Heat Exchange and Pressure Drop Enhanced by Sloshing

Pressure drops in the non-isothermal sloshing of liquid nitrogen and liquid hydrogen were experimentally investigated. Heat and mass transfer indicated by the pressure change induced by violent sloshing in the cryostat driven by the mechanical exciter were successfully obtained. Based on the visualized image of liquid motion, it was found that splash and wavy surface induced by violent sloshing of liquid should enhance heat transfer around liquid surface and result in pressure drop. It was also suggested that the instability of singlecomponent system with different temperature between the gaseous and liquid phase could make the pressure control more difficult. Nomenclature  : density [ kg/m 3 ] p : static pressure [ Pa ] T : static temperature [ K ] e : internal energy [ J/kg ] u  : velocity [ m/s ] g  : gravity acceleration [ m/s 2 ] q  : heat flux [ W/m 2 ] C p , C v : specific heat at constant p or  [ J/(kg･K) ]  : viscosity coefficient [ Pa･s ] k : thermal conductivity [W/(m 2 ･K) ]  : surface tension [ N/m ] D : diameter of vessel [ m ] t : time [ sec ]

show abstract

“…The outlines of the experiments were also reported briefly in AIAA 2011-5682 9) . Figure 7 to 12 show the experimental apparatus.…”

Section: Experimental Apparatusmentioning

confidence: 99%

“…In addition, related to the problem of pressure control, the liquid motion and pressure change of non-isothermal sloshing phenomena in a closed cylinder with silicone oil of ambient temperature, i.e. without phase change, were intensively visualized and discussed in AIAA 2011-5682 9) , as shown in Fig …”

Section: Introductionmentioning

confidence: 99%

Investigation on Pressure Change Induced by Cryogenic Sloshing

Himeno

Ishikawa

Umemura

et al. 2012

48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition, related to the problem of pressure control in lateral excitation, the liquid motion and pressure change of non-isothermal sloshing in a closed cylinder were intensively visualized with silicone oil of ambient temperature, i.e. without phase change in AIAA 2011-5682 9) . As shown in Fig.5, compared with the visualized motion of liquid, the enhancement of hear transfer coupled with the non-linier motion, such as the appearance of droplets and wavy surface, had different order of magnitude from those in the cases with linier response.…”

Section: Experiments On Non-isothermal Sloshing Induced By Lateramentioning

confidence: 99%

Experimental Investigation on Heat Exchange and Pressure Drop Enhanced by Vertical Sloshing

Himeno

Haba

Ishikawa

et al. 2013

49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

Self Cite

View full text Add to dashboard Cite

For the prediction of heat transfer coupled with sloshing in the propellant tanks of launch vehicle, the pressure drop induced by liquid motion in a sub-scale vessel excited in vertical direction was experimentally investigated. The strong correlation between the pressure drop and liquid motion was confirmed in the experiment. The mechanisms enhancing heat transfer were discussed based on the visualization. It was suggested that shear flow and vortices induced by violent motion of liquid should cause the pressure drop in the closed vessel.Nomenclature  : density [ kg/m 3 ] p : static pressure [ Pa ] T : static temperature [ K ] e : internal energy [ J/kg ] u  : velocity [ m/s ] q  : heat flux [ W/m 2 ] 2  : specific heat ratio C p /C v [ -]  : surface tension [ N/m ] D : diameter of vessel [ m ] H : initial liquid level [ m ]  : amplitude of oscillation [ m ] t : time [ sec ]

show abstract

“…The test tank used in the experiment for silicone oil sloshing has a cylindrical shape with 0.110 m inner diameter and 0.230 m height [1]. The tank, made of acrylic resin, is mounted on a slider to allow lateral movement.…”

Section: Experiemtnal Setupmentioning

confidence: 99%

“…The dynamics of the sloshing phenomenon has been extensively studied at NASA since the 1960's [11]. Recently, thermal de-stratification and pressure reduction from lateral sloshing has been investigated experimentally and numerically by Himeno et al [1,2], Lacapere et al [12], Agui and Moder [13]. While focusing on predicting the thermal de-stratification and pressure drop in the tank, these computational studies did not include an extensive analysis of the factors that can affect the modeling of the sloshing process.…”

Section: Introductionmentioning

confidence: 99%

Validation of a CFD Model Predicting the Effect of High Level Lateral Acceleration Sloshing on the Heat Transfer and Pressure Drop in a Small-Scale Tank in Normal Gravity

Kartuzova

Kassemi

2018

Volume 3: Fluid Machinery; Erosion, Slurry, Sedimentation; Experimental, Multiscale, and Numerical Methods for Multiphase Flows

View full text Add to dashboard Cite

A two-phase CFD model is developed to study the effects of sloshing with high level lateral acceleration on the heat transfer and pressure drop in a small scale tank. Computational results are compared to the data provided by a non-isothermal sloshing experiment without phase change conducted by T. Himeno et al. at the University of Tokyo and JAXA in 2011 [1]. The results of the current model are, also, compared to CFD predictions reported by Himeno et al. [2]. A step change in lateral acceleration was applied in the experiment. Different levels of lateral acceleration amplitude, varying between 0G and 0.5G, were considered. CFD results for interface movement and tank pressure are presented and compared in this paper to the experimental data for the case in which the value of lateral acceleration was set to 0.5G. The effects of initial and boundary conditions and turbulence modeling approach on the tank pressure change during sloshing are discussed in detail. The effect of conjugate heat transfer in the tank wall is also studied to show its important role in determining the tank pressure evolution. The results of the Reynolds Averaged Navier Stokes (RANS) models are compared to the results of the Large Eddy Simulation model (LES) to underscore the importance of correctly capturing the effects of turbulence for high fidelity predictions.

show abstract

Heat Exchange and Pressure Drop Enhanced by Sloshing

Cited by 17 publications

References 3 publications

Investigation on Pressure Change Induced by Cryogenic Sloshing

Investigation on Pressure Change Induced by Cryogenic Sloshing

Experimental Investigation on Heat Exchange and Pressure Drop Enhanced by Vertical Sloshing

Validation of a CFD Model Predicting the Effect of High Level Lateral Acceleration Sloshing on the Heat Transfer and Pressure Drop in a Small-Scale Tank in Normal Gravity

Contact Info

Product

Resources

About