Conjugate Conduction-Convection Heat Transfer for Water-Cooled High-Speed Flows

Engblom, William; Fletcher, B; Georgiadis, Nicholas J.

doi:10.2514/6.2008-4653

Cited by 5 publications

(3 citation statements)

References 1 publication

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“…It is possible to compare the simulation results calculated in the present study against those found by several authors that used the same experimental data and conclude that the results have excellent compliance. Simulations of the Cases I, III and IV presented deviations respectively of 5.0%, −2.1% and −5.0%, and the Case II presented deviation of 7.3%, all of them corresponding to a difference from the experimental data by at most 1.1 K. According to Shope (6) , the nozzle for Case II has failed before the test reached the steady state, in which case the measured Table 5 Globally scaled residuals of each tested mesh for Case I (7) -model 2 − 7.9 − 6.0 − 12.2 − 17.0 Engblom et al (7) -model 3 12.9 18.7 5.3 2.0 Engblom et al (7) -model 4 1.4 8.7 − 9.0 − 11.5 Engblom et al (8) − 5.8 water temperature rise would be greater if the nozzle had survived, consequently reducing the deviation. Figure 7 shows temperature and heat flux distributions along the gas-side nozzle wall provided by different authors in comparison with those obtained in present study.…”

Section: Results and Analysismentioning

confidence: 99%

“…Engblom et al (8) reported serious numerical instabilities when computing the sensible heat flux due to the discontinuity in enthalpy as a function of temperature. They solved the problem using a third order polynomial to fit this property, starting at the saturation condition, preserving the original values and slopes at end point set as the saturation temperature plus 100°K.…”

Section: Materials Propertiesmentioning

confidence: 99%

“…Engblom et al (8) extended their studies, combining the mentioned 3D solvers Wind-US/FOGO with a new 2D, two-phase, axisymmetric, cell-centered, structured-grid, RANS pressure-based, SIMPLE scheme solver named COOL. The coupled Wind-US/FOGO/COOL package is successfully validated against existing data.…”

Section: Introductionmentioning

confidence: 99%

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Unified approach for conjugate heat-transfer analysis of high speed air flow through a water-cooled nozzle

2016

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This article presents a unified approach to solve steady-state conjugate heat-transfer problem including simultaneously gas, liquid and solid regions in just one 3D domain, distinguished by their particular properties. This approach reduces approximation errors and the time to solve the problem, which characterise iterative methods based on separated domains. The formulation employs RANS equations, realisable k-ε turbulence model and near-wall treatment model. A commercial CFD code solves the pressure-based segregated algorithm combined with spatial discretisation of second order upwind. The problem consists of a convergent-divergent metallic nozzle that contains cooling channels divided in two segments along the wall. The nozzle wall insulates the high-speed hot air flow, dealt as perfect gas, from the two low-speed cold water flows, dealt as compressed liquid, both influenced by transport properties dependent of the local temperature. The verification process uses three meshes with increasing resolutions to demonstrate the independence of the results. The validation process compares the simulation results with experimental data obtained in high-enthalpy wind tunnel, demonstrating good compliance between them. Results for the bulk temperature rise of the water in the second cooling segment of the nozzle showed good agreement with available experimental data. Numerical simulations also provided wall temperature and heat flux for the gas and liquid sides. Besides, distribution of temperature, pressure, density and Mach number were plotted along the nozzle centerline showing a little disturbance downstream the throat. This phenomenon has been better visualised by means of 2D maps of those variables. The analysis of results indicates that the unified approach herein presented can make easier the task of simulating the conjugate convection-conduction heat-transfer in a class of problems related to regeneratively cooled thrust chambers.

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Section: Results and Analysismentioning

confidence: 99%

Section: Materials Propertiesmentioning

confidence: 99%

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Unified approach for conjugate heat-transfer analysis of high speed air flow through a water-cooled nozzle

2016

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Conjugate heat transfer analysis in high speed flows

Murty

Manna

Chakraborty

2013

Proceedings of the Institution of Mechanical Engineers, Part G:

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Conjugate heat transfer studies are presented for high speed aerospace vehicle using commercial CFD software. Navier Stokes equations in the fluid domain and transient heat conduction equations in the solid domain are solved simultaneously to obtain the skin temperature history and other flow parameters. The computational methodology is applied to predict the surface temperature of high speed aerospace vehicle after validating the methodology against experimental results. Validation cases include laminar flow past axisymmetric double cone at Mach 4.57 and turbulent flow past circular cylinder at Mach 6.7. Computed flow field including cold wall heat flux, surface temperature distribution, surface temperature history match nicely with experimental as well as other numerical results. Temperature dependent material properties are found to have significant effect on the surface temperature prediction. Computed surface temperature of a high speed aerospace vehicle show good overall match with flight measured values.

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Numerical Simulation of Liquid Rocket Engine Thrust Chamber Regenerative Cooling

Kang

Sun

2011

Journal of Thermophysics and Heat Transfer

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Conjugate Conduction-Convection Heat Transfer for Water-Cooled High-Speed Flows

Cited by 5 publications

References 1 publication

Unified approach for conjugate heat-transfer analysis of high speed air flow through a water-cooled nozzle

Unified approach for conjugate heat-transfer analysis of high speed air flow through a water-cooled nozzle

Conjugate heat transfer analysis in high speed flows

Numerical Simulation of Liquid Rocket Engine Thrust Chamber Regenerative Cooling

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