Читать книгу Wind Energy Handbook - Michael Barton Graham - Страница 49

To study the aerodynamics of wind turbines, some knowledge of fluid dynamics in general is necessary and, in particular, aircraft aerodynamics. Excellent text books on aerodynamics are readily available, a reference list and a further reading list are given at the end of this chapter, and any abbreviated account of the subject that could have been included in these pages would not have done it justice; recourse to text books would have been necessary anyway. Some direction on which aerodynamics topics are necessary for the study of wind turbines would, however, be useful to the reader, and a brief introduction is given in Appendix A3.

For Sections 3.2 and 3.3, a knowledge of Bernoulli's theorem for steady, incompressible flow is required together with the concept of continuity.

For Section 3.4, which may be omitted at first reading, an understanding of vortices and the flow field induced by vortices is desirable. The Biot–Savart law, which will be familiar to those with a knowledge of electric and magnetic fields, is used to determine velocities induced by vortices. The Kutta–Joukowski theorem for determining the force on a bound vortex should also be studied.

For Sections 3.5 to 3.8, a knowledge of the lift and drag of aerofoils is essential, including stalled flow.