Experimental investigation on multi-pipe synchronous ignition technique using two-phase detonation wave

To investigate the detonation wave ignition technique based on the liquid fuel, a series of detonation wave ignition experiments utilizing liquid kerosene as fuel and oxygen as oxidizer were conducted. The supply pressure of oxygen and kerosene were around 1.0MPa and 0.7MPa, respectively. The ignition energy of spark plug was only round 50mJ. The primary characteristic of two-phase detonation wave ignition technique was investigated. The experiment demonstrated that a fully developed detonation wave could be rapidly produced with low ignition energy. The detonation pressure of kerosene/oxygen reaches 4.0MPa and the velocity of detonation wave is in the range of 1500m/s to 2001m/s as well as the temperature in the exhaust flow is approximately 2075K. Experiments of two-phase detonation propagation from a single pipe to multi-pipe were carried out to verify the feasibility of multi-pipe ignition technique using two-phase detonation wave. Up to now, synchronous ignition in four pipes using detonation wave ignition technique has been successfully achieved. The results suggested that the reduplication of two-phase detonation wave ignition technique is reliable. The synchronization in multi-pipe ignition is excellent, and the time deviation is in the order of 10^-5s. The kerosene/oxygen detonation wave ignition technique is suitable to synchronous ignition for rocket engines with multi-combustor.