Start-up in a subscale full flow staged combustion cycle engine

In order to develop full flow staged combustion cycle engine (FFSC) technology, the starting process of a H₂/O₂subscale full-flow staged combustion cycle engine was studied. The characteristics of the full-flow cycle were described, and the design difficulties of starting process of this cycle were discussed in two points; the start-up of oxidizer-rich/fuel-rich preburners and relative timing control for them. A special start-up program for the subscale hot-fire test was presented. Modularization simulation codes based on a pipe-volume module disassembly method were developed to study the accurate start-up time interval, and simulation mathematical models of some typical components were presented. With application of the start-up program, stable operation and non-ablation were demonstrated in several hot-fire tests, and the results of simulation are consistent with those of tests.