Boundary Imaginary boundary System boundary may be real or it could be imaginary The system may be stationary or moving rigid stationary boundary chimney Gas air imaginary boundary exhausted rigid moving boundary gas imaginary boundary diffuser compressor burner gas turbine nozzle 上游充通大学 March 3,2018 4 SHANGHAI JLAO TONG UNIVERSITYMarch 3, 2018 4 Boundary System boundary may be real or it could be imaginary The system may be stationary or moving Imaginary boundary chimney