7ZHAO Y,CHEN J.Optimum performance analysis of an irreversible Diesel heat engine affected by variable heat ca- pacities of working fluid[J].Energy Convers Mgmt,2007,48:2595-2603.
8GE Y,CHEN L,SUN F, et al.Thermodynamic simulation of performance of an Otto cycle with heat transfer and variable specific heats of working fluid[J].Int J Therm Sci,2005,44(5): 506-511.
9AL-SARKHI A,JABER J O,ABU-QUDAIS M,et al.Effects of friction and temperature-dependent specific-heat of the working fluid on the performance of a diesel-engine[J].Appl Energy,2006,83:153-165.