A Boundary Condition Simulation Device for Acoustic Closed-End Inlet of Liquid Flow System

Abstract

The invention discloses a simulating device for acoustic closed end inlet boundary conditions of a fluid flow system and relates to the field of simulating devices for acoustic closed end inlet boundary conditions. The simulating device comprises a recession cone, a throttle pipe, a diverging cone and a porous diffuser grid, wherein the throttle pipe is of a hollow cylindrical structure; the recession cone and the diverging cone are both in hollow conical structures; the recession cone is fixedly arranged at one axial end of the throttle pipe along the axial direction; in addition, the axialminor-diameter end of the recession cone is fixedly connected with the throttle pipe; the diverging cone is fixedly arranged at the other axial end of the throttle pipe along the axial direction; theaxial minor-diameter end of the diverging cone is fixedly connected with the throttle pipe; the porous diffuser grid is horizontally and fixedly arranged on the major-diameter end face of the diverging cone; besides, the porous diverging cone covers a through hole opening of the diverging cone; the major-diameter end of the recession cone is an inlet section; and the major-diameter end of the diverging cone is an outlet end. According to the simulating device disclosed by the invention, the problems that a traditional structure for simulating the acoustic closed end has over-great flow resistance and is seriously corroded are solved.

Description

technical field [0001] The invention relates to the field of an acoustic closed-end inlet boundary condition simulation device, in particular to a liquid flow system acoustic closed-end inlet boundary condition simulation device. Background technique [0002] In the pump-pressed liquid rocket engine, the centrifugal pump is used as the inlet boundary of the delivery system after the pump. Due to the high-speed rotation of the centrifugal pump blades, the internal flow velocity of the blades is very high and the inertia of the fluid is large, making the centrifugal pump close to the acoustic closed end of constant flow. Boundary conditions. When simulating the outlet boundary strip of a centrifugal pump on a liquid flow test bench, according to the traditional method of simulating boundary conditions, only a throttle ring with a large pressure drop is set, and a throttle orifice with a large flow resistance needs to be designed at the inlet of the liquid flow test bench , th...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, provide a liquid flow system acoustic closed-end inlet boundary condition simulation device, and solve the problem of excessive flow resistance and serious cavitation of the traditional structure for simulating the acoustic closed-end

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