燃气发生器中注入水蒸汽对燃烧效率和总压损失的影响

试验是在一个 WZ- 5燃气发生器上进行的 ,燃料用低热值气态燃料 (体积热值为 8172 k J/N· m3) ;水蒸汽可由燃烧室前部或从后部掺混孔处注入。试验结果表明 ,水蒸汽注入对燃烧效率影响不大而使总压损失增加。当水蒸汽流量与总空气流量之比为 10 % ,且水蒸汽从后部掺混孔处注入 ,则总压损失会增大 12 %左右 ;如果水蒸汽从前排注入 ,则总压损失会更大些。

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.