Abstract
Experimental Study of Atomization Feature of Coaxial Parallel Flow Airspray Nozzle
Highlights
Due to the more and more strict requirements of pollutant emission, the combustion chamber of civil aviation engine is developing towards of low condition
In order to reduce the sensitivity of the single-phase liquid jet to the changes of air flow, another air jet can be added to form a air-liquid two-phase flow
The structure of the two-phase flow is to wrap a layer of annular air jet outside the liquid jet
Summary
Due to the more and more strict requirements of pollutant emission, the combustion chamber of civil aviation engine is developing towards of low condition. The most representative of advanced gas turbine chamber are Rich-burn Quench Lean-burn (RQL), Lean fuel premixed pre-evaporation (LPP) and Lean direct injection combustor (LDI). Fuel enters the combustion chamber through plain orifices in the wall to inject the fuel directly into the cross-airflow [6,7]. Because of the swirling flow of the main mode air, it can be considered that the jet is the process of jet breaking and oil-gas mixing in the cross-airflow. In the actual combustion chamber, the fuel mass flow is little and the penetration depth is weak under low working conditions. The atomization performance of the nozzle in cross-airflow under different airliquid mass flow ratio was studied, and the atomization performance of the single-phase direct injection nozzle in the transverse air flow was compared, and the coaxial downstream flow. The atomization performance of the air atomization nozzle provides technical support for optimizing the performance of the combustion chamber in the future
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