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Variable geometric outlet vane

A technology of outlet guide vane and geometry, applied in non-variable pumps, components of pumping devices for elastic fluids, machines/engines, etc., can solve deviation from design conditions, exhaust diffusion section and combustion chamber flow Unfavorable effects and other problems, to achieve the effect of uniform flow field, improved efficiency, and improved economic benefits

Active Publication Date: 2016-06-29
SHANGHAI ELECTRICGROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for the outlet guide vane, it is necessary to consider the requirements of the combustion chamber and the exhaust diffuser section on the outlet airflow angle of the guide vane. If the outlet guide vane rotates as a whole, when the adjustment amount is too large, the outlet airflow angle of the guide vane will decrease. A large deviation from the design condition will adversely affect the flow of the exhaust diffuser and the combustion chamber. Therefore, it is best to design a segmented outlet guide vane, which can adjust the front section of the outlet guide vane and fix the rear section.

Method used

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Examples

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Embodiment 1

[0028] see Figure 1 to Figure 3 , The present invention discloses a compressor, including a cylinder 10, a hub 11, a moving blade 13, a stationary blade 14, an inlet guide vane 12, a variable geometry outlet guide vane 30, and a guide vane adjustment control system.

[0029] figure 1 A schematic diagram of the meridional flow of a compressor is shown, and the flow of the compressor is composed of moving blades 13, stationary blades 14, cylinders 10, and hubs 11. The gas flows through the inlet guide vane 12, pre-swirls to the rotor blade 13 at the outlet of the inlet guide vane 12, and then is compressed into a high-pressure gas in the rotor blade 13 and stationary vane 14, and the temperature rises accordingly. Compressed air flows in the channel between the hub 11 and the cylinder 10; the rotor blade 13 is installed on the hub 11, the stationary vane 14 is installed on the cylinder 10, and the air flow is in the channel between the blades of the rotor hub 14 and the hub 11...

Embodiment 2

[0041] In order to prevent the compressor from stalling or clogging when it operates under variable working conditions, and considering the requirements of the combustion chamber and the exhaust diffuser section on the airflow angle at the outlet of the guide vane, the outlet is designed to be adjusted in sections, the front section is adjustable, and the rear section is fixed. It can not only ensure that the inlet angle of attack will not be too large under non-design working conditions, but also avoid the adverse effect of the change of the outlet airflow angle on the flow of the exhaust diffusion section.

[0042] In this embodiment, the variable geometry outlet guide vane includes an adjustable inlet section and a fixed outlet section, and there is a gap between the trailing edge of the adjustable inlet section and the front edge of the fixed outlet section; the gap should not be too large or too small. The gap is composed of two sections of smooth curves, through which the...

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Abstract

The invention discloses a variable geometry outlet guide vane, the outlet guide vane includes an inlet adjustable section, an outlet fixed section, and there is a gap between the trailing edge of the inlet adjustable section and the front edge of the outlet fixed section; the gap is formed by Composed of two smooth curves, the pressure surface and the suction surface are connected through the gap. Using the pressure difference between the pressure surface and the suction surface, a small part of the air flows through the gap from the concave surface to the convex surface, so as to blow the boundary layer and reduce the loss. Increase the airflow turning angle. The variable geometry outlet guide vane of the compressor proposed by the present invention, by adjusting the position of the front part of the outlet guide vane, avoids flow separation or blockage due to the excessive The rear part of the guide vane remains stationary, and the rotation of the guide vane has little effect on the flow of the exhaust diffuser and the combustion chamber.

Description

technical field [0001] The invention belongs to the technical field of impeller machinery equipment, and relates to a compressor, in particular to a variable geometry outlet guide vane of the compressor. Background technique [0002] When the compressor operates under the design conditions, the fluid can be better attached to the airfoil, and no large separation will occur. However, when the compressor is running at a small flow rate, the inlet of the guide vane will have a large positive angle of attack, and the airflow will separate at the back arc of the blade shape. The separation zone will develop rapidly and severely with the increase of the angle of attack, eventually leading to the flow of the compressor. Stall; when the compressor is running at a large flow rate, a large negative angle of attack will appear at the inlet of the guide vane. When the negative angle of attack reaches a certain level, it will easily cause blockage of the blade passage and reduce the flow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/40
Inventor 徐强李华何磊
Owner SHANGHAI ELECTRICGROUP CORP
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