| The experiment investigation of the gas dynamic resonance heating process is the key point of the design of gas dynamic resonance tube ignitor. In this research work, the experimental studies of the nozzle-cone-cylinder resonance tube system and the annular-nozzle-cone-cylinder resonance tube system are conducted systematically. The results reveal the resonance law and the factors affecting the resonance heating process of these two systems.The coupling flow field of the nozzle-resonance tube is simulated in this paper to disclose the resonance heating mechanisms. The results indicate that the resonance heating process can be partitioned into three phases: the phase of the traveling shock wave in the resonance tube, the phase of the arch-shock wave at the exit of the resonance tube and the phase of the traveling expansion wave in the resonance tube.With the foundation of the experiment and the numerical simulation of the annular-nozzle-cone-cylinder resonance tube system and the nozzle-cone-cylinder resonance tube system, the gaseous oxygen-ethene resonance ignitor and the gaseous oxygen-ethanol resonance ignitor are designed and tested. These two resonance ignitors ignite successfully and are capable of producing steady igniting torch. This means that they can be applied to practical use. Particularly, a new ignition mode of oxygen-ethanol resonance ignition is proposed. The experiment indicates that this mode has advantages of adjustable mixture ratio and short retarded ignition time. |
PDF Full Text Request