Title

Mass Consistent, Analytical Near Wake Models for Wind Turbines

Date

11-8-2021 1:10 PM

Abstract

A new 3-dimensional, analytical wake model is presented which includes improved 9 wake descriptions near the rotor plane when compared to existing models. Wake structures, including the momentum deficit, hub jet, wake rotation, and flow acceleration around the rotor, are economically described with Ricker wavelets and Gaussian functions. These physics are included through the addition of free parameters, balancing 13 the total degrees of freedom with model fidelity. Large-Eddy Simulations (LES) are used as reference data to build the model. Implementation into the FLOw Redirection and Induction in Steady State (FLORIS) framework provides the opportunity for the perform model validation within a wind farm setting. Analytical modeling of each 17 component of flow allows for mass conservation to be evaluated.

Biographies

Zein Sadek, Mechanical Engineering, Minor: Mathematics

Zein Sadek is currently a senior at Portland State University (PSU) majoring in mechanical engineering with a minor in mathematics. Beginning as a transfer student two years ago, he quickly took an interest in applied research, securing a position as an assistant in the Wind Energy and Turbulence (WET) Laboratory. Here, his work focuses on renewable energy, with a special emphasis on wind power and offshore, floating wind plants. Zein is a 2021 McNair Scholar, and has been awarded multiple scholarships at the recommendation of PSU’s Mechanical and Materials Engineering department, including a scholarship from the National Society of Professional Engineers (NSPE). Having completed his first two years of undergraduate education while still in high school, Zein has proven himself to be a highly motivated student. He is currently enrolled in PSU’s Pathways program which allows him to take graduate level courses while completing his bachelor’s degree. After graduating with his master’s degree in 2022, Zein plans to continue his education by obtaining a Ph.D. in his field.

Dr. Raul Cal, Faculty Mentor, Department of Mechanical and Materials Engineering

Raúl Bayoán Cal is a professor in the Department of Mechanical and Materials Engineering at Portland State University; a faculty member since 2010. Received his Ph.D. in Mechanical Engineering from Rensselaer Polytechnic Institute in 2006. During 2006 to 2009, he was a postdoctoral fellow at Johns Hopkins University. His area of research is focused on understanding turbulence with emphasis placed on physics related to wall-bounded, free-shear and multi-phase flows as well as wind/ solar energy.

Disciplines

Mechanical Engineering

Persistent Identifier

https://archives.pdx.edu/ds/psu/36200

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Aug 11th, 1:10 PM

Mass Consistent, Analytical Near Wake Models for Wind Turbines

A new 3-dimensional, analytical wake model is presented which includes improved 9 wake descriptions near the rotor plane when compared to existing models. Wake structures, including the momentum deficit, hub jet, wake rotation, and flow acceleration around the rotor, are economically described with Ricker wavelets and Gaussian functions. These physics are included through the addition of free parameters, balancing 13 the total degrees of freedom with model fidelity. Large-Eddy Simulations (LES) are used as reference data to build the model. Implementation into the FLOw Redirection and Induction in Steady State (FLORIS) framework provides the opportunity for the perform model validation within a wind farm setting. Analytical modeling of each 17 component of flow allows for mass conservation to be evaluated.