Investigation On The Ignition Process Of The Liquid-Fuelled Rotating Detonation Engine

Rotating Detonation Engine(RDE)has more advantages about high efficency of the heat cycle,stable thrust,simple structure and few pollution of combustion product.Based on this,More and more research centers and corparations focus on the RDE propelling device in the world.But it is more diffcult to combine the gas phase RDE into the actual engineering project.Because it is very dangerous and hard to use gas phase fuel in the spacecraft device.Meanwhile,the stricter volume bulk conditions are given when using the gas phase fuel in the spacecraft device.So,it is emergent to start the research about the two phase RDE.as to this.This paper will start those works under below:(1)Based on two phase rotating detonation engine test bench,Using vertical arrangement of pre-detonation tube successfully detonates the two phase RDE,The stability and self-sustaining of the rotating detonation wave was obtained.The the stability of two phase rotating detonation engine working process are analyzed in experiment.The conclusions are these:When the pressure of oil chamber and gas chamber in a stable state,The stability of the two phase RDE is better.The higher the pressure and speed of detonation wave is;Oxidizer mass flow ratio has a great influence on the formation and establishment of the detonation wave,The under certain conditions.When Oxidizer mass flow rate is higher,the higher the peak pressure and frequency the of detonation wave;Detonation wave in unstable propagation phenomena appeared in the process of transmission,Mainly because of using liquid fuel,This kind of unstable phenomenon mainly is the effect of the spray nozzle,Engine jet structure and temperature and pressure.after detonation wave.(2)The initiation performance and the influence factors of the detonation wave set about two phase RDE are explored,Experiment found that the vertical arrangement of pre-detonation tube can get self-sustaining spread detonation wave,But under the same conditions,arosswise arrangement of pre-detonation tube can not did it;Trying to use the small energy such as spark plug to dignite RDE in the experiments,But failedl;The influence of equivalent ratio in the process of detonation wave establishing was studied,In a certain range,The higer the equivalent ratio is,The better of detonation wave is,But when equivalent ratio reaches some valus,a certain unstable detonation phenomenon was observed.Detonation wave speed decreases;Research shows that the ignition timing is has great effect on the formation of the detonation wave.The later ignition moment,The greater the stability of the detonation wave,The greater the stability and the pressure of detonation wave.(3)In this paper,the of initiation performance pre-detonation tube was studies,meanwhile,experiment.about sigle detonation tube was operated.Experiment shows that_the higher detonation tube blocking ratio is,The higher pressure the detonation wave has,the higher the detonation wave velocity it has in the single tube experiment,in a certain range,in bigger diameter of the detonation tube is,the higer pressure and velocity detonation wave it has;when the propellant equivalent ratio is better in the process of the detonation tube,the result of detonation is better;Meanwhile,when surface enhancement device was uesed in the experiment the result is better,because this type can strengthenand foucs the shock wave.(4)The numerical simulation method on the lateral jet initiating detonation wave in two-dimensional numerical simulation research,the results showed that when using lateral jet initiation,The Angle of the jet tube has a great influence on the detonation wave propagation,detonation wave has the erosion of expansion wave in the partial pressure and temperature on the corner wall,at the same time in the process of the detonation wave propagation under the influence of tilt caused by velocity change in different directions;the study found that the position of the jet pipe in the spread of the detonation wave may also be affected.This papaer,the jet detonation pipe is applied to ignite different radius combustion chamber under 2D numerical simulation,this paper initiating detonation wave diffraction of detonation wave and the formation process was explained under different curvature radius combustion chamber.