SFRJ simulator results - Experiment and analysis in cold flow

Richardson, J.; Degroot, W.; Jagoda, J.; Walterick, R. E.; Hubbartt, J.; Strahle, Warren C.

doi:10.2514/6.1985-329

Cited by 2 publications

(2 citation statements)

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“…Figure 4 shows the development of the normalized turbulence kinetic energy in the streamwise direction. The results are almost identical to the numerical results of Richardson, 23 which were verified by Richardson et al 18 and de Groot. 27 The reattachment lengths quoted in column 1 of Table 2 are also from Ref.…”

Section: Resultssupporting

confidence: 91%

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Prediction of turbulent combustion flowfields behind a backward-facing step

Tsau

Strahle

1990

Journal of Propulsion and Power

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Turbulent combustion flowfields behind a backward-facing step are examined by using different boundary conditions and various computational assumptions. The effect of combustion on the flow is also studied. Hydrogen and methane are the two gaseous fuels chosen for this investigation. Both a conventional law of the wall method and a recently developed low Reynolds number model are tested. Two types of statistical models are employed in the combustion simulations to take into account species fluctuations. The results are primarily fourfold: 1) The fluctuation of the fuel mass fraction is insignificant for the Reynolds number examined in this paper; 2) different statistical models produce almost identical results; 3) the law of the wall model predicts a shorter reattachment length than the low Reynolds number model does; and 4) the effect of combustion is to shorten the reattachment length of the flow field, and the reattachment length is more a function of the amount of heat input to the system than a function of the type of fuel or a function of the injection rate in a reactive flow system.Xj x y e 17 ri " K //, v p a r Nomenclature statistical mean Favre covariance of the mixture fraction specific turbulence kinetic energy, m 2 /s 2 probability density function pressure, N/m 2 residual source term in an equation temperature, K streamwise velocity, m/s Cartesian velocity component, m/s Favre fluctuation of velocity component I//, m/s transverse velocity, m/s Cartesian coordinate, m streamwise coordinate, m transverse coordinate, m turbulence dissipation rate, m 2 /s 3 mixture fraction Favre fluctuation of mixture fraction von Karman constant laminar viscosity, kg/m • s eddy viscosity, kg/m • s M + A*r kinematic viscosity, m 2 /s density, kg/m 3 statistical variance stress, kg/m • s 2 any dependent variable Subscripts I = quantities inside the viscous sublayer v = quantities at the edge of the viscous sublayer 0 = wall values 1 = first grid point outside the viscous sublayer or off the wall Received

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Section: Resultssupporting

confidence: 91%

“…This configuration models an experimental apparatus of the combustion laboratory at Georgia Institute of Technology. 18 The turbulent flowfield is assumed to be stationary and adiabatic. The chemical reaction rates are assumed to be infinitely fast so that the mixture is in chemical equilibrium everywhere inside the chamber.…”

Section: Theoretical Developmentmentioning

confidence: 99%