Nozzle Definition

A large number of parameters is required to fully define the nozzle including geometries and materials of each component. Each parameter must be specified in the config file although its value may be overwritten if it is specified as a design variable.

Inner Wall Parameterization

The inner wall is parameterized using a 3rd degree B-spline. It is specified by the WALL keyword and a vector of B-spline coefficient coordinates WALL_COEFS, ordered x-coordinate first, then r-coordinate. For example:

WALL= (BSPLINE)
WALL_COEFS= (0.0000, 0.0000, 0.1500, 0.1700, 0.1900, 0.2124, 0.2269, 0.2734, 0.3218, 0.3218, 0.3230, 0.3343, 0.3474, 0.4392, 0.4828, 0.5673, 0.6700, 0.6700, 0.3255, 0.3255, 0.3255, 0.3255, 0.3255, 0.3238, 0.2981, 0.2817, 0.2787, 0.2787, 0.2787, 0.2797, 0.2807, 0.2936, 0.2978, 0.3049, 0.3048, 0.3048)