来流条件对SFRJ燃速及自持燃烧性能的影响

doi:10.7527/S1000-6893.2015.0212

流体力学与飞行力学

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来流条件对SFRJ燃速及自持燃烧性能的影响

巩伦昆, 陈雄, 周长省, 李映坤, 朱敏

南京理工大学机械工程学院, 南京 210094

收稿日期:2015-06-02 修回日期:2015-07-30 出版日期:2016-05-15 发布日期:2015-08-03
通讯作者: 陈雄,Tel.:025-84315605 E-mail:chenxiong@njust.edu.cn E-mail:chenxiong@njust.edu.cn
作者简介:巩伦昆,男,博士研究生。主要研究方向:固体燃料冲压发动机设计。 E-mail:glunkun@163.com;陈雄,男,博士,副教授。主要研究方向:发动机传热烧蚀,冲压发动机技术。Tel:025-84315605 E-mail:chenxiong@njust.edu.cn;周长省,男,硕士,教授。主要研究方向:火箭发动机总体设计。Tel:025-84315452 E-mail:zhouchangsheng814@163.com;李映坤,男,博士研究生。主要研究方向:双脉冲发动机。 E-mail:lyk1007@126.com;朱敏,男,博士研究生。主要研究方向:冲压发动机设计。 E-mail:1356885709@qq.com

Effect of inlet flow condition on regression rate and self-sustained combustion of solid fuel ramjet

GONG Lunkun, CHEN Xiong, ZHOU Changsheng, LI Yingkun, ZHU Min

School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

Received:2015-06-02 Revised:2015-07-30 Online:2016-05-15 Published:2015-08-03

摘要/Abstract

摘要：

为了研究来流条件对固体燃料燃速以及自持燃烧性能的影响规律,采用3阶单调迎风格式(MUSCL)重构方法,AUSMPW⁺通量分裂格式,k-w剪切应力输运(SST)湍流模型,7组分3反应有限速率化学反应模型以及2阶矩湍流燃烧模型,编制了二维轴对称湍流燃烧仿真程序。仿真结果显示:来流质量流率和总温的增加会提高燃速,温度和质量通量的影响指数大约为0.95~1.00和0.67;来流条件影响燃速的主要机理是壁面附近温度和湍流黏性的变化,其中湍流黏性是主要影响因素;随着质量流率的增加,特征速度逐渐降低,当入口马赫数接近1时,特征速度大约为850 m/s,固体燃料将无法自持燃烧。

关键词: 固体燃料冲压发动机, 燃速, 来流条件, 数值仿真, 自持燃烧

Abstract:

In order to investigate the influence of inlet flow condition on regression rate and self-sustained combustion of solid fuel ramjet, a 2d axisymmetric turbulent flow and combustion program is developed. The equation is solved using MUSCL reconstruction method and AUSMPW⁺ flux splitting technique, with k-w shear stress transport (SST) turbulence model, 7 species/3 reaction kinetics finite rate model and second-order moment turbulence-chemistry model. The simulation results show that the increases of air mass rate and total temperature enhance the regression rate and the exponents for them are 0.95-1.00 and 0.67. The variation of regression rate for different inlet flow conditions is caused by the variation of temperature and turbulent viscosity while turbulent viscosity is the predominant factor. Characteristic velocity decreases with the increase of air mass rate. The characteristic velocity is about 850 m/s and combustion could not sustain when the Mach number at inlet reaches about 1.

Key words: solid fuel ramjet, regression rate, inlet flow condition, numerical simulation, self-sustained combustion

中图分类号:

V235

巩伦昆, 陈雄, 周长省, 李映坤, 朱敏. 来流条件对SFRJ燃速及自持燃烧性能的影响[J]. 航空学报, 2016, 37(5): 1428-1439.

GONG Lunkun, CHEN Xiong, ZHOU Changsheng, LI Yingkun, ZHU Min. Effect of inlet flow condition on regression rate and self-sustained combustion of solid fuel ramjet[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(5): 1428-1439.

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E-mail：hkxb@buaa.edu.cn

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来流条件对SFRJ燃速及自持燃烧性能的影响

Effect of inlet flow condition on regression rate and self-sustained combustion of solid fuel ramjet

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