F,5 • NUMERICAL RESULTS 



assuming the Blasius shear distributions and constant Prandtl number 

 are compared with results of Crocco, who used the Blasius shear distribu- 

 tion with constant Prandtl number in his calculations. 



The numerical method of solution utiHzed in [3] was as follows : a mean 

 constant Prandtl number was first estimated, whereupon an enthalpy dis- 

 tribution was computed using Eq. 3-19 with the Blasius shear distribu- 

 tion. A new Prandtl number distribution was then obtained from Fig. F,5a 



0.82 



0.81 



0.80 



0.79 



0.78 



0.68 



0.70 



0.72 



0.74 



Pr 



Fig. F,5e. Reynolds-analogy factor for constant Prandtl 

 number and Blasius shear distribution. 



after converting the enthalpy to temperature by means of NBS-NACA 

 Table 2.10. A new shear distribution was also computed with enthalpy 

 distribution using the Crocco method for solving numerically the momen- 

 tum equation. The new Prandtl number and shear distributions were then 

 substituted in Eq. 3-14 and 3-15 to obtain the final recovery and Reynolds 

 analogy factors. It was not necessary to iterate any further for both shear 

 or enthalpy distribution, because of the rapid convergence of the iteration 

 process. It is seen, however, that it was necessary to make one more 



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