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Part a (4 marks) Starting from the result given by equipartition of energy, U = Žf NkET, BT, and considering a quasistat
Posted: Thu Apr 28, 2022 8:56 am
by answerhappygod
- Part A 4 Marks Starting From The Result Given By Equipartition Of Energy U Zf Nket Bt And Considering A Quasistat 1 (57.45 KiB) Viewed 30 times
Part a (4 marks) Starting from the result given by equipartition of energy, U = Žf NkET, BT, and considering a quasistatic adiabatic compression for which dW = -PdV, demonstrate that VTf2 = constant and that f +2 VYP= constant, where, y= Show all of your steps, and offer explanation where needed. Part b (3 marks) We can use this result to consider compression within the cylinder of a diesel engine, which we will treat as an adiabatic quasistatic process. First, show that TV-1 = constant. Now use this expression to examine the compression stroke. If the temperature of the air (9=1.4) is 20 °C before compression and the compression ratio is 15:1, what is the temperature of the air after compression? Why don't diesel engines need spark plugs to ignite the fuel?