Method for optimizing power generation performance of wind turbine generator under low air density

A technology of air density and wind turbines, applied in design optimization/simulation, electrical digital data processing, computer-aided design, etc., can solve the problem that wind turbines cannot maintain the maximum power generation

Pending Publication Date: 2020-10-30
ZHEJIANG WINDEY
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention mainly solves the problem that the wind turbine may not be able to maintain the maximum power generation after the installation of the vortex generator, and provides the distribution function of the chord length and twist angle of the blade airfoil obtained based on the classical momentum blade element theory, and establishes the blade airfoil after the installation of the vortex generator The simplified model, based on the ANSYS FLUENT numerical simulation method and combined with the classical momentum blade theory, studies th

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for optimizing power generation performance of wind turbine generator under low air density
  • Method for optimizing power generation performance of wind turbine generator under low air density
  • Method for optimizing power generation performance of wind turbine generator under low air density

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0110] In this embodiment, a method for optimizing the power generation performance of wind turbines under low air density, such as figure 1 shown, including the following steps:

[0111] S1: Obtain the axial induction formula;

[0112]S11: According to the blade element momentum theory, the aerodynamic disc momentum theory and the blade element theory are used to divide the wind rotor plane into some ring segments dr in the radial direction through the one-dimensional blade element momentum theory, and it is assumed that each ring interacts with other rings independent. When the momentum theorem is applied to an independent ring, the thrust and torque on the ring can be obtained

[0113]

[0114] Among them, v 0 is the incoming flow velocity in front of the wind rotor, ρ is the air density, a is the axial induction factor, a'=ω / 2Ω is the circumferential induction factor, ω is the circumferential induced angular velocity at the ring, and Ω is the rotational angular veloc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for optimizing power generation performance of a wind turbine generator under low air density. The method comprises: calculating an induced velocity flow field by utilizing a dynamic inflow model, and establishing a dynamic stall model of the blade airfoil; generating a grid of an airfoil flow field computational domain by adopting CFD software; carrying out dynamic stall model simulation analysis on changes of shape parameters and position parameters of the vortex generator by the blade airfoil; and carrying out optimal design on the aerodynamic characteristics of the blade airfoil according to the shape parameters and the position parameters of the vortex generator through an optimal algorithm from the two aspects of the maximum power coefficient and themaximum lift-drag ratio of the designed attack angle alpha, and obtaining the optimal parameters of the vortex generator. The method has the advantages that the vortex generators are reasonably arranged on the wind generating set, so that the problems of blade stall and wind power blade flow separation easily caused by the large-thickness airfoil blade under the conditions of large attack angle,high altitude, low air density and the like are solved.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method for optimizing the power generation performance of a wind turbine under low air density. Background technique [0002] With the gradual increase in the design power of wind turbines, the size of the blades is getting longer and longer. Due to the relatively thin thickness of the blade airfoil of the unit, the blade is prone to fracture when subjected to greater strength and load. In order to meet the high-power conditions, a large-thickness airfoil has been developed to improve the structural strength of the blade, but the large-thickness airfoil has a fatal shortcoming that is poor stall characteristics, especially under the condition of a large angle of attack, it is easy to cause the blade stall. Wind turbine blades are key components for directly capturing wind energy, and their flow conditions determine the efficiency of wind energy utilization. In ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F30/20G06F30/17G06F30/15G06F30/23G06F30/28G06F119/14G06F113/08
CPCG06F30/15G06F30/17G06F30/20G06F30/23G06F30/28G06F2113/08G06F2119/14
Inventor 史晓鸣柳黎明赵国群周晓亮
Owner ZHEJIANG WINDEY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap