Spatially and temporally resolved velocity measurements in wall-bounded turbulent flows remain a challenge. Contrary to classical laser Doppler velocimetry (LDV) measurements, the laser Doppler velocity profile sensor (LDV-PS) allows the combined measurement of tracer particle position and velocity, which makes it a promising tool. To assess its feasibility a commercial LDV-PS is employed in a turbulent channel flow at \(Re_\tau =350\). Additionally, the measurement and signal-processing accuracies of velocity and location are evaluated for various tracer-object sizes and velocities. On this basis, the turbulent channel flow measurements are evaluated and compared to reference data from direct numerical simulations. Thus, potentials of the LDV-PS are investigated for different regions of the flow and various data processing routines as well as the experimental practice are discussed from an application perspective.

壁面湍流中的空间和时间分辨速度测量仍然是一个挑战。与经典的激光多普勒测速 (LDV) 测量相反，激光多普勒速度剖面传感器 (LDV-PS) 可以组合测量示踪粒子的位置和速度，这使其成为一种很有前途的工具。为了评估其可行性，在\(Re_\tau =350\) 的湍流通道流中采用了商用 LDV-PS。此外，还针对各种示踪物体尺寸和速度评估速度和位置的测量和信号处理精度。在此基础上，对湍流通道流量测量进行评估，并将其与直接数值模拟的参考数据进行比较。因此，研究了 LDV-PS 在不同流动区域的潜力，并从应用角度讨论了各种数据处理例程以及实验实践。