### 超临界压力下RP-3航空煤油吸热裂解反应的数值研究

1. 1. 西北工业大学 动力与能源学院, 陕西 西安 710072;
2. 中国空气动力研究与发展中心 高超声速冲压发动机技术重点实验室, 四川 绵阳 621000
• 收稿日期:2013-07-22 修回日期:2014-02-20 出版日期:2014-06-25 发布日期:2014-03-07
• 通讯作者: 宋文艳，Tel.：029-88494852 E-mail：wenyan_song@nwpu.edu.cn E-mail:wenyan_song@nwpu.edu.cn
• 作者简介:赵国柱男，博士研究生。主要研究方向：超燃冲压发动机热防护。 E-mail：dfer-long@163.com；宋文艳女，教授，博士生导师。主要研究方向：超燃冲压发动机总体性能研究。Tel：029-88494852 E-mail：wenyan_song@nwpu.edu.cn；张若凌男，博士，研究员。主要研究方向：超燃冲压发动机热防护。Tel：0816-2466394 E-mail：zhangruoling@cardc.cn

### Numerical Study on Thermal Cracking of RP-3 Aviation Kerosene Under Supercritical Pressure

ZHAO Guozhu1, SONG Wenyan1, ZHANG Ruoling2

1. 1. College of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China;
2. Science and Technology Laboratory on Scramjet, China Aerodynamics Research and Development Center, Mianyang 621000, China
• Received:2013-07-22 Revised:2014-02-20 Online:2014-06-25 Published:2014-03-07

Abstract:

In order to understand the thermal cracking characteristic of hydrocarbon fuel under supercritical pressure in the regenerative cooling progress, a numerical study on the thermal cracking of RP-3 aviation kerosene under 5 MPa is conducted based on a four-species surrogate model of RP-3. A modified Kumar-Kunzru model consisting of 18 species and 24 reactions is used to simulate the cracking process. The effect of thermal cracking on the thermophysical properties and heat transfer of the fluid is investigated. The effect of secondary reactions on the thermal cracking of RP-3 aviation kerosene is also studied at high conversion of RP-3. Numerical results show that the conversion of RP-3 is higher than 20% with a relative proportion of aromatics of 12.1% once the fluid temperature reaches 890 K. The thermophysical properties of the fluid change obviously when the thermal cracking of RP-3 occurs. The wall temperature and fluid temperature decrease by 130 K and 129 K respectively at the tube outlet. Meanwhile, the Nusselt number increases by 16.5%, indicating that the heat transfer is enhanced. The secondary reactions affect the thermal cracking of RP-3 obviously at high conversion. It is found that the conversion of RP-3 with secondary reactions is 29.1% lower than that without secondary reactions. Meanwhile, the wall temperature and fluid temperature decrease by 34 K and 22 K respectively at the tube outlet.