טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentDoron Gilad
SubjectA Reciprocating Wind Energy Generator Driven by Flow Control
DepartmentDepartment of Mechanical Engineering
Supervisor Professor David Greenblatt
Full Thesis textFull thesis text - English Version


Abstract

This research describes progress in the development of a new concept in wind energy generation.

Unlike conventional wind turbines, the present system utilizes active boundary layer control over a finite-span cylinder to generate oscillatory loads that drive a large pendulum in reciprocating motion. In principle, this allows for the drive-train and generator to be located close to the ground in order to facilitate inexpensive installation and maintenance. Experiments were performed on a finite-span cylinder under super-critical conditions where boundary layer control was achieved by enforcing separation using small spoiler-flaps. Integral lateral and drag forces as

well as circumferential surface pressure distributions were measured. A one-degree-of-freedom numerical model of the system was developed. It was initially validated and then used to make predictions of a full-scale system for wind speeds in the range 3m/s to 8m/s. The maximum predicted power coefficient for the system was 7%. This can be significantly increased by using more aggressive boundary layer control, such as slot blowing, and by adding an additional degree of freedom to the system.