Separation control by tangential blowing inside the bubble

Experiments have been carried out investigating the effectiveness of steady tangential blowing (inside the separation bubble) to control an axisymmetr ic separated flow at low speeds. Turbulent boundary separation was induced on a contoured afterbody and the separated shear layer reattached on a narr ow cylindrical sting. Measurements made consisted of model surface pressure s, mean velocity, turbulent shear stress and kinetic energy profiles using a 2-component LDV system. The results explicitly demonstrate that blowing d ownstream of the separation location, but within the bubble, can be an effe ctive means of separation control, considering both wall and wake flow reve rsals.