Fan blade lattice tester and method for changing flow inlet angle of fan blade lattice

A cascade test, fan-shaped technology, applied in the direction of machine/engine, stator, engine components, etc., can solve problems such as poor technical feasibility, and achieve the effect of reducing materials, facilitating changes, and shortening experimental preparation time

Active Publication Date: 2020-04-28
SHENYANG AEROSPACE UNIVERSITY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The speed of the aero-engine exceeds 10,000 revolutions per minute, and the frequency of the wake after the experimental simulation of the vane must reach the real level of the engine. The small plate must move in a straight line at a very high speed, and the technical feasibility is poor.

Method used

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  • Fan blade lattice tester and method for changing flow inlet angle of fan blade lattice
  • Fan blade lattice tester and method for changing flow inlet angle of fan blade lattice
  • Fan blade lattice tester and method for changing flow inlet angle of fan blade lattice

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Embodiment Construction

[0116] Such as figure 1 , 2 , 3 and 17, the present invention proposes a fan-shaped cascade tester, at least including a fan-shaped cascade 25 simulating an engine turbine and an experimental section 20 upstream thereof, and a simulated stator disc for simulating a vane can be arranged between the two 2. There may be a pressure vessel chamber 40 containing them outside the above-mentioned components. The fan-shaped turbine cascade 25 is coaxial with the simulated stator disk 2, and the axis can swing within a certain angle range, forming a different air intake angle a with the outlet of the experimental section. For this reason, the experimental section includes replaceable building blocks, such as the inner surface The arched upper curved surface is formed by splicing oblique building blocks 29 and straight building blocks 28 etc., and the entrance and exit surfaces of the oblique building blocks 29 etc. have different hypotenuses so that the end of the flow channel and the ...

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Abstract

The invention relates to a fan blade lattice tester and a method for changing the flow inlet angle of a fan blade lattice, and mainly belongs to the technical field of pneumatic tests of turbine motors. The tester comprises the fan blade lattice and a testing section at least. The fan blade lattice comprises a fan disc and a blade mounted on the fan disc. A flow channel continuous in surface, smooth and free of wrinkles is arranged in the testing section. At least an upper curved plate or a lower curved plate of the testing section comprises building block units, and the building block units are spliced. According to the method, the airflow inlet angle of the fan blade lattice can be conveniently changed, and the airflow quality can be guaranteed. According to the fan blade lattice testerand the method for changing the flow inlet angle of the fan blade lattice, the flow channel formed by splicing the building block units can provide different flow inlet angles for the downstream fan blade lattice, the flow inlet angle can be adjusted flexibly with a small minute of angle, the material and process cost for manufacturing multiple transition sections is reduced, the test preparationtime is shortened, and the purpose of the fan blade lattice can be expanded.

Description

technical field [0001] The invention relates to a fan cascade tester and a method for changing the inlet angle of the fan cascade, which are mainly used in the technical field of turbine aerodynamic testing. Background technique [0002] Before the fan-shaped cascade inlet, there are generally two parts: the contraction section (convergence section) and the transition section. The constriction section (convergence section) first shrinks the circular pipe flow channel into a fan shape. The transitional section shrinks from a fan shape to a smaller fan shape, and more than one will be prepared. The article "Experimental Research and Numerical Simulation of Annular Cascade Aerodynamic Characteristics of Post-Loaded Cascade" reveals: "In order to be suitable for different cascades or different experimental inlet airflow angles, different experimental cascade heights, etc., the convergent should first converge to a The larger outlet, on this basis, converges from the transition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D9/04
CPCF01D9/041
Inventor 彭大维李国文李佳石李孟隆李承骏张硕
Owner SHENYANG AEROSPACE UNIVERSITY
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