公开(公告)号：EP2372246A2

公开(公告)日：2011-10-05

申请号：EP11250302.4

申请日：2011-03-14

Applicant: ROSEMOUNT AEROSPACE INC.

Inventor： Meneely, Clinton T. ,  Myhre, Douglas C. ,  Michel, Joseph R. ,  Aadland, Tim

IPC: F23N5/16

CPC classification number: F23N5/16 ,  F23N2041/20 ,  F23R2900/00013 ,  Y02T50/677

Abstract: Disclosed is a fuel injector (110) for a gas turbine engine combustor that includes a fuel nozzle (126) for injecting fuel into the gas turbine engine combustor and a fiber optic microphone (140) operatively associated with the fuel nozzle for measuring acoustic pressure differentials within a combustion chamber (14) of the gas turbine engine combustor. The fiber optic microphone includes a fiber bundle having at least one light transmitting fiber and one light receiving fiber; and a dynamic pressure-sensing diaphragm operatively spaced apart from a sensing end of the fiber bundle. The diaphragm has a reflective surface and is formed from a material capable of withstanding temperatures associated with flame exposure. The diaphragm is adapted and configured for deflecting in response to acoustic pressure changes within the combustion chamber. The fuel injector can further include a mechanism for measuring the temperature of the diaphragm, so as to account for changes in the material properties of the diaphragm caused by temperature changes in the combustion chamber.

Abstract translation: 公开了一种用于燃气涡轮发动机燃烧器的燃料喷射器（110），其包括用于将燃料喷射到燃气涡轮发动机燃烧器中的燃料喷嘴（126）和与燃料喷嘴可操作地相关联以测量声压差的光纤麦克风（140） 在燃气涡轮发动机燃烧器的燃烧室（14）内。 光纤麦克风包括具有至少一个光传输光纤和一个光接收光纤的光纤束; 以及与纤维束的感测端部可操作地间隔开的动态压力感测隔膜。 隔膜具有反射表面，并且由能够承受与火焰暴露相关的温度的材料形成。 隔膜适于和构造成响应于燃烧室内的声压变化而偏转。 燃料喷射器还可以包括用于测量隔膜的温度的机构，以便考虑由燃烧室中的温度变化引起的隔膜的材料特性的变化。