Study On Canted Scarfed Flow-backward Multi-nozzle SRM

This paper bases on the theoretical study and the test validation method to predict the performance of canted scarfed flow-backward multi-nozzle.The SRM collectivity of canted scarfed flow-backwards nozzle is designed. A kind of SRM with short-action time structure was put forward. This paper analyses the relation of the main designed parameters. These parameters include action pressure, canted angles of nozzle, the total length of SRM, the throat diameter, and the total weight etc. It introduces the SRM grain, interior ballistic, the ignition and structure design too.The entity model of SRM with canted flow-backwards multi-nozzle is achieved by using UG software. Based on the entity model, the mass model is established by using response surface method. The optimized aim is impulse-to-mass ratio maximization. According to the optimized aim and confined size, the parameter optimization of the SRM with canted scarfed flow-backward nozzle was achieved.The internal flowfield of the SRM with canted scarfed flow-backwards multi-nozzle is calculated by using Fluent software. The result showed that because of canted nozzle, the nozzle throat appears the throat concentration phenomenon. Fluid glutinosity near throat wall is biggish and distributed asymmetrically. There is shock wave in the nozzle scarfed segment, and it will influence the performance of SRM. Shock wave could increase ablation and heat exchange in nozzle extension.At last, this paper introduces test method of this kind of SRM and the experimental results of principle prototype. The result verified the design.The result of this paper provided use of reference to the same kind of SRM.