A model for simulating the transient process for combustion chamber of bipropellant attitude-control engine

In order to simulate the transient operating process of the combustion chamber of bipropellant attitude-control engine, a quasi-1D simulation model for analyzing the working process of bipropellant attitude-control engine was established, in which hypergolic ignition process and spray combustion process were coupled, a new method for calculating the gas parameter within combustion chamber was proposed and, a sub-module for calculating the spray mass was developed, involving the influences of injector cavity filling and ejecting processes. The transient operating process of EADS's 10N attitude-control engine was analyzed using this model. The results, including vacuum thrust, droplet distribution and total impule, were presented and compared with experimental data from open literature. The result shows good agreement with experimental data. This model is capable of providing basis for the design and performance analysis of bipropellant attitude-control engines.