A fan rectifier with radially bifurcated blades and design method thereof
A design method and technology of rectifiers, applied in mechanical equipment, machines/engines, components of pumping devices for elastic fluids, etc., can solve the problems of deteriorating aerodynamic performance of fan rectifier blades and difficulty in blade arrangement, and achieve improved fan aerodynamics Performance, effect of improving tip consistency
Active Publication Date: 2015-10-07
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology
In order to pursue higher economy (high efficiency, low fuel consumption rate, etc.) The radius difference between the blade root and the blade tip is getting bigger and bigger. If the conventional rectifier blade layout is adopted, there will be a large difference between the blade root consistency and the blade tip consistency under the same number of blades. In order to meet the fan rectifier blade tip consistency requirements ( Choose a larger consistency to control the flow separation inside the rectifier to achieve a larger airflow turning angle) and the number of blades selected will cause a large consistency at the root, resulting in difficulty in arranging the blades on the small-sized rectifier wheel, and at the same time deteriorating the root of the fan rectifier blade Aerodynamic performance
Method used
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[0014] The present invention will be further described in detail below in conjunction with the examples, the following examples are explanations of the present invention and the present invention is not limited to the following examples.
[0015] Such as figure 1 As shown, the rectifier used in this embodiment for a turbofan engine fan with a large bypass ratio is composed of a rectifier inner ring 1 , a rectifier blade and a rectifier outer ring 4 . Each fan rectifier blade has a radially forked blade layout in space, including a forked blade 2 and a forked blade 3 . In order to effectively control the airflow separation at the tip of the rectifier without excessively increasing the consistency of the root of the rectifier blade (which is difficult to process and will deteriorate the performance near the root of the fan rectifier), a certain amount of The rectifier vane layout with radial forks composed of the bifurcated blade 2 and the bifurcated blade 3 .
[0016] figur...
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The invention discloses a fan flow regulator with radial branch blades and a method for designing the fan flow regulator, and belongs to the technical field of fans of aero-engines. The fan flow regulator is characterized in that radial branch blade arrangement is adopted for the fan flow regulator. The fan flow regulator and the method have the advantages that the fan flow regulator can be directly applied to a fan of a turbofan engine with a large bypass ratio, and the radial denseness of the blades of the fan flow regulator can be changed, so that the denseness of a tip of the turbofan engine with the large bypass ratio can be increased on the premise that the denseness of the roots of the blades of the flow regulator is guaranteed against being changed, a flowing separation effect on a top area of the fan can be controlled, and the pneumatic performance of the fan can be effectively improved.
Description
technical field [0001] The invention relates to a fan rectifier with a radially forked blade layout and a design method thereof, which can realize variable radial consistency of the rectifier blades, control flow separation in the top area of the fan rectifier, and greatly improve the aerodynamic performance of the fan, and is especially suitable for large culverts Dolby turbofan engine. Background technique [0002] The fan is one of the core components of a turbofan engine and one of the most difficult to design. Increasing the single-stage pressure ratio of the fan and reducing the structural weight are effective ways to increase the thrust of an aero-engine. Blade consistency has a significant impact on fan / compressor performance. Too many blades and increased blade surface area will lead to increased compressor loss, increased blockage, reduced flow, and worsened fan / compressor performance; and if too few blades, blades will As the load increases, flow separation is ...
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IPC IPC(8): F04D29/54
Inventor 卢新根张燕峰赵胜丰朱俊强
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI