Analysis of Entropy Generation and Potential Inhibition in an Aeroengine System Environment

Table 1

Sources of entropy generation and parameters related to the components of the air system.

Component	Approximate model	Input parameter	Output parameter	Source of entropy generation	Parameters related to entropy generation
Hole, slit, tube, and elbow	Adiabatic and isochoric system	Total pressure	Total pressure	Viscous dissipation
Component undergoing heat exchange	Nonadiabatic and isochoric system	Total pressure; Total temperature; Static temperature; Wall temperature	Total pressure; Total temperature; Static temperature	Heat transfer driven by a temperature difference and viscous dissipation	and
Labyrinth	Adiabatic and nonisochoric system	Total pressure; Total temperature; Static temperature; Rotation speed	Total pressure; Total temperature; Static pressure	Temperature rise due to wind resistance and viscous dissipation	and
Turbine disc cavity	Nonadiabatic and nonisochoric system	Total pressure; Total temperature; Static temperature; Static pressure; Wall temperature rotation speed	Total pressure; Total temperature; Static temperature; Static pressure	Heat transfer driven by a temperature difference and viscous dissipation	and
Tube and cavity of manifold	Adiabatic and isochoric system	Total pressure; Mach number	Total pressure	Flow mixing and viscous dissipation	and