Numerical Simulation and Optimization Strategies of the Wind Environment in the Old Urban Area of Hefei City, China

With the acceleration of urbanization, urban wind environment problems are becoming increasingly prominent, directly affecting air quality and residents’ quality of life. The complex layout of old urban areas restricts wind circulation and is prone to forming unfavorable wind environment zones. This study takes the old urban area within Hefei City Ring Park as the study area by selecting three representative blocks, establishes three-dimensional models, and employs Computational Fluid Dynamics (CFD) numerical simulation to analyze wind velocity distribution in the study area and the key influencing factors. Simulation results show that, influenced by a combination of multiple factors, the wind environment of the old urban area varies significantly. This study then proposes corresponding optimization strategies for the wind environment conditions of each block, such as adjusting the layout and form of target buildings, optimizing the layout of building clusters, increasing green spaces in the city, and improving the design of individual buildings. Comparing existing and optimized simulations validates the effectiveness of these strategies. Finally, the research compares the existing and optimized wind environment conditions, providing empirical support and scientific guidance for optimizing wind environments of old urban areas and promoting high-quality urban renewal practices.