Investigation presented in this thesis was realized in three main stages. In the first stage; an experimental set-up to generate pulsatile and pure oscillatory pipe flows with laminar, transitional, and turbulent regimes was constructed. The characteristic parameters of the flows; time-averaged Reynolds number, pulsation frequency, and pulsation amplitude could be adjusted as independent from each other in the set-up.

    In the second stage; a data acquisition system composed of all of data acquisition, accumulation, and processing systems was installed to carry a fully computer aided experimental study in the set-up. By using this system, a high speed conduction of time-dependent measurements was achieved with a quite sensitive data accumulation and processing ability. At this stage, computer-aided controls of some components of the set-up such as probe traversing unit, triggering unit, and reference time generating unit were also achieved to be interactive with the acquisition system.

    In the third and final stage; an experimental study was conducted to check reliability of the flow generated on the set-up and to determine the common effects of the characteristic flow parameters; namely, time-averaged Reynolds number(Reta), dimensionless pulsation frequency parameter( ), and velocity amplitude ratio(A1) on the flow structure. Effects of Reta,  , and A1 on axial velocity fields of the flow with laminar, transitional, and turbulent regimes were determined using well-known velocity distribution laws of steady pipe flow and the present state of art on the subject. Effects of Reta,  , and A1 on instantaneous and time-averaged resistance characters of pulsatile pipe flows were also determined using well-known resistance formulas of steady pipe flow and several frictional loss coefficients defined for pulsatile pipe flows in the related literature.

Key Words: Pulsatile Pipe Flow, Oscillatory Pipe Flow, Pulsation Frequency, Pulsation Amplitude, Time-Dependent Flow Measurement, Computer-Aided Flow Measurement.