| 磁流体动力学磁控进气道流场分布数值模拟 |
| |
| 引用本文： | 沈双晏,金星.磁流体动力学磁控进气道流场分布数值模拟[J].强激光与粒子束,2015,27(12):124008. |
| |
| 作者姓名： | 沈双晏 金星 |
| |
| 作者单位： | 1.装备学院 激光推进及其应用国家重点实验室, 北京 1 01 41 6 |
| |
| 摘 要： | 采用磁流体控制的办法能提高超燃冲压发动机的推进性能。结合了Maxwell方程组和描述流体力学规律的Navier-Stokes方程组,并对这些方程进行了简化,建立了适用于计算磁流体动力学(MHD)超燃冲压发动机磁控进气道流场分布的数值模拟模型。研究了在特定工况下,流场特征、电势、电流以及提取功率等参数的变化。磁流体发生器能够降低管道出口马赫数和流向速度,降低出口处的总焓,但是出口处的温度有所提高。在电极上,电势保持常数,而绝缘壁面的电势较高,电场在电极端点出现周期性的极性。y方向电流在电极板附近很高,而在绝缘板上几乎为零。电流主要从正电极流向负电极,而且沿着x方向略有减小。y方向电流最大值出现在绝缘壁面上,而绝缘板上的z方向值几乎为零。z方向电流最大值出现在管道的边角处,而在绝缘壁面上几乎为零,电流在绝缘壁面的法线分量为零。
|
| 关 键 词： | 超燃冲压发动机 磁控进气道 数值模拟 流场分布 电流变化 |
| 收稿时间： | 2015-07-03 |
Numerical simulation of MHD magnetic control inlet flow field distribution |
| |
| Affiliation: | 1.State Key Laboratory of Laser Propulsion &Application,Equipment Academy,Beijing 101416,China |
| |
| Abstract: | The use of magnetic control method could improve the scramjet propulsion performance. The Maxwell equations and N-S equations were combined and these equations were simplified. The flow field numerical simulation model of distribution was established to calculate the MHD scramjet magnetic inlet flow field. The flow field characteristic, electric potential, current and power extraction were studied under certain conditions. MHD generator could reduce the Mach number flow speed and total enthalpy at the exit of the pipe. However, the temperature would increase at the exit of the pipe. The electric potential remained constant at the electrode and the electric potential was higher on the insulation wall and the electric field at the electrode endpoint changed periodically. The current along y direction near the plate electrode was very high and almost zero on the insulation board. The current mainly flowed from the positive electrode to the negative electrode and slightly decreased along the x direction. The maximum current along y direction appeared on the insulation wall and the current along z direction was almost zero on the insulation wall. The z direction current appears at the corner of the pipe and the z direction current on the insulation wall was almost zero. The normal component of the current on the insulation wall was almost zero. |
| |
| Keywords: | |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《强激光与粒子束》浏览原始摘要信息 |
|
点击此处可从《强激光与粒子束》下载全文 |
|
