SU956351A1 - Water-jet propeller ejection device - Google Patents

Description

(5) WATER EJECTOR DEVICE

one .

The invention relates to shipbuilding. Ejector devices for jet propulsion devices are known that contain a water intake, a working tool and an output nozzle tl}.

The disadvantage of such devices is low hydrodynamic efficiency;

Closest to the described ejector device is the jet propulsion unit containing the inlet nozzle, ejector nozzle, mixing chamber and exit nozzle 2.:

Such a device is ineffective due to significant losses due to vortex formation due to the flow imbalance at the boundaries of the turbulent jets flowing from it.

The purpose of the invention is to increase the hydrodynamic efficiency of the jet, the mover.

For this, an ejector device is made with a peripheral confuser blade apparatus on the engine exit.

an ejector nozzle and with a diffuser blade apparatus behind the mixing chamber.

The drawing schematically shows a longitudinal section of the described device.

The device comprises an inlet section 1, a hydraulic pump 2, an ejector nozzle 3 with a confusor blade apparatus k at its exit, a mixing chamber 5 and an output nozzle 6 with a diffuser blading apparatus 7 with a chamber 5.

The described device works as follows. Water enters

15 to section 1 in which the stream is separated. A portion of the working fluid is directed to the hydraulic pump 2, which gives it the necessary amount of energy. From here the liquid comes

Claims (2)

2 (into the apparatus 4 at the exit of the nozzle 3, in which the energy obtained by the fluid in the hydraulic pump is converted into the kinetic energy of rotation of the active flow. The flow of the active fluid spun in apparatus k through the nozzle 3 enters the chamber 5 and begins to interact with the fluid flow, coming from area 1. Energy is transferred in chamber 5 due to the viscosity of the fluid in accordance with / by the law of conservation of the moment of momentum. The mixed rotating flow of fluid from chamber 5 enters nozzle 6 with apparatus 7, which is It converts the flow and converts the rotational motion of the fluid into a translational. From the nozzle, the fluid is ejected into the environment. The operation of the described device consists in using a rotating stream from the balance in the radius direction of the centrifugal forces. Due to this stability, the turbulization decreases at the interface of the flow, and the energy is transferred with less hydraulic losses, which is the techno-ecological effect of the introduction of this invented . The invention of the Eje (a jet propulsion device, comprising an inlet section, an ejector nozzle, a displacement chamber and an output nozzle, characterized in that, in order to improve the hydrodynamic efficiency of the jet propulsion unit, it is provided with a peripheral confuser blading apparatus at the outlet of the ejector nozzle and with a diffuser - blade apparatus located behind the mixing chamber.Sources of information taken into account during the examination 1.Kulikov S.V. and Khramkin MF Water-jet propulsion L., Sudostroenie, 1965, p. 2. German patent number 113b23b, cl. 65f, 6/30, published 1965 (prototype) I