A Mathematical Model for the Velocity Profile Internally to a Conical Diffuser

作     者：Disterfano Lima Martins Barbosa Jerson Rogerio Pinheiro Vaz Daborah Aline Tavares Dias do Rio Vaz Sivio Wesley Oliveira Figueiredo Marcelo Oliveira da Silva Andre Luiz Amarante Mesquita Claudio JoseCavalcante Blanco 

作者机构：Faculty of Mechanical Engineering Institute of Technology Federal University of Par6 Bel~m 66075-110 Brazil Natural Resources Engineering Post-Graduation Program Institute of Technology Federal University of Par6 Bel~m 66075-110Brazil Faculty of Sanitary and Environmental Engineering Institute of Technology Federal University of Parci BelOm 66075-110 Brazil 

出 版 物：《Journal of Energy and Power Engineering》 (能源与动力工程（美国大卫英文）)

年 卷 期：2013年第7卷第8期

页      面：1472-1477页

学科分类：01[哲学] 0101[哲学-哲学] 081704[工学-应用化学] 010104[哲学-逻辑学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070104[理学-应用数学] 081701[工学-化学工程] 0701[理学-数学] 

主　　题：DAWTs diffuser renewable energy. 

摘      要：The use of diffusers around the horizontal-axis wind turbines has been widely studied since the diffuser improves the power coefficient of the turbine and it is often called DAWTs （diffuser augmented wind turbines）.Turbines using diffuser are called DWATs （Diffuser Augmented Turbines）,and have efficiency bigger than the Betz limit （maximum energy flow extracted = 59.26%）. Thus, this study presents a mathematical model describing the behavior of the velocity profile internally to a diffuser according to the characteristics of flow and geometry of a conical diffuser. The results are compared with experimental data and show good agreement.