Experiment on performance of annular interstage turbine burner

According to the interstage turbine burner(ITB)operation condition,an ITB annular combustor test rig, which used trap vertex combustor design, was designed and manufactured based on ITB being used in a certain turbo-shaft engine, and combustor performance experiment study was performed. The results show that: the lower flammable limit of the ITB is 10.2, and it is favorable to ignite when the pressure difference between the inner of the cavity and the outer of the cavity is reduced. As compared with the ordinary combustor, the combustion efficiency of the ITB is lower, and the combustion efficiency improves when the inlet temperature increases. The total pressure recovery coefficient of the ITB is lower, and the variation of inlet temperature has a less effect on the pressure recovery coefficient. The outlet temperature distribution factor(OTDF) is good, and the outlet temperature distribution factor decreases when the inlet temperature increases. When the inlet temperature increases, the wall temperature of the liner would be partially higher, and the cooling design of the liner should be optimized.