They then studied the wake left by the bats' fluttering wings.
Among other things, when the engineers studied the wake of the prototype they found that it closely resembled the wakes of the robotuna and of living tropical fish (Danios).
Large Eddy Simulations (LES) are performed in order to study the wake and power characteristics of a horizontal-axis wind turbine in a wind tunnel.
A series of tests has been performed on a flapping airfoil in a subsonic wind tunnel to study the wake structure for different sets of mean angle of attack, plunging amplitude and reduced frequency.
"Once we determine the most efficient flapping motion on the Charles," said Mr. Czarnowski, "we want to bring the boat back to the MIT Testing Tank to study the wake so we know what an efficient wake looks like". Future work includes designing a flipper system that allows for maneuvering as well as propulsion.
"It's never going to be the same as it is in free air, but we're just trying to get as close as we can to that". The initial task was to study the wake - the airflow behind the car - and see if it could be made more benign to a car behind.
"When I get old, I wish to possess something like that," said the boy, studying the boat's wake.
Then, the obtained phase angle is used to construct a calibration model which can be used not only to correct the sensor outputs but also to study the transducer wake behavior and effect on the measurements.
For example, after studying the words bed, rest, wake, tired, awake, dream, doze, blanket, snooze, drowsy, snore, and nap, a large number of subjects will claim to recall seeing the word sleep, even though it was not on the list.
We are studying the brain circuitry that wakes up the brain, and re-establishes the airway, and how we can promote airway re-opening and prevent the waking from occurring.
