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Blade for a fan of a turbomachine, notably of the unducted fan type, corresponding fan and corresponding turbomachine

A kind of fan and turbine technology, applied in the field of fans, can solve the problems of deteriorating turbine efficiency and unsatisfactory

Active Publication Date: 2014-07-23
SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A significant reduction in downstream blade height (corresponding to significant clipping) requires an increase in the chord associated with the downstream blade in order to maintain the load, which degrades the efficiency of the associated turbine and is therefore not satisfactory

Method used

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  • Blade for a fan of a turbomachine, notably of the unducted fan type, corresponding fan and corresponding turbomachine
  • Blade for a fan of a turbomachine, notably of the unducted fan type, corresponding fan and corresponding turbomachine
  • Blade for a fan of a turbomachine, notably of the unducted fan type, corresponding fan and corresponding turbomachine

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Embodiment Construction

[0033] figure 1 Schematically shows a turbine according to the invention with a ductless fan 1, from upstream to downstream in the direction of gas flow inside the longitudinal axis L-L turbine (indicated by arrow F), comprising: a compressor 2, an annular The combustion chamber 3 , the high-pressure turbine 4 and the two counter-rotating low-pressure turbines 5 and 6 , that is to say the two low-pressure turbines 5 and 6 rotate in two opposite directions about the longitudinal axis L-L.

[0034] Each of the low-pressure turbines 5 and 6 is fixed in rotation to an external fan 7, 8 extending radially outside the nacelle 9 of the turbine 1, which is substantially cylindrical and surrounds the compressor 2, combustion Chamber 3 and turbines 4, 5 and 6 extend. Combustion gases from the turbine are expelled through nozzles 10 to increase thrust.

[0035] The fans 7 and 8 are arranged coaxially one behind the other and comprise a plurality of blades 11A and 11B equiangularly dist...

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Abstract

Blade for a fan of a turbomachine, notably of the unducted fan type, corresponding fan and corresponding turbomachine. According to the invention, the blade (11A) comprises means (16) arranged, at a single location, so that they locally, as the fan (7) rotates, disturb the distribution of flow around the blade (11A) so as to form two independent main vortices downstream.

Description

technical field [0001] The invention relates to a blade for a turbofan, in particular for a turbofan of the ductless fan type, a corresponding fan and a corresponding turbine. Background technique [0002] Although the invention is particularly suitable for turbomachines with unducted fans (also described as "open rotors"), its use is not limited to such applications. [0003] As is known, a turbine with an unducted fan may comprise two coaxial and counter-rotating outer fans upstream (front) and downstream (rear) respectively, both of which are alternately driven by the turbine and which have a substantial diameter outside the turbine nacelle. extend to the ground. Each fan generally includes a rotor hub concentric with the longitudinal axis of the turbine to which the blades are fixed. [0004] However, the aerodynamic action between the upstream and downstream counter-rotating fans of such a turbine with unducted fans produces high operating sound levels. In practice, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C11/18B64C27/467F01D5/14
CPCF01D5/141F01D5/145B64C2003/148F05D2220/325F05D2220/324B64D2027/005Y02T50/60B64C11/18B64C11/48
Inventor 劳伦斯·维扬格里高里·德拉特劳伦特·杰奎因贝诺伊特·罗德里格斯罗南·博依萨德比尔·俄图法布里斯·法利萨德
Owner SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A