Experimental and theoretical study on single-phase natural circulation flow and heat transfer under rolling motion condition

Tan, Sichao; Su, G.H.; Gao, Puzhen

doi:10.1016/j.applthermaleng.2009.04.019

Cited by 164 publications

(24 citation statements)

References 16 publications

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“…Ocean conditions could make the coolant flow of the system fluctuate and would influence the thermal hydraulic characteristics of the equipments and system (Ishida et al, 1990;Gao et al, 1999;Ishida and Yoritsune, 2002;Murata et al, 2002). Experiments and theoretical analyses both proved this point (Pang et al, 1995;Pendyala et al, 2008a;Pendyala et al, 2008b;Tan et al, 2009).…”

Section: Introductionmentioning

confidence: 85%

Pressure drop fluctuations in periodically fluctuating pipe flow

Gao

Liu

Yang

et al. 2010

J. Marine. Sci. Appl.

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Experiments were conducted to study characteristics of flow when flow is fluctuating. The experimental results showed a phase difference between the flow rate and the pressure drop fluctuations. This phase difference between the fluctuating flow rate and pressure drop was analyzed for laminar flow. Analysis showed that the phase difference changes with the period of the flow fluctuation, the pipe radius, the density and the dynamic viscosity of the liquid. Fluctuating pipe flow was then numerically simulated. Results of the numerical simulation were compared with theoretical values and experimental results. It was shown that, when the flow rate fluctuates with time as a sine wave, the pressure drop fluctuates with the same periodicity, and there is a phase difference between them.

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Section: Introductionmentioning

confidence: 85%

Pressure drop fluctuations in periodically fluctuating pipe flow

Gao

Liu

Yang

et al. 2010

J. Marine. Sci. Appl.

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“…The parameter, k, plays a role similar to the heat transfer coefficient, which represents the heatcarrying ability from a surface by convective heat transfer. The loop with the larger k value has a larger circulation flow rate under certain temperature differences; see Equation (7). It also carries more heat per unit mass flow rate.…”

Section: The Criterion For Natural Circulation Abilitymentioning

confidence: 99%

“…An increase in T results in a larger driving force and mass flow rate; see Equation (7). Also, more heat is carried by per unit mass flow rate, see Equation (1).…”

Section: The Criterion For Natural Circulation Abilitymentioning

confidence: 99%

“…Certain ship-mounted integrated-type nuclear power plants also use the natural circulation process for portable desalination [3,4]. However, the thermo-hydraulic characteristics of natural circulation in ship-mounted plants are far more complex than those of land-based plants due to the influence of ship motions such as heaving, rolling, and inclination [5][6][7][8][9] (Figure 1). In the event of incidents such as collision, sinking, or stranding, the reactor will work under inclined conditions.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical and experimental study on single-phase natural circulation under inclined conditions

Zhu

Yang

Gong

et al. 2013

Journal of Nuclear Science and Technology

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The natural circulation reactor is widely used in marine environments where thermo-hydraulic performance is heavily affected by the heaving, pitching, and inclining of a ship. This paper theoretically and experimentally investigated steady-state single-phase natural circulation under inclined conditions. Results showed that energy transported by natural circulation was proportional to 1.5 times the power of the temperature difference between the hot leg and the cold leg. Furthermore, a parameter, k, was presented that revealed the comprehensive influence of working fluid properties, resistance characteristics, gravity fields, and loop configurations. k was treated as the criterion for the circulation ability of a loop and it also acted as the basis for evaluating and optimizing different designs. Analysis under the guidance of k was confirmed by a series of experiments performed on a symmetrical two-circuit loop. Both theoretical and experimental results showed that the inclination restrained overall circulation due to the decrease in average altitude difference between the steam generators and the electric heater. The disparity in branch circulations increased with the increase in the inclined angle. A loop design consisting of a large altitude difference and a small width was preferable to confine the influence of inclination. However, if the loop width was too small, it caused a severe reduction in the circulation ability for large angle inclinations.

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“…In order to investigate the effects of rolling motion on the thermal-hydraulic characteristics of natural circulation, a series of single-phase natural circulation experimental tests under rolling motion condition are performed by Ishida and Yoritsune (2002), Murata et al (2002Murata et al ( , 2012, Tan et al (2009aTan et al ( ,b, 2013. The results of their experiments show that the additional inertial force caused by the rolling motion easily induces the fluctuations of natural circulation flow rate.…”

Section: Introductionmentioning

confidence: 99%