Experimental Investigation of Zero Pressure-Gradient Turbulent Boundary Layers Using Particle Image Velocimetry

Due to the practical importance of turbulent boundary layers in fluid dynamic engineering, there is a need to predict or compute their behaviour. Numerous experimental and numerical studies have been conducted to examine the characteristics of turbulent boundary layers. Low-speed PIV was employed to measure the stream-wise velocities of zero pressure-gradient boundary layers in the turbulence water tunnel research facility at Cambridge University Engineering Department. The measurement position was 4 m downstream of a tripping rod with freestream velocities of 0.53 m/s and 0.64 m/s respectively. The use of low-speed PIV in this experiment enabled measurements of the mean flow fields and the flow statistics. Data is also reported for normalized mean velocity based on friction velocity (u$_{\tau })$ calculated using Clauser chart method.