TY - JOUR A1 - Molnarne, Maria A1 - Kollar-Hunek, Klara T1 - Spline Functions in Evaluation of Explosion Limit Curves for Gas Mixtures JF - Hungarian journal of industrial chemistry N2 - The paper discusses a new method to approximate the sometimes missing apex point of the explosion limit curves of flammable substances with diluents in air. The base of the new method is to vary the frame points of the co-monotonic splines using de Casteljau algorithm. We show several examples for flammable/inert/oxidising gas containing systems – selected by the program TRIANGLE – where the method was applied. Due to the definition of the frame of splines it can be stated that the new method never restricts the explosion range around the apex and shifts the explosion limit curve into the direction of higher inert gas concentrations. This means that the new method can correct the highly “cut down nose” of the co-monotonic splines and gives a safer explosion range of these systems. KW - Ternary flammable systems KW - Inerting KW - Explosion areas KW - Co-monotonic spline curves KW - CHEMSAFE KW - TRIANGLE Programm KW - Explosion KW - Dreistoffsysteme KW - Spline interpolation PY - 2005 SN - 0133-0276 VL - 33 IS - 1-2 SP - 75 EP - 80 PB - Hungarian Oil and Gas Research Institute CY - Veszprém AN - OPUS4-13514 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Molnarne, Maria A1 - Viczián, G. A1 - Heszberger, J. A1 - Kollár-Hunek, K. T1 - Explosion areas of flammable substances and their numerical approximation JF - Hungarian journal of industrial chemistry KW - Ternary flammable systems KW - Inerting KW - Explosion areas KW - Spline curves and surfaces KW - 2D and 3D visualisation PY - 2001 SN - 0133-0276 VL - 29 IS - 2 SP - 143 EP - 147 PB - Hungarian Oil and Gas Research Institute CY - Veszprém AN - OPUS4-1225 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -