Abstract: By providing simplified computational strategies, this study achieves the concurrent topological optimization of the entire range hood system and its application research, and validates the reliability of the optimized configuration through experimental testing. The optimization results show significant configuration characteristics in the flow channels on both sides of the centrifugal fan inlet; compared to the original flow channel, the low-speed vortex area in the topological configuration channel is further away from the fan inlet, reducing the inlet blockage and enhancing aerodynamic performance. Experimental data indicate that the topologically optimized channel mainly affects aerodynamic performance under high flow conditions, with an increase of 0.65 m³/min at 400 W air volume and an improvement of 0.93% in maximum total pressure efficiency. Noise spectrum analysis shows that the topological configuration channel can reduce the sound pressure in the high-frequency range dominated by aerodynamic noise, resulting in a reduction of 1.14 dB(A) in the overall working noise of the system. In summary, the topological configuration obtained through the adjoint topological optimization method and simplified computational strategies has a certain degree of reliability, providing an effective reference for the performance optimization of the entire range hood system.

Key words: Accompanying topology optimization, Range hood, Design method, Centrifugal fan