JakeR82
Mechanical
- May 23, 2012
- 21
Hello,
My company recently bought the books for WRC 537, which is identical to WRC 107, and I am familiarizing myself with the calculations.
My question is during the selection of Nx*T/P and Mx/P, ect...which graphs are appropriate to use? The table listed gives graphs for some standard dimensionless values of gamma and rho, but if the calculated values I have deviate slightly which graphs should I be using? Is it necessary to do interpolation between the graphs or to select the 'best' fit graph.
For example, if my value of gamma is 11, and my value of rho is 1.2, I would assume the best fit graph for a nozzle onto a hemi-head to be SP-5. Do i need to do some sort of interpolation between three other graphs? That would assume the values are linear between the different graphs, which I don't know is true or not.
If anybody has gone through the WRC calculations, I would appreciate some guidance on the values I need to select.
My company recently bought the books for WRC 537, which is identical to WRC 107, and I am familiarizing myself with the calculations.
My question is during the selection of Nx*T/P and Mx/P, ect...which graphs are appropriate to use? The table listed gives graphs for some standard dimensionless values of gamma and rho, but if the calculated values I have deviate slightly which graphs should I be using? Is it necessary to do interpolation between the graphs or to select the 'best' fit graph.
For example, if my value of gamma is 11, and my value of rho is 1.2, I would assume the best fit graph for a nozzle onto a hemi-head to be SP-5. Do i need to do some sort of interpolation between three other graphs? That would assume the values are linear between the different graphs, which I don't know is true or not.
If anybody has gone through the WRC calculations, I would appreciate some guidance on the values I need to select.
