[1]胡明媛,董 刚,陈耀慧,等.斜激波与反应性气体界面作用的数值模拟[J].弹道学报,2019,(01):60.[doi:10.12115/j.issn.1004-499X(2019)01-011]
 HU Mingyuan,DONG Gang,CHEN Yaohui,et al.Numerical Simulation on Interaction Between Oblique ShockWave and Reactive Gaseous Interface[J].Journal Of Ballistics,2019,(01):60.[doi:10.12115/j.issn.1004-499X(2019)01-011]
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斜激波与反应性气体界面作用的数值模拟()
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《弹道学报》[ISSN:1004-499x/CN:32-1343/TJ]

卷:
期数:
2019年01期
页码:
60
栏目:
出版日期:
2019-03-30

文章信息/Info

Title:
Numerical Simulation on Interaction Between Oblique ShockWave and Reactive Gaseous Interface
文章编号:
1004-499X(2019)01-0060-08
作者:
胡明媛董 刚陈耀慧栗保明
南京理工大学 瞬态物理国家重点实验室,江苏 南京 210094
Author(s):
HU MingyuanDONG GangCHEN YaohuiLI Baoming
National Key Laboratory of Transient Physics,Nanjing University of Science and Technology,Nanjing 210094,China
关键词:
斜激波 气体界面 时间尺度 着火 数值模拟
Keywords:
oblique shock wave gaseous interface time scale ignition numerical simulation
分类号:
O382
DOI:
10.12115/j.issn.1004-499X(2019)01-011
文献标志码:
A
摘要:
为解决新概念冲压加速器加速过程中的不启动问题,提出了在加速管内进行分层充气的概念,利用斜激波与分层可燃气体界面相互作用来实现装置的正常启动。采用高精度数值模拟的方法研究了这一相互作用的过程,考察了不同来流速度(斜激波强度)和可燃预混气体的充填量对该过程的影响,提出了相互作用过程引发着火燃烧的时间尺度条件,估算了不同来流速度下的推力性能。研究结果表明:较大的来流速度和更多的可燃预混气体充填量有利于着火的发生; 着火是否发生受化学反应和分层气体界面不稳定的双重影响,当化学反应延迟时间尺度小于流动时间尺度时,可以发生着火燃烧; 燃烧后的流场表现为爆轰波和非预混火焰界面共同存在的特殊模式; 在较大的来流速度下,燃烧场的推力性能更高、更稳定。
Abstract:
In order to solve the unstart during the acceleration of the new concept ram accelerator,the stratified charging concept in the accelerating tube was proposed,and the interaction between an oblique shock wave and a reactively stratified gaseous interface was used to achieve normal start of the device. The numerical simulations with high-resolution scheme were carried out for the interaction. The effects of different inflow velocities(intensity of oblique shock wave)and the filling amount of combustible premixed gas on the interaction process were studied. The time scale conditions of the combustion process during the process were proposed,and the thrust performances under different inflow velocities were estimated. The results show that the higher inflow velocity and more filling amount of flammable premixed gas are in favor of the occurrence of ignition. Both the chemical reaction and the gas interface instability affect whether the ignition occurs. When the delay time scale of chemical reaction is smaller than the flow time scale,the ignition occurs. The flow field of combustion can be featured by a special mode in which the detonation wave and the non-premixed flame interface coexist. Under the conditions of higher inflow velocity,the thrust performance of the combustion field is higher and more stable.

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备注/Memo

备注/Memo:
收稿日期:2018-09-20
基金项目:国家自然科学基金项目(11872213); 装备预研重点实验室基金项目
作者简介:胡明媛(1994- ),女,硕士研究生,研究方向为可压缩反应流与内弹道。E-mail:mercury.my.hu@foxmail.com。
通信作者:董刚(1970- ),男,研究员,工学博士,研究方向为可压缩反应流的数值模拟。E-mail:dgvehicle@yahoo.com。
更新日期/Last Update: 2019-03-10