Impact of turbulence modelling on external supersonic flow field simulations in rocket aerodynamics

López, Deibi; Domínguez, Diego; Gonzalo, Jesús

doi:10.1080/10618562.2013.867951

Cited by 17 publications

(14 citation statements)

References 16 publications

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“…standard k À ε model) generally has difficulties to be able to predict the length of separation accurately. With the introduced compressibility modifications, the modified k À ε model preforms much better and even shows advantages to the k À u SST turbulence model which is widely used for separation flow predictions [37,38].…”

Section: Main Flowmentioning

confidence: 99%

Effects of self-throttling on combustion enhancement in supersonic flow with transverse injection

Han

Chen

2015

International Journal of Hydrogen Energy

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Section: Main Flowmentioning

confidence: 99%

Effects of self-throttling on combustion enhancement in supersonic flow with transverse injection

Han

Chen

2015

International Journal of Hydrogen Energy

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“…Based on this comparison and the grid independence study, the k-ω SST turbulence model was chosen for all subsequent simulations. This choice is also supported by the work of Medeiros et al (2012), López et al (2013) and Lee et al (2016), who concluded that the SST k – ω turbulence is the most suitable RANS model to simulate this type of flow.…”

Section: Problem Formulationmentioning

confidence: 88%

Numerical assessment of miniaturized cold spray nozzle for additive manufacturing

Nasif

Barron

Balachandar

et al. 2019

HFF

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Purpose Application of cold spray technology may exhibit significant benefits for the additive manufacturing process, particularly for producing intricate objects. To ascertain the feasibility of such an application, this paper aims to present a numerical investigation of the effect of scaling down a convergent-divergent (de Laval) nozzle, which is typically used in the cold spray industry, on the compressible flow parameters and thermal characteristics. Design/methodology/approach The Navier–Stokes equations and energy equation governing compressible flow are numerically solved using a finite volume method with a coupled solver. The conjugate heat transfer technique is used to couple fluid and solid heat transfer domains and predict the local heat transfer coefficient between the solid and fluid. The use of various RANS turbulence models has also been investigated to quantify the effect of the turbulence model on the simulation. Findings The numerical results reveal that the flow and thermal characteristics are altered as the convergent-divergent nozzle is scaled down. The static pressure and temperature profiles at any section in the nozzle are shifted toward higher values, while the Mach number profile at any section in the nozzle is shifted toward a lower Mach number. The turbulent kinetic energy at the nozzle exit increases with the scaling down of the nozzle geometry. This study also provides convincing evidence that the adiabatic approach is still suitable even though the temperature of the nozzle wall is extremely high, as required for industrial application. Results indicate that it is feasible to use the available capabilities of the cold spray technology for additive manufacturing after scaling down the nozzle. Originality/value The idea of adopting cold spray technology for additive manufacturing is new and innovative. To develop this idea into a viable commercial product, a thorough understanding of the flow physics within a cold spray nozzle is required. The simulation results discussed in this paper demonstrate the effect that scaling down of a convergent-divergent nozzle has on the flow characteristics in the nozzle.

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“…The design process of a rocket with experimental processes and measuring all the necessary variables in wind tunnels can be exhausting, time and money consuming for most researchers [9]. A reasonable prediction of these parameters with the utilization of appropriate approaches is offered by CFD simulations.…”

Section: Utilization Of Cfd For Aerodynamic Design Of a Rocketmentioning

confidence: 99%

Utilization of CFD for the Aerodynamic Analysis of a Subsonic Rocket

Aytaç

Aktas

2020

Politeknik Dergisi

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The design and analyses of a subsonic rocket was carried out with the utilization of CFD.  The effects of several critical parameters on the rocket performance were investigated.  An increment in Mach number at approximately 30% results in an increment of drag coefficient nearly 68%.  Changing the turbulence intensity does not make any significant difference on drag coefficient.  The drag coefficient obtained from k-ω is higher than that of obtained from k-ω SST.

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Impact of turbulence modelling on external supersonic flow field simulations in rocket aerodynamics

Cited by 17 publications

References 16 publications

Effects of self-throttling on combustion enhancement in supersonic flow with transverse injection

Effects of self-throttling on combustion enhancement in supersonic flow with transverse injection

Numerical assessment of miniaturized cold spray nozzle for additive manufacturing

Utilization of CFD for the Aerodynamic Analysis of a Subsonic Rocket

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