Failure Analysis of the Pin Bore of the Combined Piston for the Aero Engine

Table 3

The third kind of thermal boundary condition of the piston of an aircraft engine.

Position	Ambient temperature (K)	Convective heat transfer coefficient (W/(m^2·K))	Position	Ambient temperature (K)	Convective heat transfer coefficient (W/(m^2·K))
Piston crown	700	503	Upper part of piston cavity	360	310
Piston bank	450	98	Lower part of piston cavity	360	290
Piston skirt	160	300	Oil passage	230	480
Pin bore	210	270	Upper first ring groove	430	700
Other ring grooves	200	250	Lower first ring groove	400	650