et A is a liquid fuel that is used for cooling avionics before being injected into the aircraft

combustion chamber. If the amount of energy transfer from the avionics to Jet A is such that

the liquid temperature is $100$C$,$ answer the followings:

a$.$ Assume that Jet A can be mimicked by n$-$dodecane and air can be mimicked by dry nitrogen

at $900$ K$.$ The total pressure in the chamber is $10$ atm. Calculate the lifetime of a $10$ micron$-$

diameter Jet A droplet. Use $900$ K to calculate the mean mixture density as well as to

estimate the diffusivity of n$-$dodecane.

b$.$ Repeat part a$.$ for gas total pressure of $1$ atm.

c$.$ Repeat part a$.$ for gas temperature of $600$ K$.$

d$.$ Repeat part a$.$ for liquid temperature of $150$C due to heat transfer from avionics to the

liquid fuel.

e$.$ Describe the effect of total pressure, gas temperature, and liquid fuel temperature on the

liquid droplet lifetime.