environment in the form of sound vibrations. Invention Formula Vortex sound generator on aut. St. No. 1151328, characterized in that, in order to increase the intensity of the generated sound due to the increased asymmetry of the peripheral flow, on the conical surface of the conical te. the grooves are made along its formers, which are across fT f0.8-0.95) 8 "T cffuff.2 sri.Z Compiled by A. Sostin Editor A. Lezhnin Tehred I.Popovich Proofreader T. Kolb Order 7322/5 Circulation 437 Subscription VNIIPI State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5