Comparison of Combustion Dynamic Characteristics of Two Advanced Multi-Cup Fuel Injectors

Acosta, Waldo A ; Chang, Clarence T

关键词: COMBUSTION CHAMBERS;    COMBUSTION STABILITY;    DYNAMIC CHARACTERISTICS;    FLAME TEMPERATURE;    FUEL INJECTION;    GAS TURBINE ENGINES;    PRESSURE MEASUREMENT;    PRESSURE OSCILLATIONS;    SPRAY CHARACTERISTICS;    THERMOACOUSTIC EFFECTS;    VORTEX SHEDDING;   

RP-ID  :  GRC-E-DAA-TN63388

学科分类：航空航天科学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

An experimental investigation of the combustion dynamic characteristics of two advanced multi-cup lean direct injectors (LDI) under simulated gas turbine combustor conditions was conducted. The objective was to gain a better understanding of the physical phenomena inside a pressurized flame tube combustion chamber and study the effects of injector flow number on combustion dynamics. The injectors are known as Three-zone Injectors one and two or 3ZI-1 and 3ZI-2, respectively. The injectors were experimentally evaluated at inlet pressures up to 1.724 MPa, non-vitiated air temperatures up to 828K, and adiabatic flame temperatures up to 1975K. Dynamic pressure measurements were taken upstream of the injectors and in the combustion zone. The combustion dynamic behavior of the two injectors was measured over a range of inlet pressures, inlet temperatures, fuel air ratios, and fuel flow splits.