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A fan-shaped cascade tester and a method for changing the fan-shaped cascade inlet angle

A cascade test, fan-shaped technology, applied in the direction of machines/engines, stators, mechanical equipment, etc., can solve problems such as poor technical feasibility, achieve the effect of reducing materials and shortening test preparation time

Active Publication Date: 2022-04-29
SHENYANG AEROSPACE UNIVERSITY
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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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  • A fan-shaped cascade tester and a method for changing the fan-shaped cascade inlet angle
  • A fan-shaped cascade tester and a method for changing the fan-shaped cascade inlet angle
  • A fan-shaped cascade tester and a method for changing the fan-shaped cascade inlet angle

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specific Embodiment

[0115] 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 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. The tester at least includes a fan-shaped cascade and a test section, the fan-shaped cascade includes a fan-shaped disk and blades installed on the fan-shaped disk; the test section is a continuous, smooth and wrinkle-free flow channel on the inner surface. In the experimental section, at least the upper curved plate or the lower curved plate contains building block units, and the building block units are spliced ​​with each other. The method can conveniently change the airflow inlet angle of the fan cascade and can guarantee the airflow quality. The flow channels spliced ​​by the building block units in the present invention can provide different intake angles for the downstream fan cascades. And it can be adjusted flexibly with a very small indexing angle, which reduces the material and process costs for manufacturing multiple transition sections, shortens the test preparation time, and expands the use of fan-shaped cascades.

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 shrinkage section (convergence section) first shrinks the circular tube 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 se...

Claims

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Application Information

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Patent Type & Authority Patents(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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