| Title |
Effects of Roughness Arrangement on Heat Transfer in the Reciprocating Channel |
| Keywords |
Heat transfer ; 열전달 ; Reciprocating system ; 왕복동 장치 ; Rectangular channel ; 사각채널 ; Rib arrangement ; 거칠기 배열 |
| Abstract |
This paper describes a detailed experimental investigation of heat transfer in a reciprocating rectangular channel fitted with rib structures with particular reference to the design of a piston for marine propulsive diesel engine. The parametric test matrix involves Reynolds number, reciprocating frequency, and reciprocating radius, respectively, in the ranges, 1,000～6,000, 1.7～2.5Hz, and 7～15cm with four different rib arrangements. The rib arrangements have considerable influences on the heat transfer in the reciprocating channel due to the modified vortex flow structure. The experimental data confirm that the increases in the heat transfer can be seen in order of Case (b), Case (c), Case (d), and Case (a). |