Efficient pneumatic duct body

A ducted, high-efficiency technology, applied in the field of high-efficiency aerodynamic ducted bodies, can solve the problems of high manufacturing process and structural deformation accuracy, great influence on ducted rotor aerodynamic performance, and inhalation of debris such as sand, stones, branches and leaves, etc., to achieve reduction Effects of propeller tip aerodynamic loss, suppression of surrounding flow environment, and increase of lift force

Active Publication Date: 2017-05-10
HUNAN INTELLIGENT THINGS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the gap between the duct body and the rotor (or propeller, fan, hereinafter collectively referred to as the rotor) blade tip has a great influence on the aerodynamic performance of the entire ducted rotor. Although the smaller the better, the gap is too small for the manufacturing process and structural deformation accuracy requirements. High, as a lift system and exposed ducts (may inhale debris such as sand, stones, branches and leaves), it is difficult to make the gap small (the centimeter level is reduced to the millimeter level)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The opening is located on the duct body, and the opening and closing of the duct opening can be realized by moving the opening mask up and down.

[0033] The shape of the opening can be rectangular, circular, oval, arc or fan-shaped,

[0034] The size is: distributed around the duct body, the length is not limited, but it cannot be all connected into one piece (this will divide the duct body into upper and lower parts, and leave the upper and lower parts of the duct body connected to the reinforcing ribs, the height of the opening is different More than 1 / 2 of the duct body height.

[0035] The opening switch is manipulated by a steering gear or a mechanical linkage to move the opening mask up and down, and the moving distance is basically the height of the opening mask.

[0036] Due to the suction effect of the duct, the low-pressure area formed at the lip of the duct is the main reason for the additional lift generated by the duct, and part of the inner wall of the d...

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PUM

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Abstract

The invention relates to an efficient pneumatic duct body. On the premise of guaranteeing the duct lip shape unchanged, the inner wall of the duct is slotted; on the one hand, the weight of the duct body is reduced while effective load is increased; and on the other hand, the fan radius in the duct is increased so as to boost the lift force generated by the fan, and meanwhile, the flowing-around environment of the tip is effectively inhibited, the tip loss of the fan is reduced, and the fan efficiency is improved. With a switch, an opening operation can be performed at the duct body, and the duct lift force system reduces the momentum drag and parasite drag so as to adapt to the efficient pneumatic state of an aircraft during vertical flight and forward flight.

Description

technical field [0001] The invention belongs to the fields of aircraft design, product and system integration, automobiles, general aircraft, and transportation, and in particular relates to an efficient aerodynamic duct body. Background technique [0002] Compared with an isolated fan with the same diameter, under the same power consumption, the duct suppresses the flow around the fan tip, thereby reducing the loss of the tip and reducing the energy loss of the wake. The lip forms a low-pressure area, so that the duct itself can provide part of the additional lift. In addition, due to the protection of the duct, the aerodynamic noise of the fan is significantly reduced, and the safety of the fan is improved. Therefore, the ducted rotor acts as a thrust Or lift device, which has a good application prospect, focuses on low-altitude flight, and even ducted aircraft with vertical take-off and landing and hovering functions and ducted flying cars for land and air have appeared o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C11/00
CPCB64C11/001Y02T50/40
Inventor 聂洪山朱清华
Owner HUNAN INTELLIGENT THINGS TECH CO LTD
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