石蜡燃料的燃烧性能与其化学组成的关系
发布时间：2019-04-27 10:20
【摘要】：为了研究石蜡的燃烧性能与其化学组成之间的关系,针对54~#、58~#、62~#和66~#4种粗晶石蜡开展了气相色谱分析,并测试了4种石蜡的燃烧热和在氧气流中的瞬时退移速率,同时利用N ASA-C EA软件计算了4种石蜡燃料不同氧燃比下的能量特性。结果表明:54~#、58~#、62~#和66~#4种粗晶石蜡的平均分子式分别为C_(26.40)H_(54.80)、C_(27.59)H_(57.18)、C_(28.02)H_(58.04)和C_(32.11)H_(66.22),正构烷烃含量分别为92.79%、89.44%、88.36%和84.55%;平均碳数n越大、正构烷烃含量越小的石蜡其燃烧热越低;随着平均碳数n值的增大以及正构烷烃含量的降低,石蜡的退移速率降低。NASA-CEA程序计算得到4种石蜡的能量特性受其化学组成的影响很小,其最佳氧燃比均为2.7,对应的理论比冲约为354 s,绝热火焰温度约为3600 K。
[Abstract]:In order to study the relationship between the combustion properties of paraffin wax and its chemical composition, gas chromatographic analysis was carried out on four coarse-grained paraffin wax (54, 58, 62 and 66). At the same time, the combustion heat of four paraffin wax and the instantaneous desorption rate in oxygen flow were measured, and the energy characteristics of four paraffin fuels with different oxygen-fuel ratios were calculated by N-ASA-C EA software. The results showed that the average molecular formulas of the crude paraffin wax were C26.40 H54.80, C27.59 H57.18, respectively, and the average molecular formulas of the crude paraffin wax were 54%, 58%, 62% and 66%, respectively, and the average molecular formulas were C26.40 H54.80, C27.59 H57.18, respectively. C _ (28.02) H _ (58.04) and C _ (32.11) H _ (66.22), the contents of n-alkanes were 92.79%, 89.44%, 88.36% and 84.55%, respectively. The higher the average carbon number n, the lower the combustion heat of paraffin wax with lower n-alkane content; With the increase of the average carbon number n and the decrease of n-alkane content, the demigration rate of paraffin wax decreases. The results of NASA-CEA program show that the energy characteristics of four paraffin wax are little affected by their chemical composition, and the optimum oxygen-fuel ratio is 2.7. The corresponding theoretical specific impulse is about 354s and the adiabatic flame temperature is about 3600 K.
【作者单位】： 南京理工大学化工学院;
【基金】：工信部自主科研专项基金资助
【分类号】：TE626.88;V436
本文编号：2466898
[Abstract]:In order to study the relationship between the combustion properties of paraffin wax and its chemical composition, gas chromatographic analysis was carried out on four coarse-grained paraffin wax (54, 58, 62 and 66). At the same time, the combustion heat of four paraffin wax and the instantaneous desorption rate in oxygen flow were measured, and the energy characteristics of four paraffin fuels with different oxygen-fuel ratios were calculated by N-ASA-C EA software. The results showed that the average molecular formulas of the crude paraffin wax were C26.40 H54.80, C27.59 H57.18, respectively, and the average molecular formulas of the crude paraffin wax were 54%, 58%, 62% and 66%, respectively, and the average molecular formulas were C26.40 H54.80, C27.59 H57.18, respectively. C _ (28.02) H _ (58.04) and C _ (32.11) H _ (66.22), the contents of n-alkanes were 92.79%, 89.44%, 88.36% and 84.55%, respectively. The higher the average carbon number n, the lower the combustion heat of paraffin wax with lower n-alkane content; With the increase of the average carbon number n and the decrease of n-alkane content, the demigration rate of paraffin wax decreases. The results of NASA-CEA program show that the energy characteristics of four paraffin wax are little affected by their chemical composition, and the optimum oxygen-fuel ratio is 2.7. The corresponding theoretical specific impulse is about 354s and the adiabatic flame temperature is about 3600 K.
【作者单位】： 南京理工大学化工学院;
【基金】：工信部自主科研专项基金资助
【分类号】：TE626.88;V436
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