Design and experiment research for oxygen-rich preburner of FFSC

A design scheme of oxygen-rich preburner with division combustion,downstream dilution and nickel coatings was presented based on the full flow staged combustion(FFSC) rocket engine cycle.The firing sequence of fuel-rich starting-up and oxygen-rich shutting-down was designed and 26 times experiments were completed.The influence of the different downstream dilution flux on the uniformity of the product temperature was investigated primarily.The results show that the structure of preburner is rational,and the reliability of ignition and security of structure are reached.The distribution of the product temperature is influenced remarkably by downstream dilution in the experiments.And,an optimum downstream dilution flux exists.