Effect of Alloying Elements and Ceramic Coating on the Surface Temperature of an Aluminum Piston in a Diesel Engine

Table 2

Thermal boundary condition parameters for pistons with various alloying elements [10].

Position		Temperature (°C)	Film coefficient (W/m^2°C)
Piston crown	Outer	1140	489
	Central	1140	578
	Interior loop	1150	675
	Upper peripheral surface	1150	751
	Lower peripheral surface	1150	765
	Bottom	1150	486
Combustion chamber	Below the center	1150	395
	Above the center	1150	239
	Central top	1150	202
	Center	1150	328
Firepower shore		200	163
First ring groove	Upper surface	180	2260
	Bottom	180	2120
	Below surface	180	2223
First ring shore		180	470
Second ring groove	Upper surface	170	2080
	Bottom	170	1911
	Below surface	170	1972
Second ring shore		170	432
Third ring groove	Upper surface	150	1961
	Bottom	150	1909
	Below surface	150	2036
Third ring shore		150	325
Piston skirt		150	487
Oil return hole		150	778
Pin hole		140	324
Inner cavity	Upper surface	130	613
	Upper peripheral surface	100	435
	Middle peripheral surface	130	396
	Lower peripheral surface	130	335