Extraction of Flow Energy by Gliding in a Wind with Uniform Vertical Shear,
Abstract
Gliding in non-uniform wind offers the opportunity of energy extraction by a glider. It has long been suggested that albatrosses in particular use this form of locomotion. The main problem is how to control a glider to maximize the energy gained. For three-dimensional motion, circling in a uniform shear flwo, the solution of the equations of motion by a perturbation method indicates that a synchronization of turning and phugoid frequency is required to stay aloft. For purely two-dimensional motion, it is shown that small periodic variations of the lift coefficient leads to a deterioration of glide performance. An example based on numerical integration suggests that dynamic soaring by albatrosses in the atmospheric boundary layer is not an impossibility. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1973
- Accession Number
- AD0762592
Entities
People
- Ferdinand Hendriks
Organizations
- University of California, Los Angeles