Experiment on the oxidation and ignition delay characteristics of RP-3 kerosene/oxygen
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摘要:
在流动管反应器中对当量比分别为0.5、1.0、2.0、温度范围为550～1200 K、压力分别为0.1、3.0 MPa条件下RP-3航空煤油/O2的氧化特性进行了试验测试。结果表明：当量比由0.5增加到2.0时，RP-3航空煤油/O2氧化过程中各组分生成的起始温度以及出现摩尔分数峰值时的温度均升高；压力由0.1 MPa升高到3.0 MPa时，RP-3航空煤油/O2氧化过程中各组分生成的起始温度以及出现摩尔分数峰值时的温度均降低，烷烃的摩尔分数峰值升高，而烯烃的摩尔分数峰值则降低。同时，在激波管中对当量比分别为0.8、3.5、压力分别为0.2、1.0、5.0 MPa、温度范围为950～1500 K条件下RP-3航空煤油/O2的着火延迟特性进行了试验测试。结果表明，RP-3航空煤油/O2的着火延迟时间随压力与温度的升高、当量比由3.5减小到0.8时逐渐缩短。
Abstract:The oxidation characteristics of RP-3 kerosene/O2 were experimentally tested in the flow reactor under the conditions of the equivalence ratios of 0.5, 1.0 and 2.0, the temperature range of 550−1200 K, the pressure of 0.1, 3.0 MPa. The results showed that, with the increase of equivalent ratio from 0.5 to 2.0, the starting temperature of each species formation and the corresponding temperature of the peak mole fraction of each species increased. With the increase of pressure from 0.1 MPa to 3.0 MPa, the starting temperature of each species formation and the corresponding temperature of the peak mole fraction of each species decreased, and the peak mole fraction of alkanes increased while that of alkenes decreased. Meanwhile, the ignition delay characteristics of RP-3 kerosene/O2 were experimentally tested in the shock tube under the conditions of the equivalent ratios of 0.8, and 3.5, the pressure of 0.2, 1.0, and 5.0 MPa, the temperature range of 950−1500 K. The results showed that, with the increase of the pressure and temperature or the decrease of equivalent ratio from 3.5 to 0.8, the ignition delay time of RP-3 kerosene/O2 was shortened.
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Key words:
- RP-3 kerosene /
- oxidation characteristics /
- flow reactor /
- shock tube /
- ignition delay time
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图 1 高压流动管反应器试验测试系统
Figure 1. Experimental system of the high pressure flow tube reactor
图 3 流动管反应器内轴向温度分布曲线
Figure 3. Axial temperature distribution curve in flow tube reactor
图 4 当量比对主要组分摩尔分数随温度变化趋势的影响（p=0.1 MPa）
Figure 4. Effect of equivalence ratio on the variation trend of the main species mole fraction with temperature （p=0.1 MPa）
图 5 压力对主要组分摩尔分数随温度变化趋势的影响（ϕ=2.0）
Figure 5. Effect of pressure on the variation trend of the main species mole fraction with temperature （ϕ=2.0）
图 6 不同着火方式的着火延迟时间定义
Figure 6. Definition of ignition delay time for different ignition modes
图 7 不同工况下RP-3航空煤油/O2的着火延迟时间
Figure 7. Ignition delay time of RP-3 kerosene/O2 under different conditions
表 1 氧化特性试验工况
Table 1. Test conditions for oxidation characteristics
工况编号 ϕ 摩尔分数 RP-3 O2 He 1 0.5 0.003 0.10547 0.89153 2 1.0 0.003 0.05273 0.94427 3 2.0 0.003 0.02637 0.97063 
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表 2 着火延迟特性试验工况
Table 2. Test conditions for ignition delay characteristics
工况编号 $ \phi $ 摩尔分数 RP-3 O2 Ar 1 0.8 0.00178 0.03822 0.96 2 3.5 0.00676 0.03324 0.96
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表 3 RP-3航空煤油/O2的着火延迟时间（ϕ=0.8）
Table 3. Ignition delay time of RP-3 kerosene/O2 （ϕ=0.8）
p/MPa Tini/K $ {\tau _{{\text{ign}}}} $/μs 0.2 1081 5780 1094 4750 1106 4315 1122 3673 1147 3013 1163 2120 1179 2352 1205 1651 1237 1253 1277 854 1328 567 1379 324 1.0 991 7781 1007 5706 1008 6189 1053 4170 1079 2842 1098 2455 1132 1726 1148 1293 1168 915 1236 643 1267 415 1301 286 1313 283 5.0 963 3348 990 2863 1028 2150 1054 1683 1114 981 1157 560 1213 339 1262 216
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表 4 RP-3航空煤油/O2的着火延迟时间（ϕ=3.5）
Table 4. Ignition delay time of RP-3 kerosene/O2 （ϕ=3.5）
p/MPa Tini/K ${\tau _{{\text{ign}}}} $/μs 1.0 998 3471 1018 3673 1074 3179 1114 2340 1127 1344 1181 1311 1208 1091 1283 668 1357 409 1446 209 1520 109 5.0 1208 363 1274 238 1307 206 1359 152 1415 110 1440 104
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