Assessing the effect of flashing on steady state behavior and Ledinegg instability of a two phase rectangular natural circulation loop

Dewangan, Kush Kumar; Das, Prasanta Kumar

doi:10.1016/j.ijheatmasstransfer.2017.08.119

Cited by 7 publications

(2 citation statements)

References 36 publications

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“…So, the consideration of spatial variation on thermophysical properties in solving the governing equations gives good approximations to experimental results. 25…”

Section: Introductionmentioning

confidence: 99%

“…So, the consideration of spatial variation on thermophysical properties in solving the governing equations gives good approximations to experimental results. 25 Several studies addressed the thermo-hydraulic behaviour of NCLs operated above atmospheric pressure. At higher pressures, the latent heat of vaporization is less and the loop fluid quickly reaches dry-out condition even at low heat fluxes.…”

Section: Introductionmentioning

confidence: 99%

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Two-phase natural circulation loop behaviour at atmospheric and subatmospheric conditions

Sudheer

Kumar

Balasubramanian

2018

Proceedings of the Institution of Mechanical Engineers, Part E:

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This paper aims to present the steady-state behaviour of two-phase natural circulation loop at atmospheric and sub-atmospheric conditions. One-dimensional numerical approach is adopted to evaluate various system parameters, with special emphasis on spatial variation of thermo-physical properties and flashing. Homogeneous equilibrium model is applied for two-phase flows. An in-house code is developed in MATLAB to solve numerical model iteratively. It is observed that consideration of spatial variation of thermo-physical properties can precisely predict the loop behaviour. The evaluated results are validated with the open literature and reasonably good agreement is observed. The heater inlet temperature, inlet pressure and heat flux are found to have significant influence on spatial variation of pressure, temperature and enthalpy. As system pressure decreases from atmospheric to sub-atmospheric (1–0.8 atm), it is observed that the sub-atmospheric loop gives a higher mass flow rate compared to atmospheric loop at lower heat fluxes. However, as the heat flux increases in the sub-atmospheric loop, the mass flow rate is reduced due to increased drag force in the loop.

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“…So, the consideration of spatial variation on thermophysical properties in solving the governing equations gives good approximations to experimental results. 25…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%