Method for monitoring aero-engine combustion field by space access type optical frequency comb system

• Main Authors: FU BO, LU ZHERUI, SHANG CE, LI JING, XU LIJUN, ZHANG CHENGHONG
• Format: Patent
• Language: Chinese; English
• Published: 07.01.2020
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention provides a method for monitoring an aero-engine combustion field by a space access type optical frequency comb system. The method is characterized in that an optical frequency comb passes through a beam splitter to obtain two beams of optical frequency combs; one beam is inputted into a spectrum analysis module and the other beam is inputted into a combustion chamber monitoring device after a collimating lens; and an obtained output signal is connected with the spectrum analysis module. The optical frequency comb serving as signal light passes through the combustion chamber to obtain an absorption spectrum signal; the combustion chamber monitoring device is used for acquiring multiple paths of acquisition signals; the spectral analysis module is used for carrying out real-time comparison and analysis on the multiple paths of absorption spectrum signals and spectral signals of the optical frequency comb to obtain change conditions of various parameters of the gas componentconcentration in the aer