Low noise rudder blade surface structure for warship

Abstract

The invention discloses a low noise rudder blade surface structure for a warship. The low noise rudder blade surface structure for the warship comprises common elastic wing panels, an elastic bow wing panel and an elastic stern wing panel, wherein the common elastic wing panels are fixedly connected with a rudder blade shell plate by virtue of mounting screws, the elastic bow wing panel is fixedly connected with the rudder blade shell plate by virtue of mounting screws, and the elastic stern wing panel is fixedly connected with the rudder blade shell plate by virtue of mounting screws; and the common elastic wing panels are connected with the elastic stern wing panel in an overlapping and leaning manner, the common elastic wing panels are mutually connected in an overlapping and leaning manner, and the elastic bow wing panel and the common elastic wing panels are connected in an overlapping and leaning manner. The low noise rudder blade surface structure for the warship has the advantages that one group of detachable elastic wing panels which are mutually matched are mounted on a rudder blade, so that the rudder blade surface structure has certain elasticity, the drastic change of water pressure, caused by turbulent flow or eddy, of a rudder blade surface is relieved, and the water flow field of the rudder blade surface is improved by virtue of surface grooves of the elastic wing panels, so that anti-cavitation and eddy reducing properties of the whole rudder blade are improved, and the fluid noise of the rudder blade is reduced.

Description

technical field [0001] The invention relates to ship outfitting, in particular to a low-noise rudder blade surface structure for ships. Background technique [0002] At present, in order to obtain better maneuverability and control performance of ships, the rudder blades are often arranged in the high-speed wake behind the propeller. This is because the water velocity in the wake behind the propeller is relatively fast, and the rudder blade rotates at the same angle of attack in the wake with a certain side area. Compared with other underwater areas of the whole ship, the rudder blade can Generate greater fluid lift, thereby reducing the design size of the rudder blade, such as figure 1 shown. However, the flow field of the propeller wake is often unstable and uneven. When it scours the surface of the rudder blade, it is easy to produce cavitation effect or strong local turbulence, and thus generate certain resistance and fluid noise, such as figure 2 shown. In order to...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this technology is that the structural design and manufacture of the rudder blades are very complicated, and it cannot be guaranteed that the shape of the twisted rudder remains consistent with the changing flow field when the ship turns, that is, after the propeller wake flow field changes. still match, such as Figure 4 shown

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