EFFECT OF STEAM INJECTION INTO GAS GENARATOR ON COMBUSTION EFFICIENCY AND PRESSURE LOSS

The influence of steam injection into combustor on combustion efficiency and pressure loss in the combustor is investigated.The testing was conducted with a WZ 5 gas genarator burning low BUT gaseous fuel (H uv =8172kJ/N·m 3).The steam injection was arranged in either the diffuser or the dilution zone of the combustor.The test results show that the steam injection has only a little effect on combustion efficiency and a considerable effect on pressure loss.In the case of the ratio of steam flow rate to air flow rate being 10%,the steam injection into dilution zone would cause an 12% increase in pressure loss,and even larger than that the steam injection into diffuser would cause.