| Based on the engineering background of liquid-propellant rocket engines, the characteristics of electrical ignition with liquid propellant have been researched in this paper. The main points are stated as following:Firstly, an ignition experiment equipment is designed which is used to heat single droplet of liquid-propellant with electricity. The propellant used in these experiments is LP1846. Time series photographs of the process what the droplet undergoes in all kinds of experimental conditions and characteristic parameters have been obtained. Some preliminary analyses about the experiment phenomena and mechanism are proposed. When the largest load voltage is increased, the effect of delayed ignition with droplet has been discussed.Secondly, a discharge experiment equipment of pulsed power source and a spray device with liquid propellant are designed in this paper. Under the conditions of single-pulse discharge, the disquisition of ignition characteristics with LP1846 spray has been investigated. On the basis of experiments, a simple calculation model of intense burning period of delay with LP1846 spray has been developed. The calculated theoretical results are in good agreement with experimental data.Thirdly, a sequence-pulse discharge device is designed. Discharge frequency is 50Hz. With this device, the experimental study of electrical ignition characteristics with LP1846 spray has been investigated. Results indicate that the droplets between two electrodes can combust in instantaneous moment, under the conditions which the discharge power is 50W, these LP1846 droplets are about tens of microns. |
