Novel low-noise highly-skewed ducted propeller

A technology of ducted propeller and large side tilt, which is applied in the direction of rotating propeller and rotating propeller to achieve the effect of reducing vibration and noise

Inactive Publication Date: 2015-03-18
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the improvement of the hydrodynamic performance and noise characteristics of underwater vehicles, the commonly used propellers such as ducted propellers and ordinary propellers can no longer fully meet the needs.

Method used

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  • Novel low-noise highly-skewed ducted propeller
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  • Novel low-noise highly-skewed ducted propeller

Examples

Experimental program
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Effect test

Embodiment example

[0077] (1) Case 1

[0078] For a certain unmanned aerial vehicle, the present invention is adopted as its propulsion device. The diameter of the propeller is 372mm, and the number of blades is 7. The propeller parameters are determined by the following table:

[0079] Table 3.1 Geometric elements of the propeller in Embodiment 1

[0080] Location pitch ratio Side Slope trim ratio Chord ratio camber ratio Maximum Thickness Ratio r / R P / D θs(°) x R / D C / D f m / C t m / C 0.2 1 -14.7 0.002 0.190 0.0377 0.2633 0.3 1 -20.9 -0.004 0.208 0.0346 0.2046 0.4 1 -21.7 -0.013 0.222 0.0309 0.1655 0.5 1 -17.5 -0.026 0.234 0.0272 0.1414 0.6 1 -10.9 -0.033 0.242 0.0238 0.1207

[0081] Location pitch ratio Side Slope trim ratio Chord ratio camber ratio Maximum Thickness Ratio r / R P / D 0s(°) x R / D C / D f m / C t m / C 0.7 1 -3.5 -0.033 0.243 0.0213 0.1049 ...

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Abstract

The invention discloses a novel low-noise highly-skewed ducted propeller. The features of a highly-skewed propeller and the features of a ducted propeller are combined, and the form of the highly-skewed propeller is introduced on the basis of the ducted propeller; the seven-blade highly-skewed propeller with low vibration and noise serves as a propeller portion of the novel low-noise highly-skewed ducted propeller, the line type of the seven-blade highly-skewed propeller is optimized, and therefore the seven-blade highly-skewed propeller can be matched with a duct and a propeller cap in a coordination mode, the effect that underwater vibration noise of propellers is lowered is achieved, and water power, strength and other performance are guaranteed. The novel low-noise highly-skewed ducted propeller can serve as a low-noise propeller of an underwater vehicle and can also be used by submarines needing to navigate in a low-noise state and torpedoes needing to navigate in a low-noise state.

Description

Technical field: [0001] The patent of the present invention relates to a low-noise thruster for underwater vehicles (including unmanned underwater vehicles (UUV), autonomous marine vehicles (AUV) and remote-controlled underwater vehicles (ROV), etc.), called It is a low-noise large-slope ducted propeller, which can also be used for submarines or torpedoes that need to sail in a low-noise state. Background technique: [0002] Underwater vehicle is a vehicle that undertakes various tasks such as marine survey, marine exploration and development, underwater detection, navigation, communication, operation under dangerous conditions, emergency rescue and salvage, and can be used repeatedly. sex and flexibility. [0003] As an important part of underwater vehicle, propeller has a great influence on its performance. With the improvement of hydrodynamic performance and noise characteristics requirements of underwater vehicles, propellers such as ducted propellers and ordinary prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63H1/14B63H1/16B63H1/26
CPCB63H1/14
Inventor 方斌周其斗
Owner NAVAL UNIV OF ENG PLA
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