Hydraulic model and design method of a pump-jet propeller with asymmetric circumferential arrangement of front stator

A symmetrical layout and hydraulic model technology, applied in the fields of instruments, computing, electrical digital data processing, etc., to achieve the effect of promoting popularization and easy expansion

Active Publication Date: 2019-01-11
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the above two patent schemes, the blade profile and pitch angle have not changed

Method used

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  • Hydraulic model and design method of a pump-jet propeller with asymmetric circumferential arrangement of front stator
  • Hydraulic model and design method of a pump-jet propeller with asymmetric circumferential arrangement of front stator
  • Hydraulic model and design method of a pump-jet propeller with asymmetric circumferential arrangement of front stator

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Embodiment Construction

[0049] Pass below Figure 1 ~ Figure 7 As well as enumerating some optional embodiments of the present invention, the technical solutions of the present invention (including preferred technical solutions) are further described in detail. Any technical features and any technical solutions in this embodiment do not limit the protection scope of the present invention .

[0050] The flow chart of the hydraulic model design method of the pump jet propeller with the front stator circumferentially asymmetrically arranged in the present invention is as follows Figure 7 As shown,

[0051] Step S1, select and design the hydraulic parameters of the pump fluid channel according to the design requirements;

[0052] In the selection and design, according to the ship water jet propulsion theory, the five parameters of the pump jet cascade channel's head, flow, outlet area, specific speed and suction port specific speed are determined by the rapidity requirements.

[0053] Step S2: Determine the tw...

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Abstract

The invention discloses a pumpjetpropulsor hydraulic model with front stators circumferentially and asymmetrically arranged and a design method thereof. The pumpjetpropulsor hydraulic model comprises stator blades, a stator hub, impeller blades, an impeller hub and a guide tube. The stator blades are circumferentially and asymmetrically arranged on the stator hub, and blade tips of the stator blades are fixed to the inner wall face of the guide tube. The axis of the stator hub, the axis of the impeller hub and the axis of the guide tube coincide. The impeller blades have the characteristics of large side skewing and tail longitudinal inclination. The pitch angles of the stator blades are changed according to the sine rule on the basis of the pitch angles of reference pumpjet stator blades, and the change quantity of the pitch angles is related to the circumferential angle positions of the stator blades, impeller turning directions and amplitude coefficients. According to the pumpjetpropulsor hydraulic model with front stators circumferentially and asymmetrically arranged and the design method thereof, the amplitude of pumpjet pulsation thrust coefficients can be reduced, pumpjet radiation noise is lowered, and the pulsation thrust coefficients of the pumpjet with the front stators circumferentially and asymmetrically arranged are reduced by 3.4% compared with a reference pumpjet under the same design condition. The technical measure is also suitable for noise optimization design of shaftless driving type integration motor pumpjet hydraulic models.

Description

Technical field [0001] The present invention relates to the technical field of ship propulsion, in particular to a pump jet propulsion device with low noise and high critical speed characteristics, which can be used for propelling an underwater vehicle. Background technique [0002] Pumpjet (Pumpjet, referred to as pump jet) is widely used in low-noise submarine propulsion because of its low radiation noise and high critical speed. For example, the "Seawolf-class" submarine and the "Virginia-class" submarine both use front Set stator pump spray. At present, the United States, Britain, France and Russia have all applied pump-jet propulsion technology to nuclear submarine propulsion. The main reason why pump-jet submarines have not been in service in China is the lack of excellent pump-jet hydraulic models. The specific meaning of excellent is: low radiation noise, moderate propulsion efficiency, high critical speed (that is, strong anti-cavitation ability) (a design method of a s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor 杨琼方王永生
Owner NAVAL UNIV OF ENG PLA
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