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the claim

A flame trench deflects rocket exhaust and acoustic energy during launch.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
5 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that a flame trench deflects rocket exhaust and acoustic energy during launch?

Yes. Multiple engineering and acoustic studies confirm that flame trenches and their integrated deflectors successfully redirect high-velocity rocket exhaust and mitigate intense acoustic and thermal loads during lift-off.

Verdict: SUPPORTED · 5 sources for, 0 against · Last checked

The analysis

The claim states that a flame trench deflects rocket exhaust and acoustic energy during launch. Papers [0], [1], and [6] analyze the deflection of rocket exhaust plumes by flame deflectors. Papers [2], [3], and [9] directly address how flame trenches and deflectors interact with and redirect acoustic energy and noise generated during lift-off. Thus, the evidence thoroughly supports the claim.

Evidence for · 5
Numerical study for the flame deflector design of four-engine liquid rockets
2020
Analyzes how flame deflectors within trenches successfully redirect high-temperature rocket exhaust plume flow during launches.
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Zhou, Z., Zhang, L., & Le, G. (2020). Numerical study for the flame deflector design of four-engine liquid rockets. doi.org. https://doi.org/10.1080/19942060.2020.1761453

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More for · 4
Numerical studies on four-engine rocket exhaust plume impinging on flame deflectors with afterburning
2020
Investigates the fluid dynamics of rocket exhaust impinging on flame deflectors to safely guide supersonic plumes away from the launch pad.
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Zhou, Z., Changfang, Z., Lu, C., & Le, G. (2020). Numerical studies on four-engine rocket exhaust plume impinging on flame deflectors with afterburning. doi.org. https://doi.org/10.1016/j.dt.2020.06.016

Computation of the noise radiated by a hot supersonic jet deflected in a flame trench.
2021
Examines how a hot supersonic jet entering a flame trench and impinging on a deflector guides the flow and influences acoustic radiation.
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Langenais, A., Vuillot, F., Troyes, J., & Lambaré, H. (2021). Computation of the noise radiated by a hot supersonic jet deflected in a flame trench.. doi.org. https://doi.org/10.1121/10.0003759

Flow and acoustics in a model rocket flame deflector and deflector cover
2023
Investigates passive noise reduction methods utilizing an inclined flame deflector to decrease acoustic loads and manage wave propagation during a rocket launch.
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Yenigelen, E. & Morris, P. J. (2023). Flow and acoustics in a model rocket flame deflector and deflector cover. doi.org. https://doi.org/10.1177/1475472X231199184

Rocket flame trench analysis with COMSOL multi-physics software
2025
Explicitly details that a flame trench and its deflector structure are designed to displace and redirect both intense heat and acoustical pressure.
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Pelham, L. G. (2025). Rocket flame trench analysis with COMSOL multi-physics software. doi.org. https://doi.org/10.1121/10.0041224

Receipt History
first checked04 Aug 2026
judged → SUPPORTED · 8404 Aug 2026
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