Flow-Based Prediction for Self-Starting Limit of Two-Dimensional Hypersonic Inlets
- Resource Type
- Authors
- Shengmin Guo; Guang-fu Ma; Wen-zhong Xie; Wen Yufen; Chen Hao; Rong-wei Guo
- Source
- Journal of Propulsion and Power. 32:463-471
- Subject
- 020301 aerospace & aeronautics
Hypersonic speed
geography
Engineering
geography.geographical_feature_category
business.industry
Mechanical Engineering
Bubble
Flow (psychology)
Hypersonic flight
Aerospace Engineering
02 engineering and technology
Inlet
01 natural sciences
010305 fluids & plasmas
Flow separation
Fuel Technology
0203 mechanical engineering
Space and Planetary Science
0103 physical sciences
Scramjet
Aerospace engineering
business
Ramjet
- Language
- ISSN
- 1533-3876
0748-4658
Hypersonic inlet self-starting ability is of great importance for scramjet engines and hypersonic flight vehicles to operate stably and efficiently. However, the prediction of the hypersonic inlet self-starting limit is generally difficult. This paper proposes a flow-based prediction approach for the self-starting limiting internal contraction ratio of two-dimensional hypersonic inlets. The key lies in the establishment of a general approximate expression for the fluid dynamic blockage, caused by the migration of the primary separation bubble down the internal contraction portion of the inlet. Formulas for the fluid dynamic blockage and the limiting internal contraction ratio are given. The predicted results are in good agreement with the published experimental results on hypersonic inlet starting.