Numerical Simulation of Circulation Control Airfoils as Affected by Turbulence Models

Na+-conducting glass and glass-ceramic of the composition comprising aNa2O, bSiO2, cM2O3, dM'O2 and eM''O wherein, based on the combined molar amounts totaling 100%, a is 32-41 mole %, b is 50-58 mole %, the ratio a/b is 0.575/1 to 0.760/1, c is 0-8 mole %, d is 0-7 mole %, e is 0-17 mole %, 2c+d+e is at least 8.7 mole %, M is one or more elements selected from the group consisting of the rare earth elements, yttrium and iron, M' is Zr or Hf and M'' is Mg, Ca, Sr or Ba, Na+-conducting composition having the substantially cubic crystalline structure of the formula Na9-x-n-z/2M1+x/3-2y-n-z/2M'y+nM''y+zSi6O18 wherein M, M' and M'' are as defined above, x is 0 to 1.5, y is 0 to 0.5, z is 0 to 2.0, n is 0 to 0.5, y+nglass-ceramic and crystalline cubic material as a solid electrolyte.