Simple functions for the fast approximation of light water thermodynamic properties

Garland, W.J.; Hand, B.J.

doi:10.1016/0029-5493(89)90293-8

Cited by 36 publications

(6 citation statements)

References 2 publications

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“…42. The contribution of the surface tension energy to the specific internal energy of the system e is negligible in comparison to the contribution of liquid and vapor specific internal energies, e l and e g , respectively.…”

Section: Mixturementioning

confidence: 94%

Stochastic-field cavitation model

2013

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Nonlinear phenomena can often be well described using probability density functions (pdf) and pdf transport models. Traditionally, the simulation of pdf transport requires Monte-Carlo codes based on Lagrangian “particles” or prescribed pdf assumptions including binning techniques. Recently, in the field of combustion, a novel formulation called the stochastic-field method solving pdf transport based on Eulerian fields has been proposed which eliminates the necessity to mix Eulerian and Lagrangian techniques or prescribed pdf assumptions. In the present work, for the first time the stochastic-field method is applied to multi-phase flow and, in particular, to cavitating flow. To validate the proposed stochastic-field cavitation model, two applications are considered. First, sheet cavitation is simulated in a Venturi-type nozzle. The second application is an innovative fluidic diode which exhibits coolant flashing. Agreement with experimental results is obtained for both applications with a fixed set of model constants. The stochastic-field cavitation model captures the wide range of pdf shapes present at different locations.

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Section: Mixturementioning

confidence: 94%

Stochastic-field cavitation model

2013

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“…The nonlinear model is simulated with a time step of 5 milliseconds using a first order Runge Kutta solver. Saturated/subcooled steam/water properties were computed using steam tables as per [16,17], and the values were generated according to the AHWR specific data as given in [4]. The reactor was initially simulated at full power operating conditions and a 10% step increase in steam offtake rate was simulated at 50 th second of operation.…”

Section: Steady State Valuesmentioning

confidence: 99%

Improved model of Advanced Heavy Water Reactor(AHWR)for Control studies

2018

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This paper presents a modified version of coupled neutronics - thermal hydraulics model of Advanced Heavy Water Reactor (AHWR) for control studies. Earlier reported models assume, for the sake of simplicity, that the steam drum level and pressure are being strictly regulated at their respective set points, thereby neglecting these dynamics. However, such models are not suitable for analysis / controller design for the normal mode (load following mode) of operation of AHWR wherein the demand power setpoint is adjusted with respect to fluctuations in steam pressure. The work reported in this paper bridges this gap by including the steam drum pressure and level dynamics in the model. This leads to a model suitable for investigating control related aspects of all operational modes of the reactor. Efficacy of the proposed model is demonstrated through nonlinear simulations.

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“…The maximum possible boron level in the coolant is not more than 2000 ppm (0.2%). Therefore, in the thermal hydraulic analysis, the coolant is considered as pure water and all thermodynamic properties of the coolant are evaluated from the well established empirical correlation used for pure water [8,9].…”

Section: Coolant Thermodynamic Propertiesmentioning

confidence: 99%