Fluid - Solid Coupling Dynamic Analysis Of 100kW Horizontal Shaft Fan

This article identifies the main contents, research methods and means through extensive searching and reading literature and materials about new wind turbines and wind turbine tower, fan base, learning to understand wind turbine research and latest research results. Wind turbine types and structures are introduced, the wind turbine blade airfoil aerodynamic characteristics and some of the basic concepts are introduced. The three classic design theory aerodynamic design of wind turbine blades are descripted detailedly which are simplified design model based on Bates theory, Schmitz design model and Glauert design model. Summed up the fan blade design process, determined the horizontal axis wind turbines design ideas of this study. Taking a land-based wind resource characteristics of Yunnan, 100kW horizontal axis wind turbine as a research object, using fan blades aerodynamic design theory to determine the basic parameters of Yunnan somewhere 100kW horizontal axis wind turbines, and to design and calculation. Then,the three-dimensional modeling of 100kW horizontal axis wind turbine blades are done by three-dimensional modeling design software Pro/E. The three-dimensional model of 100kW horizontal axis wind turbine conical tower, expanding pile and foundation are founded by Pro/E. Finally, put blade, tower, expanding pile and foundation combine with peripheral fluid domain by Pro/E to Form an organic whole.This paper describes basic Theorythe of fluid-structure coupling analysis and dynamic analysis to further deepen understanding about the convective structure interaction problems and structural dynamic analysis of the problem.The fluid-solid coupling equation are summarized and established through the fluid and solid theoretical foundation;the type of calculation of fluid turbulence equations and numerical simulation methods and selection and classification are described. Then put 100kW horizontal axis wind turbine machine model and fluid domain model import into Ansysworkbench CFX software to simulate and calculate around the whole fan flow field. Eight Winds is selected as the operating conditions of a horizontal axis wind turbine, After a turbulent wind effects are calculated on a horizontal axis wind turbine machine pressure distribution, and by using a least squares fit of relationship of the maximum pressure value with wind speed and the minimum value of wind pressure with wind speed. The pressure values in the boundary surface Fan with indirect coupling is calculated by CFX, the stress distribution of the whole fan is analyzed, Eight fans maximum deformation conditions and the maximum stress value can be got, the relationship between the maximum value and the wind speed and the maximum deformation stress value and wind speed have been fit by least squares. And prestressed modal analysis of the whole fans with coupling is carried out, through comparing with the fan base and the foundation and without the fan base and the foundation in modal analysising impacts on the natural frequency of the overall structure of fan. Finally, fluid-solid coupling dynamic analysis of the horizontal axis wind turbine with 100KW whole structure was carried out by CFX in fluid and transient dynamic module in solid structure. The maximum deformation of the overall fan, the maximum equivalent stress and the acceleration curve with change over time and the maximum deformation, the maximum equivalent stress and the acceleration curve of maximum stress point of fan in the downwind direction, horizontal and vertical wind wind deformation were gained through fluid-solid coupling dynamic analysis.