Evaluation of Afterburning Chemistry in Solid-Rocket Motor Jets Using an Off-Line Model

Poubeau, Adèle; Paoli, Roberto; Cariolle, D.

doi:10.2514/1.a33311

Cited by 9 publications

(2 citation statements)

References 29 publications

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“…Local start time AVBP is widely used to resolve non-reactive or reactive unsteady flows in simple or complex geometry Gicquel et al (2011). It is also relevant to predict pollutant formation and atmospheric dispersion (Poubeau et al 2016;Paoli et al 2020).…”

Section: Trialmentioning

confidence: 99%

Assessing the Internal Variability of Large-Eddy Simulations for Microscale Pollutant Dispersion Prediction in an Idealized Urban Environment

Lumet,

Jaravel,

Rochoux

et al. 2024

Boundary-Layer Meteorol

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This study aims at estimating the inherent variability of microscale boundarylayer flows and its impact on the air pollutant dispersion in urban environment. For this purpose, we present a methodology combining a high-fidelity Large-Eddy Simulation (LES) model and a stationary bootstrap algorithm, to estimate the internal variability of time-averaged quantities over a given analysis period thanks to sub-averages samples. A detailed validation of a LES microscale air pollutant dispersion model in the framework of the Mock Urban Setting Test (MUST) field-scale experiment is performed. We show that the LES results are in overall good agreement with the experimental measurements of wind velocity and tracer concentration, especially in terms of fluctuations and peaks of concentrations. We also show that both LES estimates and the MUST experimental measurements are subject to a significant internal variability, which is therefore essential to take it into account in the model validation exercise. Moreover, we demonstrate that the LES model is able to accurately reproduce the observed internal variability. This study only accounts for the microscale wind fluctuations, and is therefore a first step in measuring the complete effect of the atmospheric boundary-layer (ABL) internal variability on pollutant dispersion.

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Section: Trialmentioning

confidence: 99%

Assessing the Internal Variability of Large-Eddy Simulations for Microscale Pollutant Dispersion Prediction in an Idealized Urban Environment

Lumet,

Jaravel,

Rochoux

et al. 2024

Boundary-Layer Meteorol

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“…The studies referenced above suggest that the supersonic jet impinges on the flame deflector. However, most studies have hitherto only focused on the flow field of a single impinging jet (Calhoon, 1998;Nakai et al, 2006;Poubeau et al, 2016), while studies on multiple impinging jets are relatively rare. As the interaction of plumes must be considered, the flow field of the multi-engine rocket exhaust gas impingement on the flame deflector is difficult to determine.…”

Section: Introductionmentioning

confidence: 99%

Numerical study for the flame deflector design of four-engine liquid rockets

Zhou

Zhang²,

2020

Engineering Applications of Computational Fluid Mechanics

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The thermal environment of four-engine liquid rocket exhaust plume impinging on the flame deflector with different impingement and uplift angles is analysed. The supersonic exhaust gas impinging model was established by using the compressible, multi-component, Reynolds-Averaged Navier-Stokes (RANS) equations with the finite volume method. A comparison between the numerical results and experimental data in the literature is made, which verified the validity and accuracy of the numerical model. Additionally, the flow fields of the four-engine rocket impinging on the flame deflector under different impingement and uplift angles are simulated. The results show that high temperatures on the deflector surface mainly occur on the impingement point or the cambered surface. A large impingement angle causes the reverse flow intensity to increase whilst a small angle causes the exhaust gas to deflect a little, a suitable uplift angle can smoothly guide the exhaust gas away from the deflector that the best thermal environment of the deflector channel appears at an impingement angle of 25°and an uplift angle of 5°. This study demonstrates that our model can effectively simulate the impinging flow field, and can be of use for the design of the flame deflector under the multi-engine rocket exhaust gas impact.

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Numerical analysis on thermal environment of liquid rocket with afterburning under different altitudes

Zhou

Wang

et al. 2020

Applied Thermal Engineering

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Evaluation of Afterburning Chemistry in Solid-Rocket Motor Jets Using an Off-Line Model

Cited by 9 publications

References 29 publications

Assessing the Internal Variability of Large-Eddy Simulations for Microscale Pollutant Dispersion Prediction in an Idealized Urban Environment

Assessing the Internal Variability of Large-Eddy Simulations for Microscale Pollutant Dispersion Prediction in an Idealized Urban Environment

Numerical study for the flame deflector design of four-engine liquid rockets

Numerical analysis on thermal environment of liquid rocket with afterburning under different altitudes

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