Firing rocket engines into a supersonic wind presents severe aerodynamic and structural stability challenges
Studies on transverse jet injection into supersonic flows consistently demonstrate that firing or injecting jets into a supersonic crossflow creates severe aerodynamic disturbances, shock-boundary layer interactions, total pressure losses, and flow stability challenges.
The claim is specific and empirical, dealing with the aerodynamics of injecting jets/rockets into supersonic crossflows. Multiple retrieved papers (such as [1], [3], [4], [10], and [11]) explicitly discuss the pressure losses, shock-wave interactions, instabilities, and unstart phenomena that substantiate these aerodynamic and structural stability challenges. None of the papers refute the claim.
Runsheng Hu, Qing-lian Li, Chun Li, Chen-yang Li. Effects of an accompanied gas jet on transverse liquid injection in a supersonic crossflow. 2019. https://doi.org/10.1016/J.ACTAASTRO.2019.01.040
Paper [1] notes that gas and liquid injection into a supersonic crossflow causes additional total pressure losses.
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Srinivas M. V. V., Aruna Rajagopal, Lebonah B., J. M. Internal aerodynamics of supersonic crossflows with transverse liquid injection. 2025. https://doi.org/10.1063/5.0268033
Paper [3] documents complex shock wave-boundary layer interactions, separation zones, and bow shock oscillations resulting from transverse jet injection in supersonic flow.
I. Rasheed, Debi Prasad Mishra. Combustion characteristics of a transverse jet in supersonic crossflow with varying inflow conditions. 2025. https://doi.org/10.1063/5.0264126
Paper [4] demonstrates that injecting transverse jets into supersonic crossflows creates complex shock structures and total pressure losses that impact combustor performance.
Hu J, Chang J, Wang L, Cao S, Bao W. Unstart coupling mechanism analysis of multiple-modules hypersonic inlet.. 2013. https://doi.org/10.1155/2013/254376
Paper [10] highlights how backpressure and jet-flow interactions can induce severe unstart phenomena and flow instabilities in hypersonic inlet modules.
Hongyu Wang, Gang Wang, Hongxun Li, Tao-YANG Li. Effects of Pulse Discharge on Transverse Jet Mixing in Supersonic Crossflow. 2025. https://doi.org/10.2514/1.j065685
Paper [11] discusses how pulsed injection and shock interactions create strong bow shock modulations, instabilities, and large-scale turbulent fluctuations in supersonic flows.
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