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+//Example 12_1

+clc;clear;funcprot(0);

+// Given values

+T_1=255.7;// The ambient air temperature in K

+P_1=54.05;//The atmospheric pressure in kPa

+V_1=250;// m/s

+h=5000;// m

+P_r=8;// Pressure ratio of the compressor

+// Properties

+C_p=1.005;//The constant-pressure specific heat C_p in kJ/kg.k

+k=1.4;// The specific heat ratio

+

+//Calculation

+//(a)

+T_01=T_1+(V_1^2/(2*C_p*1000));//The stagnation temperature at the compressor inlet in K

+P_01=P_1*(T_01/T_1)^(k/(k-1));//kPa

+printf('The stagnation pressure at the compressor inlet,P_01=%0.2f kPa\n',P_01);

+//(b)

+// P_r=(P_02/P_01)

+T_02=T_01*(P_r)^((k-1)/k);//The stagnation temperature of air at the compressor exit in K

+W_in=C_p*(T_02-T_01);//the compressor work per unit mass of air in kJ/kg

+printf('The compressor work per unit mass of air,W_in=%0.1f kJ/kg\n',W_in);