Numerical Study of the Effects of Engine Size on Rotating Detonation Engines
Numerical Study of the Effects of Engine Size on Rotating Detonation Engines
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DOI：
10.2514/6.2011-581
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发表时间：
2011-01
影响因子：
8.6
通讯作者：
D. Schwer;K. Kailasanath
中科院分区：
文献类型：
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作者：
D. Schwer;K. Kailasanath
旋转爆震发动机（RDE’s）代表了一种替代脉冲爆震发动机（PDE’s）的方法，可以从高效爆震循环中获得推进。由于它受到的关注少得多，因此与PDE相比，人们对一般流场以及诸如停滞条件、燃烧室尺寸和燃料混合物等参数对比冲的影响了解得较少。在本文中，我们使用了之前开发的模型，用于在二维和三维空间中进行RDE的时间精确计算，以检查不同发动机尺寸参数对质量流量，性能和推力的影响。具体的尺寸参数是微喷射器与端面壁的面积比、燃烧室直径和长度。此外，还对不同厚度的小型燃烧室进行了三维模拟。结果表明，对于这些参数中的许多参数，发动机的特性以可预测的方式扩展到高充气压力。在较低的充气压力下，结果更难以解释。比脉冲从3300秒（低压，大腔长）到5500秒不等。
Rotating detonation engines (RDE’s) represent an alternative to the extensively studied pulse detonation engines (PDE’s) for obtaining propulsion from the high efficiency detonation cycle. Since it has received considerably less attention, the general flow-field and effect of parameters such as stagnation conditions, combustion chamber sizing, and fuel mixture on specific impulse are less well understood than for PDE’s. In this paper we use a model developed previously for doing time-accurate calculations of RDE’s in two and three dimensions to examine the effect of different engine sizing parameters on mass flow rate, performance, and thrust. Specific sizing parameters that are discussed are area ratio of micro-injectors to head-end wall, combustion chamber diameter and length. Additionally, several three-dimensional simulations for small combustion chambers with different thicknesses are shown. Results indicate that for many of these parameters, the characteristics of the engine scale in predictable ways for high plenum pressures. At lower plenum pressures, the results are more difficult to interpret. Specific impulses varied from 3300 s (low-pressure, large chamber length) to 5500 s.