Flame shape controller for flares takes the form of a cylinder co-axial with and concentrically outside the mouth of the flare, the cylinder being added with diverging cone type inlet structure in the direction of gas flow. The angle of the cone could vary from [0 to 45˚) from the vertical and the length of the cylinder outside the mouth of the flare is sufficient to allow boundary layer to form and converge. The variation of length of convergence of boundary layer is used to control the shape of flame. Various sensors are used to get data on fuel flow rate, surrounding air velocity to calculate length of convergence of boundary layer. Based on this calculation actuators would keep an advance control on flame shape. Calculation of flame shape is done on the basis of an algorithm, for this training data is provided by flame sensors.
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