What does this research mean for the field?

In Mach 6 hypersonic flow, the drag reduction effectiveness of an opposing jet decreases with higher angles of attack due to windward flow compression, but this deterioration can be mitigated by applying an appropriate jet deflection angle to shift the shock intersection point downstream. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To investigate the influence of angle of attack, jet pressure ratio, and jet deflection angle on the flow field structure and drag reduction performance of opposing jets in hypersonic flow.

August 22, 2026Advances in AerodynamicsOpen Access

Experimental and numerical analysis on opposing jet for drag reduction in hypersonic flow with angles of attack

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Authors

XZXudong ZhangNanjing University of Aeronautics and Astronautics HDHao DongNanjing University of Aeronautics and Astronautics KLKaixin LiGuizhou University

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Implication

Experimental and numerical analysis demonstrates opposing jet deflection restores drag reduction efficiency in Mach 6 hypersonic flow at angles of attack, suggesting improved flight control.

Key Points

To investigate the influence of angle of attack, jet pressure ratio, and jet deflection angle on the flow field structure and drag reduction performance of opposing jets in hypersonic flow.
Conducted experimental and numerical investigations in a Mach 6 freestream.
Analyzed flow field structures and surface pressures across variations in jet pressure ratios (up to 0.60), angles of attack (0° to 6°), and jet deflection angles.
Drag reduction increased with higher jet pressure ratios, achieving a maximum reduction of 32.67% at a pressure ratio of 0.60.
Increasing the angle of attack from 0° to 6° caused a 5.44% decline in drag reduction efficiency due to strong windward compression and amplified reattachment shock peak pressures.
Deflecting the jet nozzle at higher angles of attack improved drag reduction by up to 2.65% by shifting the bow shock and reattachment shock intersection point downstream and away from the body.

Cite This Study

Zhang et al. (2026) studied this question.

synapsesocial.com/papers/6a895f9cca7ade938187e63d https://doi.org/10.1186/s42774-025-00240-5

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Implication

Experimental and numerical analysis demonstrates opposing jet deflection restores drag reduction efficiency in Mach 6 hypersonic flow at angles of attack, suggesting improved flight control.

Experimental and numerical analysis on opposing jet for drag reduction in hypersonic flow with angles of attack

Discussion

Member takes

Implication

Key Points

Cite This Study

Experimental and numerical analysis on opposing jet for drag reduction in hypersonic flow with angles of attack

Discussion

Member takes

Implication

Key Points

Cite This Study

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