Numerical Simulation And Design Of Flap And Plate-Fin Heat Exchanger For Wind Turbine

The exhaustion of traditional Resources induced the rapid development of Renewable energytechnologies. The wind power technology, due to some huge benefits, such as short constructioncycle, flexibility, law consumption, non-pollution and Recyclability, has Received attentions inacademic and industrial fields. The improvement of conversion efficiency of wind turbine and thesolution of thermal dissipation aRe two crucial topics of wind power technology. The conversionefficiency of wind turbine is determined by blades, and the aero-dynamic performance of the airfoilprofile diRectly influences the conversion efficiency. The thermal dissipation of wind turbine can beRealized through liquid cooling way, and the optimization design on the weight and efficiency of heatexchanger is of gReat significance.The aerodynamic performance of airfoil profile and then the conversion efficiency of windturbine can be dramatically improved through the installation of Gurney flap. This part focuses on theoptimization design of Gurney flap, including Research of optimization technique on the basis ofmulti-island genetic algorithm, verification of the proposed technique through iSIGHT multidisciplinary optimization framework softwaRe and numerical simulation and verification of flowsaround airfoil. The best airfoil to install Gurney flap was selected by comparing the airfoilaerodynamic performance of the thRee basic airfoils. Based on the iSIGHT optimization platform,Realize the coupling analysis of the momentum equation of flow field and optimization algorithm,and obtain the optimal airfoil profile. Numerical Results show that the optimal airfoil profile giveshigher lift-to-drag ratio.The liquid cooling way to dissipate thermal energy of wind turbine is pReliminarily investigated,and the attention is focus on optimization design of a crucial accessory, i.e., plate-fin heat exchanger.The height of wing, distance of adjacent wings and width of the coRe aRe selected as the designableparameters. The optimal objective is selected as minimizing the system mass under the constraintradition that efficiency doesn’t decRease, and the plate-fin heat exchanger is optimized based on theiSIGHT optimization platform. CompaRed to the primary structuRe, the weight of optimalstructuRe is Reduced by24.1%and the efficiency of that is improved by7%. Also, numericalsimulations on the flow fields and heat transfer fields of primary structuRe and optimal structuReshow the optimal structuRe has higher performance, lower pRessuRe drop, and these conclusionsfurther illustrate the optimal structuRe of heat exchanger.