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Stagnation Point Heating - enthalpy at the wall

  1. Nov 25, 2011 #1
    Using the Fay-Riddell correlation, I can solve for the stagnation point heat transfer but I'm running into a snag. I'm doing this for a thermo-chemical equilibrium assumption. I'm confused with the enthalpy at the wall. I'm assuming a wall that is not adiabatic, but at some wall temp Tw. If I know what the pressure and density of the flow at the wall, could I use the eqair applet http://www.dept.aoe.vt.edu/~devenpor/tgas/ and solve for the enthalpy using the pressure and density as the inputs? I've posted an example from class.

    I thought that I could use this but when I tried it and it didn't work out as I had planned. Following the example that my professor posted, he assumed that the enthalpy at the boundary layer edge (he) is the same as the enthalpy right after the shock wave (h2). The enthalpy after the shock wave was found using the eqair applet.

    I'm I correct in using the eqair applet again for the wall?

    I tried working the example problem but I am not getting the results that my professor is getting. I tried using the eqair applet for using the wall conditions. and I get h wall = 1.6227E6. I solved his example in reverse to solve for the h wall that he is using and I get h wall = 2.469999778E7. He doesn't show what value he is using for the wall enthalpy.
     

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    Last edited: Nov 25, 2011
  2. jcsd
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