Patent ID: 6053048
Filing Date: 2000-04-25
Classification: F01D,F02C,G01L

Abstract:
A pressure-measuring device (10, 20, 22) for measuring pressure fluctuations in a space (15) which is filled with hot gases at a first temperature (T1) and is delimited by at least one wall (12, 14) from an outer space (28) which is at a lower second temperature (T3), in particular for measuring pressure fluctuations in the combustion chamber (15) of a gas turbine (11), in which pressure-measuring device (10, 20, 22) a measuring tube (16, 21, 23) largely free of end reflections with regard to the pressure fluctuations is passed from the space (15) through the at least one wall (12, 14) into the outer space (28), and in which, in the outer space (28) behind the at least one wall (12, 14), a pressure sensor (18) for sensing the pressure fluctuations is connected to the measuring tube (16, 21, 23), wherein provided on the measuring tube (16, 21, 23) are first means which prevent disturbing reflections of the pressure waves, spreading in the measuring tube (16, 21, 23), at jumps in temperature in the measuring tube (16, 21, 23) or render said reflections harmless before entry into the pressure sensor (18).