Influence of different reynolds numbers and geometries on water jacket cooling performance in a compression ignition engine

Abstract

Abstract In this study, the effect of cooling water Re number and geometry on the cooling performance of the water jacket of the F-Type F8Q 706 engine has been investigated. For this purpose, a 1D model of the engine has been created and verified with the engine performance test results. The effective power for 2500 rpm in the model has been 8.785% higher than the test in the engine catalogue. In another test, the power value has been calculated to be 8.411% higher on average for all engine speeds. Using the in-cylinder pressures and temperatures have been taken from the 1D model, some boundary conditions of the 3D water jacket CFD model have been calculated from the analytical equations. In the calculations have been made in 3D CFD analysis, the stored heat has been decreased by 62.57% from 22128.97 Re to 6175.79 Re. In addition, the average temperature on the cylinder liner surface has been increased by 21.82% at the same Re numbers. At the end of the geometric structure analysis, the finned jacket geometry has been increased the stored heat by 42.01% and the number of PECs by 20.74%. Thus, in the water jacket heat transfer calculations have been made using a validated 1D engine model in addition to analytical and numerical calculations, it has been observed that the change in geometric properties created a good heat storage ability.