The stability characteristics of a premixed, swirl-stabilized flame were studied to determine the. effects of hydrogen addition on flame stability under fuel-lean conditions. The burner. configuration consisted of a centerbody with an annular, premixed methane/air jet.
eigenvalue - (mathematics) any number such that a given square matrix minus that number times the identity matrix has a zero determinant. characteristic root of a square matrix, eigenvalue of a matrix, eigenvalue of a square matrix. value - a numerical quantity measured or assigned or computed; the value assigned was 16 milliseconds.
In this picture, an electromagnetic eigenmode of the periodic structure (called Bloch wave) is represented as a superposition of two counter-propagating waves that would exist in the absence of grating. Since neither of the components can propagate unaltered through the grating, they appear to interact between themselves.