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| Piston Cooling Jet Two-Phase Flow and Heat Transfer Analysis of a Gasoline Engine |
| DOI：10.13949/j.cnki.nrjgc.2022.02.007 |
| Key Words:gasoline engine piston piston cooling jet internal cooling passage two-phase flow |
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| Abstract:In order to deeply research the development law of the motion of piston cooling jet and the influence of different piston cooling methods on heat transfer， three piston cooling proposals were compared. The jet was verified in a steady flow field to ensure the calculation accuracy in subsequent strong transient flow condition. Then the contours of the piston cooling jet， distribution of the average heat transfer coefficients of the internal cooling passage and piston cooling surface， the temperature distribution of pistons were obtained by numerical simulation in crankcase. The piston temperature of model A which includes forced cooling with the internal cooling passage and piston cooling jet was measured. Measured temperatures and simulated temperatures of several monitor points were compared. The piston temperature fields of all proposals were also studied. Results show that the analysis method can simulate the piston cooling jet accurately and can reflect the flow and heat transfer law in internal coolings passage and the piston bottom. The distribution of temperature fields is reasonable. The simulated temperatures of monitor points are consistent with the test results. The max deviation is only 5.24%. |
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