한국기계기술학회지 제24권 제5호 (p.823-828)

전동기가 구비된 원형 기둥 외벽의 환기용 천공이 내부 유동 특성에 미치는 영향성

Effect of Ventilation Holes on Internal Flow Characteristics of Cylindrical Column with an Electric Motor
키워드 :
Ventilation hole(환기용 천공),Electric motor(전동기),Provision crane(프로비젼 크레인),Computational fluid dynamics(전산유체역학)

초록

In this study, two ventilation holes were considered to prevent condensation in the circular column supporting the provision crane on a training ship(Saenuri) for Mokpo National Maritime University. The ventilation holes could be understood as the most simple and inexpensive way to prevent condensation because it was formed only by drilling. If sufficient ventilation is provided, the insulation and corrosion of an electric motor can be improved, and a comfortable state can be ensured in the circular column. The circular column had an electric motor for driving the provision crane so that the basic principle was to utilize the kinetic energy for the flow field from a cooling fan in the circular column. The ventilation holes attenuated the low-velocity area in the circular column and contributed to internal flow circulation with updrafts. The results were discussed through numerical analysis based on computational fluid dynamics.