EFFECT OF AN H2O2 ADDITIVE ON HYDROGEN IGNITION AND COMBUSTION IN A SUPERSONIC AIR-FLOW

The effect of small amounts of inert and reacting additives (such as h ydrogen peroxide, its decomposition products, CO2, etc.) on the igniti on and combustion of hydrogen in a high-temperature supersonic air flo w was studied experimentally. It is shown that direct doping of the fu el has little effect on the combustion of H-2, whereas injection of hy drogen peroxide or small amounts of pure hydrogen ahead of the nestle decreases suddenly the ignition delay, indicating the profound effect of the reaction products. Comparative experiments with inert additives showed that these additives only lead to a decrease in the air-flow t emperature.