Method and device for feeding a turbine engine combustion...

F - Mech Eng,Light,Heat,Weapons – 02 – C

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F02C 7/232 (2006.01) F02C 9/26 (2006.01) F02C 9/38 (2006.01)

Patent

CA 2760378

The invention relates to a controlled high-pressure fuel flow which is fed into a combustion chamber (16) via a valve (20), the position of which is controlled, and a shut-off and pressurisation check valve (40) with variable opening. A value representing the actual mass flow of fuel supplied is calculated by a computation unit (60) from information representing the pressure difference (?P) between the input and output of the check valve (40) and the clearance through the check valve, for example, resulting in the position X of the check valve slide. The valve (20) has a variable position controlled by the computation unit (60) according to the difference between the calculated value representing the actual mass flow and a value representing a desired mass flow.

Un débit contrôlé de carburant haute pression est fourni à une chambre de combustion (16) via une soupape à position commandée (20) et un clapet (40) de coupure en stop et de pressurisation à ouverture variable. Une valeur représentative du débit massique réel de carburant fourni est calculée par une unité de calcul (60) à partir d'informations représentatives de la différence de pression (?P) entre entrée et sortie du clapet (40) et de la section de passage à travers le clapet par exemple traduite par la position X du tiroir du clapet. La soupape (20) a une position variable commandée par l'unité de calcul (60) en fonction de l'écart entre la valeur calculée représentative du débit massique réel et une valeur représentative d'un débit massique désiré.

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