| Title |
Experimental Study on the Characteristics of the Heat Transfer and the Pressure Drop inside the Small Diameter Tube with the Heat Transfer Enhancing Geometry |
| Keywords |
Corrugated tube ; 코러게이티드관 ; Indentation depth ; 골 깊이 ; Indentation pitch ; 골 피치 ; Pressure drop ; 차압 |
| Abstract |
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. |