Circulating type movable and stationary blade interference wake generating device

A generating device and cyclic technology, which is applied in the field of cyclic dynamic and stationary blade interference wake generation devices, can solve the problems of unstable blade movement speed and unstable blade inlet angle, and achieve the effects of easy adjustment, easy implementation and reduced impact.

Active Publication Date: 2018-10-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a circulating type interference wake generator for moving and stationary blades, which solves the problems of unstable blade inlet angle and unstable blade motion speed

Method used

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  • Circulating type movable and stationary blade interference wake generating device
  • Circulating type movable and stationary blade interference wake generating device
  • Circulating type movable and stationary blade interference wake generating device

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0045] Specific embodiment 1. By controlling the rotational speed of the speed-regulating motor, the speed at which the rotor blades pass through the stationary blades is controlled to achieve the control of the static and dynamic interference frequency. For example, control the speed of the speed-regulating motor so that the speed V of the vertical transmission belt is 2m / s, and the distance between adjacent moving blades is D=100mm, then the interference frequency of moving and stationary blades is V / D=20Hz.

specific Embodiment approach 2

[0046] Embodiment 2. By changing the installation angle of the rotor blade on the vertical transmission belt, the inflow velocity and the shape of the blade, and changing the inflow attack angle of the blade, the intensity of the rotor blade wake and the shedding frequency of the vortex can be controlled. For example, NACA0012 airfoil or NACA0024 airfoil can be selected, the installation angle α of the blade on the vertical conveyor belt is 60 degrees, the horizontal inflow velocity U is adjusted to 1m / s, and the vertical blade moving speed V is adjusted to 1m / s, then the moving blade The inflow attack angle θ of the blade is 15 degrees, such as Figure 9 shown.

specific Embodiment approach 3

[0047] Embodiment 3, by changing the clearance of the fixing hole of the transmission belt, the pitch of the rotor blades can be changed, and the number of wakes in a single stator blade flow channel can be controlled. For example, the distance between two adjacent rotor blades is 50mm, and the distance between two adjacent stator blades is 120mm, then there are two rotor blade wakes in a single stator blade when the rotor blade sweeps the stator blade.

[0048] In summary, the present invention can more accurately simulate the physical phenomenon of dynamic and static interference in turbomachinery, and can perform dynamic and stationary vane wake-boundary layer interference tests on the device of the present invention. The present invention can adjust the dynamic and stationary vane interference frequency, wake Intensity and number of wakes in a single vane runner at a fixed moment. It can well simulate the interference effect of the rotor wake on the flow field of the stato...

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Abstract

The invention discloses a circulating type movable and stationary blade interference wake generating device comprising a movable blade mechanism and a water tank assembly. The water tank assembly consists of an upper water tank, a lower water tank, and two intermediate water tanks. The upper water tank and the lower water tank are communicated mutually; the intermediate water tanks are installed at the two sides between the upper water tank and the lower water tank symmetrically; and stationary blades are installed in the intermediate water tanks serving as outlets. The movable blade mechanismconsists of a horizontal transmission belt, an upper transmission shaft, a vertical transmission belt, movable blades, a lower transmission shaft and a speed regulating motor; the speed regulating motor is connected with the upper transmission shaft by the horizontal transmission belt; the upper transmission shaft is connected with the lower transmission shaft by the vertical transmission belt; and each movable blade is hinged to the vertical transmission belt. According to the invention, wake generation is realized by the real airfoil movement and conforms to the circulating type movable andstationary blade interference phenomenon in the engineering practice well. The circulating type movable and stationary blade interference wake generating device has characteristics of high universality, simple installation, and convenient observation and the like.

Description

technical field [0001] The invention relates to a liquid flow generating device in the field of energy and power, in particular to a circulating type moving and stationary vane interference wake generating device. Background technique [0002] In many turbomachinery devices, due to the relative motion of the cyclic moving and stationary blades, the wake of the moving blade will affect the flow separation of the boundary layer of the stationary blade and the development of the vortex, and the cutting of the moving blade wake by the stationary blade will have a negative effect The flow field near the rotor blade. The study of this dynamic and static interference is of great significance to the safe, efficient and stable operation of turbomachinery. Experimental research is still an indispensable means for the study of static and dynamic interference, and it has the intuition and accuracy that numerical simulation does not have. The experimental devices mainly used at this st...

Claims

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Application Information

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IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 阮晓东张旭王鹏飞王嘉明许忠斌付新
Owner ZHEJIANG UNIV
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