Cellulose Based Gel Propellant Properties Test And The Numerical Simulationmethod Study

Several kinds of gel propellant was prepared by using amphipathic cellulose based gel(CMCN), through specific process and certain proportion of raw materials. Those kinds ofgel propellant’s burning rate can be controlled. in this paper, the numerical simulationtechnology has been used to calculate the atomization morphology by double impinging jet.Then the generation mechanism of gel propellant atomization morphology by doubleimpinging jet have been studied through comparing and analysis the results of numericalsimulation and real experiment. The main contents are as follows:1. Cellulose based high burning rate gelled propellant with certain mechanicalproperties have been prepared by mixing liquid propellant and amphipathic cellulose mixedester ether CMCN according to certain proportion and different species of different contentsof additives have been added according to the specific process sequence. The burning rateof gelled propellant is in the range of10~25mm/s under7MPa. The burning rate,combustion flame, combustion process and the energy characteristic parameters of theprepared gelled propellant have been studied and analyzed, by the method such asunderwater acoustic emission method, energy theoretic calculation method and so on. Theresults show that, the theoretical specific impulse250s, the combustion temperature is2500~3500K.2. The experimental results show that the gel propellant system has good safety,friction sensitivity is less than15%; under the condition of2.45MPa and in the66degreespendulum angle; explosion probability is less than20%, under10kg hammer impact andheight of125.86cm; stability experiments showed propellant liquid precipitation rate isless than3%, In the30Pa shear stress conditions and centrifugal force is670g last30min,and no solid precipitation appeared.3. The simulant gel propellant atomization morphology by double impinging jet hasbeen studied by experimental method and numerically stimulated method. Experimentalmethod is by high pressure conveying system and high speed camera to capture themorphology, and numerically simulated method took N-S equation and VOF (volume offluid) equation as the basic control equation and selected standard K-epsilon turbulencemodel. The numerical results are validated by comparing with the experimental results ofshadowgraph. Numerical simulation can capture the visual information which the naked eyes and high-speed camera cannot show.4. The small atomizing device has been built in our laboratory, on the basis of data andexperiences by experiment and numerical simulation, laying the ground for ignitionexperiment and studies in depth.