Abstract：In order to investigate the influence of jet airflow deflection on the cleaning performance of filter cartridge, with the injection hole and the injection nozzle of the blowing tube as the research objects, the pulse-jet experimental platform and the schlieren method were used. The impact zone of high speed airflow was recorded by the schlieren device. The effects of the injection hole of different types and injection hole at different diameters on the airflow deflection were compared. Meanwhile, the peak pulse pressure on the side wall of the cartridge was used as the evaluation index to test the influence of airflow deflection on it. The results show that the jet flow deflection is positively related to the jet pressure and the hole diameter. When the jet pressure is increased from 0.3 to 0.5 MPa, the maximum velocity in the air core area increases from 249 to 381 m/s, and the horizontal velocity increases from 66 to 79 m/s, thus the area affected by airflow deflection increases. The injection nozzle can avoid the deflection phenomenon of the pulsed blowing air flow, and it can increase the pressure peak in the upper middle area of the cartridge side wall, and at the same time, it improves the uniformity of the peak pulse pressure distribution on the side wall of the cartridge.

Keywords：jet airflow; airflow deflection; pulse-jet cleaning