Experimental study on airflow containment and pollutant capture of a push-pull ventilation system in residential kitchens

Дата публикации: 18-08-2026 00:00:00

Cooking is a major source of indoor air pollution, making high-efficiency ventilation systems essential for containing cooking pollutants. This study proposes a novel push-pull ventilation system with an inclined capture jet at the side edge of the stove. Particle image velocimetry and the scattering grayscale method were used to measure airflow characteristics and particle concentration distributions in the cooking zone under different exhaust flowrates, capture jet velocities, and simulated cooking operation disturbances. The results show that the capture jet gradually dominates the cooking zone airflow with increasing velocity, and its centerline aligns with the exhaust outlet, forming a stable containment zone. The deflection angle of the capture jet under heating conditions is larger than that under isothermal conditions. The deflection angle increases with the exhaust flowrate and decreases with the jet velocity. Empirical linear models for jet centerline trajectory and...

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