Numerical Simulation of Supersonic Jet Impingement on Inclined Plate

Dharavath, Malsur; Chakraborty, Debasis

doi:10.14429/dsj.63.2545

Cited by 15 publications

(4 citation statements)

References 18 publications

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“…Similarly, experimental and simulation work reported in Ref. [20] involving gas jet impingement on inclined target plates shows that the radial pressure distribution is skewed, as seen in Fig. 10.…”

Section: Exitsupporting

confidence: 65%

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Analysis Methods for High Energy Line Break Jet Flows in Nuclear Power Plants

Charrouf

Kauffman

Yoon

et al. 2020

Journal of Nuclear Engineering and Radiation Science

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The effects of postulated accidents, including dynamic effects of pipe ruptures, must be analyzed for licensing of nuclear power plants (NPPs). Applicants and licensees of NPPs have struggled to address U.S. Nuclear Regulatory Commission (NRC) expectations to assess if high energy line break (HELB) jet impingement on structures and components can lead to dynamic amplification, and to accurately simulate blast wave-induced loadings. In this paper, evaluation of the potential for load amplification and occurrence of resonance conclusively demonstrates that the phenomenon does not occur. In a HELB, several physical parameters of jets issuing from a ruptured pipe - such as non-equilibrium condensation of steam, unsteady separation between the jet exit and target, non-orthogonal alignment of jet axis to impingement surface, uneven impingement surfaces, or mismatch of jet excitation frequency and target natural frequency - prevent occurrence of the phase lock conditions needed to initiate and maintain a resonance. The analytical approach to evaluate the blast wave-induced loading applied a pressure vessel burst (PVB) correlation instead of performing time consuming CFD analysis for all break locations. Three dimensional CFD analysis of blast wave transient propagation provided the basis to develop benchmarking factors for use with the PVB correlation. The simplified methodology utilizes shockwave reflection, shape, and environment factors for application to impacted targets, which significantly reduces the amount of time to evaluate all break locations. The modified PVB method is also more appropriate than an explosion-type correlation to model the blast wave pressures from steam pipe breaks.

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Section: Exitsupporting

confidence: 65%

“…Additionally, rather than the repeating pattern of resonant frequency stages as plate separation increases described in Ref. [4], pressure amplitude decreases with nozzle-inclined plate separation [20].…”

Section: Exitmentioning

confidence: 88%

Analysis Methods for High Energy Line Break Jet Flows in Nuclear Power Plants

Charrouf

Kauffman

Yoon

et al. 2020

Journal of Nuclear Engineering and Radiation Science

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“…log-normalised maximum residue of -04 is considered as the convergence criteria. The software is thoroughly validated for nonreating flows as well as reacting flow with hydrogen and hydrocarbon fuels and the simulation results were published [13][14][15][16] .…”

Section: The Cfd Methodologymentioning

confidence: 99%

A Novel CFD Method to Estimate Heat Transfer Coefficient for High Speed Flows

et al. 2016

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Accurate prediction of surface temperature of high speed aerospace vehicle is very necessary for the selection of material and determination of wall thickness. For aerothermal characterisation of any high speed vehicle in its full trajectory, it requires number of detailed computational fluid dynamics (CFD) calculations with different isothermal calculations. From the detailed CFD calculations for different flow conditions and geometries, it is observed that heat transfer coefficients scale with the difference of adiabatic wall temperature and skin temperature. A simple 'isothermal method', is proposed to calculate heat flux data with only two CFD simulations one on adiabatic condition and other on isothermal condition. The proposed methodology is validated for number of high speed test cases involving external aerodynamic heating as well as high speed combusting flow. The computed heat fluxes and surface temperatures matches well with experimental and flight measured values.

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“…To find out the accuracy and the range of applications, the software has been validated for various complex aerospace problems including supersonic base flow [23], free stream and rocket exhaust interaction [31], transverse sonic injection in supersonic stream [32], supersonic jet impingement problem in an inclined plate [33], missile movement in canister [34] etc. and obtained very good match with experimental and flight measured values.…”

Section: K-ε Turbulence Modelmentioning

confidence: 99%

Numerical Exploration of Low Altitude Rocket Plume in Aircraft Vicinity

Dharavath,

Manna,

Chakraborty

2023

joast

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Low altitude plume of a solid rocket motor is numerically explored. The effects of free stream Mach number, altitude and presence of launch platform wing on plume shape are studied. Three-dimensional Reynolds Averaged Navier-Stokes (RANS) equations along with k-ε turbulence model and species transport equations are solved using commercial CFD software CFX-11. Thermochemical parameters (Mach number, pressure, temperature and propellant hot gas mass fraction) are analysed to characterize the plume. Mixing layer boundaries, its thickness and the attainment of self-similarity are evaluated to study the plume structure. With the increase of free stream Mach number, the computed plume diameter reduces. Centerline pressure, temperature and radial expansion of the plumes increases with the increase in altitude. Plume is found to be elongated and narrowed with relatively warm core region due to the presence of platform wing.

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Numerical Simulation of Supersonic Jet Impingement on Inclined Plate

Cited by 15 publications

References 18 publications

Analysis Methods for High Energy Line Break Jet Flows in Nuclear Power Plants

Analysis Methods for High Energy Line Break Jet Flows in Nuclear Power Plants

A Novel CFD Method to Estimate Heat Transfer Coefficient for High Speed Flows

Numerical Exploration of Low Altitude Rocket Plume in Aircraft Vicinity

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