Marine high-speed pump water spraying force model for blade load fine control and design method thereof

Abstract

The invention discloses a marine high-speed pump water spraying model for blade load fine control and a design method thereof. The marine high-speed pump water spraying force model comprises a front stator, a rear rotor and a guide pipe; like a pump spraying structure arrangement for propelling a medium-low speed submersible vehicle, when the blade profile of the stator blade is designed, the blade section load distribution adopts a three-section control rule, and the blade section load distribution of the rotor blade adopts a B-spline fine control rule, so that the requirements of high navigation speed anti-cavitation performance and noise control are met. According to the invention, the power density is greatly increased, two technical measures of blade load distribution fine control andstator and rotor blade reverse skewing are introduced, the cavitation inception critical navigational speed is significantly improved, the unsteady force is controlled, and the pump jet is expanded to the propulsion application of medium and high speed surface ships for the first time. The primary principle of the design is transferred from low noise to cavitation resistance. The two new technical measures are also suitable for submersible vehicle mechanical pump spraying and shaftless pump spraying design, and popularization and application of pump spraying on water surface and underwater propulsion systems can be rapidly promoted after popularization and application.

Description

technical field [0001] The invention relates to the technical field of ship propellers, in particular to a pump-jet propulsor which has excellent anti-cavitation performance and suppresses unsteady force and can be used to propel high-speed surface ships, and in particular relates to a blade load fine-control and stator-rotor blade High-speed pump injection with reverse side slope and its design method. Background technique [0002] Pumpjet propulsion (Pumpjet, referred to as pumpjet) has the remarkable characteristics of low radiation noise and high critical speed, and is currently widely used in low-noise submarine propulsion, such as "Seawolf-class" submarines, "Virginia-class" submarines and "Northern-class" submarines. Wind God" class submarine. Invention patent "A pump jet hydraulic model with asymmetric circumferential arrangement of front stator and its design method (CN 105117564B, authorized time: 2018.10)" discloses a type of pump jet used for low-noise propulsio...

AI Technical Summary

Problems solved by technology

The advantage of this control method is that it is easy to set up and intuitive, and it can take into account the performance requirements of efficiency and cavitation on the whole. Control the local load distribution of the blade. For example, it is desired to change the upper convex parabola in the first section to a lower concave parabola to minimize the load distribution near the leading edge and avoid a small amount of local cavitation at the leading edge of the blade. Maximize cavitation initial speed

Furthermore, in the Chinese patent network, the key words "blade load fine control" and "stator rotor blade reverse skew" were searched, but no relevant patents were retrieved; in addition, in the international patent network with "Blade loads controlling Precisely (fine control of blade load)" is the keyword search, only 2 US patents are directly related

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