  The study of turbulent boundary layer flow holds significant importance in
urban climate research, particularly concerning numerical simulation studies
where it serves as a crucial inflow boundary condition. However, understanding
the turbulent boundary layer's influence on flow and heat features within
canyon and canopy flow remains incomplete. To address this knowledge gap, our
current work employs simultaneous Particle Image Velocimetry and Laser-Induced
Fluorescence (PIV-LIF) measurements within a large closed-circuit water tunnel.
Through this approach, we obtain valuable flow information under various flow
and thermal conditions, allowing us to explore the impacts of three distinct
turbulent boundary layer flows. The three chosen turbulent boundary layer flows
display distinct influences on flow characteristics and heat removal capacity.
The ventilation rate exhibits a maximum difference of 80% among the tested
boundary layer flows. Additionally, the most significant variation in heat
removal capacity is approximately 45%. Moreover, the different turbulence inlet
profiles result in diverse fluctuating features at the canyon opening, while
the deeper region of the canyon remains less affected.
