Numerical Investigation of Dual-Mode Operation in a Rectangular Scramjet Flowpath
Numerical Investigation of Dual-Mode Operation in a Rectangular Scramjet Flowpath
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DOI：
10.2514/1.b34994
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发表时间：
2014-03
影响因子：
1.9
通讯作者：
R. Yentsch;D. Gaitonde
中科院分区：
文献类型：
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作者：
R. Yentsch;D. Gaitonde
采用燃烧建模的三维湍流模拟来了解高超音速国际飞行研究实验飞行 2 超燃冲压发动机流路中遇到的基本现象。来自地面测试活动以及网格分辨率研究的实验数据用于验证模拟结果。然后利用这些已确认的结果来稳定地解释双模和超燃冲压发动机模式运行的物理原理，包括对激波结构、边界层分离和燃烧化学的详细检查。对飞行和地面测试的模拟进行比较，以表征入口对边界层发展和内部激波结构的影响。总体而言，与地面测试数据的一致性非常好，并且模拟显示了流路中高度复杂的三维结构。边界层分离引起的冲击-边界层相互作用在双模式操作中占主导地位，而在较高马赫数下......
Three-dimensional turbulent simulations with combustion modeling are employed to understand fundamental phenomena encountered in the Hypersonic International Flight Research Experimentation Flight 2 scramjet flowpath. Experimental data from the ground-test campaign as well as a grid resolution study are used to validate the results of the simulations. These confirmed results are then leveraged to explain the physics of dual- and scramjet-mode operation in a steady sense, including detailed examinations of shock structure, boundary-layer separation, and combustion chemistry. Simulations of the flight and ground tests are compared in order to characterize the effects of the inlet on the boundary-layer development and internal shock structures. Overall, agreement with ground-test data is excellent, and the simulations show highly complex three-dimensional structures in the flowpath. Boundary-layer separation induced shock–boundary-layer interactions dominate dual-mode operation, whereas at higher Mach number...