박찬우 진성민 정종수 2024-01-21T03:06:41Z 2024-01-21T03:06:41Z 2021-09-06 2006-04 1229-6422 https://pubs.kist.re.kr/handle/201004/135610 Friction and heat transfer coefficients were measured inside the corrugated tube using water as the working fluid. The test is performed for 16 tubes which outer diameter of tubes are 12.7mm. These specifications are 4 indentation depths and 4 indentation pitches, respectively. The range of the water velocity inside the tube is from 0.5 to 3.0m/s(8,500<Re< 34,000). If the indentation depth of the corrugated tube is increased, the friction and heat transfer coefficients are augmented. But, when the indentation pitch of the corrugated tube is increased, the Friction and heat transfer coefficients are decreased. Finally, The correlations for the friction and heat transfer coefficients were proposed with the indentation pitch and depth varying Reynolds number. 대한설비공학회 소구경 전열관 내의 열전달촉진 형상변화에 따른열전달 및 압력강하 특성에 관한 실험적 연구 Experimental Study on the Characteristics of the Heat Transfer andthe Pressure Drop inside theSmall Diameter Tube withthe Heat Transfer Enhancing Geometry Article 2 설비공학 논문집, v.18, no.4, pp.297 - 303 설비공학 논문집 18 4 297 303 kci ART001006290 Corrugated tube(코러게이티드관) Indentation depth(골 깊이) Indentation pitch(골 피치) Pressure drop(차압)