Abstract: Impinging jets are widely recognized for their efficiency in mass, momentum, and energy transfer, making them essential in various engineering domains, including hydraulic engineering, thermal systems, and industrial cleaning technologies. In many practical applications, jet flows are constrained by spatial limitations, leading to the formation of semi-confined impinging jets. These jets feature a semi-confined plate positioned parallel to the impingement surface at the nozzle exit, generating a more complex flow structure and significantly modifying turbulence behavior. This study experimentally examines the turbulence characteristics of a semi-confined impinging jet produced by a circular pipe using two-dimensional particle image velocimetry (2D-PIV). Experiments are conducted for four impingement distances (H = 3d, 4d, 5d, and 6d), where H denotes the distance between the nozzle exit and the impingement plate, and d is the nozzle diameter. The inlet Reynolds number, based on nozzle diameter and bulk jet velocity, is maintained at a constant value of 11,052. Instantaneous velocity fields are captured along the jet center plane to investigate the streamwise development of turbulent kinetic energy, probability density functions (PDFs) of fluctuating velocity, skewness and flatness factors, and two-point correlation functions. The results reveal that, with increasing impingement distance, both the peak turbulent kinetic energy and the spatial extent of the high-turbulent-kinetic-energy region in the free jet shear layer grow markedly. In contrast, the peak turbulent kinetic energy in the wall jet region initially rises and then diminishes as the impingement distance increases further. Notably, when H ≤ 4d, the peak turbulent kinetic energy in the wall jet region exceeds that in the free jet region, whereas for H ≥ 5d, the free jet region displays higher peak values. The local peak turbulent kinetic energy in the wall jet region exhibits exponential decay in the radial direction, with its half-width increasing linearly. Importantly, both the growth rate and decay exponent remain largely unaffected by changes in impingement distance. Analysis of velocity fluctuation statistics shows that the axial fluctuating velocity distribution along the jet centerline transitions from leptokurtic to platykurtic. Conversely, the radial fluctuating velocity distribution in the wall jet region shifts from platykurtic to leptokurtic. Further examination of skewness and flatness factors reveals that the axial fluctuating velocity along the centerline is left-skewed and leptokurtic, while the radial fluctuating velocity in the wall jet region is right-skewed and likewise leptokurtic. These observations underscore the non-Gaussian and intermittent nature of turbulence during jet development. Two-point correlation analysis demonstrates that increasing the impingement distance broadens the spatial extent of velocity correlations in both the free jet and impingement regions. Furthermore, the integral length scale gradually increases along the jet's development, indicating the continuous growth and amalgamation of turbulent structures downstream. This study enhances the understanding of turbulence in semi-confined impinging jets. By providing comprehensive experimental data on the mechanisms of mass, momentum, and energy transfer, it offers valuable insights for optimizing structural design and improving performance in engineering applications. These insights are particularly applicable to technologies involving heat transfer, fluid flow, and industrial cleaning, where efficient jet configurations are critical.