Answer to Question #249463 in Mechanical Engineering for russman

Question

An engine has a swept volume of 15 litres and a volume ratio of compression of 14:1. The air in the engine at the beginning of compression has a temperature and pressure of 30⁰C and 95 kN/m², respectively. The air is compressed according to the law PV^1.34=C At the end of the compression the air is heated at constant volume through a pressure ratio of 1.6:1. Determine

a)the temperature and pressure of the air at the end of the compression

b)the temperature and pressure of the air at the end of the constant volume process

c)the heat transfer required to carry out the constant volume process

For the air, take c_p = 1.005 KJ/kg K, R = 0.24 KJ/kg K

Answer 1

i. Monitoring physical flow phenomenon such as laminar, tuberlent and separation flows, vortex and shock wave.

ii. Measuring aerodynamic quantities such as pressure, skin friction, lift, drag and moments.

(A)

so the temperature and pressure of the air at the end of the constant volume process will be 30 degree Celsius and pressure will be 46kN/m

(B)

temperature and pressure of the air at the end of the constant volume process will be as same as at the end of constant volume process.

(C)

heat transfer required to carry out the constant volume process will be negligible due to the exothermic reaction will be take place at that specific temperature