Thermal analysis on piston of marine diesel engine

Interring Gas Dynamic Analysis of Piston in a Diesel Engine considering the Thermal Effect

“…where , ℎ, and ∞ represent the outward normal heat flux, the HTC, and the surrounding temperature at the surface, respectively. The surrounding temperature ∞ can be defined as the combustion gas temperature gas at the combustion-side top surface of the piston head, the cooling water temperature at the side, and the oil temperature oil at the underside and cooling gallery [31]. In order to find an accurate solution to the inverse heat conduction problem, the finite element (FE) method is employed in this study.…”

“…The HTC varies depending on the location of the piston surface. The HTC at the surface of head, excluding the piston head, is determined by Lu et al [31], and the initial value of all design variables, that is, the HTC, is set uniformly as 100 W/m 2 K. An inverse heat conduction problem to determine ℎ can be formulated as an optimization problem as finding [32] ℎ ≡ {ℎ 1 , . .…”

A one-dimensional unsteady wall film evaporation model

“…However, the piston wall temperature is approximately 420 K in direct-injection spark ignition engines [6]. The piston temperature is about 500 K [7], and the cylinder wall temperature is generally within 400-500 K [8] in diesel engines. At such high wall temperature, the vapor pressure, liquid density, and latent heat change significantly, and the wall temperature can be higher than the saturation temperature of the fuel at the local vapor pressure.…”

Static and Thermal Analysis of Piston using FEM Analysis

“…A higher temperature than the rest of the piston is registered in the regions where the combustion propagates and therefore, along top surface, the piston will have different heat transfer coefficients (e.g. [5]). In this study, a solid three-dimensional piston model was analyzed using a finite element analysis module from SolidWorks.…”