불연속적인 소용돌이 유도 배플판을 사용하여 열전달 속도를 향상시키기 위해 관형 열교환기에 대한 실험적 분석을 수행했습니다. 이 설계에는 다양한 각도로 배치된 직사각형 공기 편향 장치가 있는 천공 배플 플레이트가 포함되었습니다. 실험 전반에 걸쳐 튜브의 배열은 일관되게 유지되고 공기 흐름 방향과 정렬되었습니다. 튜브는 표면의 균일한 열유속에 노출되었습니다. 각 배플 플레이트에는 모두 16개의 디플렉터가 있습니다.

An experimental analysis was conducted on a tubular heat exchanger to enhance the heat transfer rate using a discontinuous swirling-inducing baffle plate. This design included perforated baffle plates with rectangular air deflectors positioned at various angles. Throughout the experiment, the arrangement of the tubes remained consistent and aligned with the direction of the airflow. The tubes were exposed to a uniform heat flux on their surfaces. Each baffle plate had sixteen deflectors, all inclined at the same angle and arranged in a clockwise pattern. This configuration created a swirling motion of the air inside a circular duct containing the heated tubes, leading to increased turbulence and improved heat transfer on the surface. The spacing between the baffle plates was adjusted at different pitch ratios. The Reynolds number was carefully controlled and kept between 16,000 and 29,000. The effects of pitch ratios and inclination angles on the performance of the heat exchanger were analyzed, and the results showed that using a baffle plate with rectangular deflectors inclined at 30° and a pitch ratio of 1.2 led to an average increase of 1.29 in the thermal enhancement factor.

Flow resistance Inclination angle Circular baffle plate Rectangular deflector Swirl flow Thermo-fluid performance