I've been watching the tennis Pacific Life Open in Indian Wells, California this week, and once in a while, they'll show cuts of the city and desert. One of these scenes showed what looks like a hundred wind turbines bunched together over a distance of maybe several hundred feet. Their layout was side by side and also behind one another.
This brought me to thinking how can this work? I was under the impression that there has to be some considerable distance between turbines in order for them to function properly, and not spaced one behind the other. It seems like that would cause drag and efficiency problems for the turbines.
Maybe my distance perspective is grossly underestimated, but even if I'm off by a few hundred feet or so, it still seems like a lot of turbines over a relatively small spacing. Is this just plain inefficient and poor spacing? Or are there some exceptions when it comes to wind turbines, such as the manufacturing, or blade velocity, that allows for close bunching?