Influence of adverse accelerations on the operation of an ?Antigravity? heat pipe

Kiseev, V. M.; Belonogov, A. G.; Belyaev, A. A.

doi:10.1007/bf00871059

Cited by 9 publications

(3 citation statements)

References 2 publications

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“…Indeed it is expected that the occurrence of microgravity is beneficial when the device is working in the antigravity mode while it is not for the gravity assisted PHP. Kiseev et al [6] performed high-acceleration experiments on a 4.5m diameter centrifuge table with a nonlooped acetone (60% charge) device, consisting of 23 turns of 0.42m long, 1.1mm internal diameter (ID) stainless steel capillary. The evaporator and the adiabatic section were 120mm long, while the condenser section was 180mm long.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on a Closed Loop Pulsating Heat Pipe in Hyper-Gravity Conditions

Mameli

Manzoni

Araneo

et al. 2014

Proceedings of the 15th International Heat Transfer Conference

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A Closed Loop Pulsating Heat Pipe made of a copper tube (1.1mm/2mm I.D./O.D.) and filled with FC-72 has been tested on the Large Diameter Centrifuge (LDC) of the European Space Agency in Noordwijk at different hypergravity levels up to 20g, different heat input levels and different orientations with respect to the gravity direction (vertical bottom heated and horizontal position). Results shows that both in the horizontal and vertical orientation the device operation depends on the combined effect of gravity and heat input level. For the horizontal orientation, fluid stratification and the consequent thermal crisis occur at different acceleration levels depending also on the heat input power level and on the heating/gravity history. During the vertical operation the PHP thermal performance is slightly enhanced by the lower hyper-gravity levels (up to 3g at 50W, up to 4g at 70W and up to 6g at 100W) while two different local thermal crisis affect the PHP thermal behavior with the higher acceleration levels.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation on a Closed Loop Pulsating Heat Pipe in Hyper-Gravity Conditions

Mameli

Manzoni

Araneo

et al. 2014

Proceedings of the 15th International Heat Transfer Conference

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show abstract

“…In addition, there is an interplay between phase change phenomena, capillary forces and gravity which may help or damp the fluid motion. Experimental studies on PHPs operating under different acceleration loads [4][5][6][7][8][9][10][11] have underlined a strong relationship between these complex phenomena and the PHP thermal response. In the last two decades, many numerical works focused on the prediction of the actual PHP performance, but only few of them are capable of complete thermal-hydraulic simulations and even less are partially validated against experimental data ([12-13]).…”

Section: Introductionmentioning

confidence: 99%

Non equilibrium lumped parameter model for Pulsating Heat Pipes: validation in normal and hyper-gravity conditions

Manzoni

Mameli

Falco

et al. 2016

International Journal of Heat and Mass Transfer

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“…It was demonstrated that the internal diameter, vapor plug size, and unit cell numbers determine the oscillation and capillary force, gravitational force, initial pressure distribution of the working fluid significantly affect the frequency and amplitude of oscillating motion in the capillary tube. Kiseev and Zolkin (1999) experimentally investigated the effects of acceleration and vibration on the performance of the unlooped OHP and the results indicated that the OHP operates successfully by various acceleration effects. By increasing the acceleration from -6g to +12g the evaporator temperature was increased by 30%.…”

Section: Introductionmentioning

confidence: 99%

Effects of Capillary and Gravitational Forces on Performance of an Oscillating Heat Pipe

Zhang

Shao

2011

Frontiers in Heat Pipes

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An advanced mathematical model of flow and heat transfer in an oscillating heat pipe (OHP) is proposed. The capillary and gravitational forces are included in the momentum equation of the liquid slug. Detailed numerical simulation is carried out to investigate the surface tension and gravity effects on the oscillatory flow and heat transfer in an OHP with different inner diameters and orientations. The results show that gravity effect hinders the performance of top heat mode OHP while aids the operation of bottom heat mode OHP. Comparisons between the cases with surface tension and without surface tension indicate that the effects of surface tension on the performance of OHP are negligible even for small inner diameter. The effect of inclination angle on the performance of OHP is investigated.

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Influence of adverse accelerations on the operation of an ?Antigravity? heat pipe

Cited by 9 publications

References 2 publications

Experimental Investigation on a Closed Loop Pulsating Heat Pipe in Hyper-Gravity Conditions

Experimental Investigation on a Closed Loop Pulsating Heat Pipe in Hyper-Gravity Conditions

Non equilibrium lumped parameter model for Pulsating Heat Pipes: validation in normal and hyper-gravity conditions

Effects of Capillary and Gravitational Forces on Performance of an Oscillating Heat Pipe

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