Study On a Gas-Liquid Two-Phase Flow in Helically Coiled Tubes

Akagawa, Koji; Sakaguchi, Tadashi; Ueda, Minoru

doi:10.1299/jsme1958.14.564

Cited by 51 publications

(26 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…-The liquid phase friction factor can be considered directly proportional to the conventional friction factors defined as (Gupta and Mishra, 1979): where the critical Reynolds number at which transition from laminar to turbulent flow occurs is (Ito, 1959 (1966), Akagawa et al (1971), Mujawar and Rao (1981) and Rangacharuylu and Davis (1984). The required single phase pressure drops in these correlations were calculated using friction factors given by Equations (28) and (29).…”

Section: Fr In Equationsmentioning

confidence: 99%

“…They observed similar flow patterns as obtained in the case of two phase flow in straight horizontal tubes, but smaller liquid hold-up and higher pressure drop was found. Other important studies on two phase flow in helical coils (Banerjee et al, 1969;Akagawa et al, 1971;Mujawar and Ra,ja Rao. 198 1 ;Rangacharylu and Davis, 1984;Hart et al, 1988) have, in general.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Flow regimes, hold–up and pressure drop for two phase flowin helical coils

et al. 1990

View full text Add to dashboard Cite

Experimental results on flow pattern, hold-up and pressure drop are presented for cocurrent upward and downward air water flow in helical coils. A tube of 0.01 m internal diameter was used and the ratio of coil to tube diameter was varied from 1 1 to 156.5. Water flow rate was varied from 4.9 X m'/s while the range of gas tlow rate covered was 83 X lo-' m3/s to 610 X lo-' m'/s. A new mechanistic approach is proposed to correlate pressure drop data in coils. The proposed model retains the identity of each phase and separately accounts for the effects of curvature and tube inclination resulting from the torsion of the tube. This makes it possible to use a single model to predict pressure drop for both upward and downward twophase flow in coiled tubes. Required correlations for hold-up, interfacial friction factor and friction factors for individual phases are provided. m3/s to 92 X On presente des resultats expkrimentaux sur le diagramme d'koulement. la retention et la perte de charge pour un ecoulement air eau a cocourant ascendant et descendant dans des serpentins hklicoidaux. Un tube de 0,01 m de diamktre interne a CtC utilisC et on a fait varier le rapport entre le serpentin et le diambtre du tube entre 1 1 et 156,5. On a fait varier le debit d'eau de 4,9 X m3/s B 92 x 10 -6 m'/s B tandis que la gamme du dCbit du gaz CtudiCe variait de 83 X m'/s a 610 x m3/s. On propose une nouvelle approche mecanistique pour corriler les donnCes de perte de charge dans les serpentins. Le niodkle propost identifie chaque phase et tient compte skparemment des effets de la courbure et de I'inclinaison du tube dues a la torsion du tube. II est ainsi possible d'utiliser un modkle simple pour pridire la perte de charge B la fois pour I'koulement diphasique ascendant et descendant dans les tubes en spirales. On prCsente les corrClations requises pour la retention, le facteur de friction interfaciale et les facteurs de friction pour chaque phase.

show abstract

Section: Fr In Equationsmentioning

confidence: 99%

mentioning

confidence: 99%

Flow regimes, hold–up and pressure drop for two phase flowin helical coils

et al. 1990

View full text Add to dashboard Cite

show abstract

“…Despite varying applications, the literature on two-phase fl ow through helical coiled tubes is rather scanty. Ripple et al (1966), Banerjee et al (1969), Akagawa et al (1971), Kasturi and Stepanek (1972a, b), Mujawar and Rao…”

Section: Introductionmentioning

confidence: 98%

Frictional Pressure Drop of Air Non‐Newtonian Liquid Flow through Helical Coils in Horizontal Orientation

Biswas

Das

2007

Can J Chem Eng

View full text Add to dashboard Cite

On a effectué des recherches afi n d'évaluer la perte de charge frictionnelle diphasique pour un écoulement liquide non newtonien d'air dans des serpentins hélicoïdaux orientés horizontalement. Les expériences ont été menées avec trente-six serpentins hélicoïdaux différents et quatre concentrations différentes de sel de sodium de carboxyméthylcellulose (SCMC) comme liquides non newtonien. Les effets du débit d'air et de liquide, du diamètre de serpentin, de l'angle d'hélice et des propriétés de liquide sur la perte de charge frictionnelle diphasique ont été examinés. Une tentative a été faite pour caler les données expérimentales de la perte de charge de pression frictionnelle diphasique par la corrélation de Lockhart et Martinelli (Chemical Engineering Progress, 45, 39-48 (1949) et la corrélation de Lockhart-Martinelli modifi ée telles qu'elles sont présentées par différents auteurs. Par ailleurs, la méthode du facteur de friction a été adoptée pour corréler les données expérimentales par l'analyse dimensionnelle. La corrélation développée prédit la perte de charge frictionnelle diphasique avec une précision statistique acceptable.

show abstract

“…Experimental studies indicate that the two-phase frictional pressure drop/holdup can be predicted using the correlations for a straight pipe provided by Lockhart-Martinelli (1949) or modified Lockhart-Martinelli parameter/developed empirical correlation. Ripple et al (1966), Owhadi et al (1968), Banerjee et al (1969), Boyce et al (1969), Akagawa et al (1971), Kasturi and Stepanek (1972a and b), Chen and Zhou (1981), Chen and Zhang (1984), Rangacharyulu and Davis (1984), Hart et al (1988), Sexena et al (1990) and Xin et al (1996) studied the hydrodynamics of gas-liquid flow through helical coils in vertical orientation. Awwad et al (1995a) measured the two-phase pressure drop and the holdup for air-water system in 32 different horizontal helical coils.…”

mentioning

confidence: 99%

Gas—Liquid Flow Through Helical Coils in Horizontal Orientation

Mandal

Das

2002

Can J Chem Eng

View full text Add to dashboard Cite

Experimental investigations have been carried out to evaluate the two‐phase pressure drop and the holdup for gas‐Newtonian liquid flow through helical coils. 24 helical coils and three different liquids were used for the experiments. Empirical correlations have been developed to predict the two‐phase friction factor and the liquid holdup as functions of various physical and dynamic variables of the system. Statistical analysis of the correlations suggests that they are of acceptable accuracy.

show abstract

Study On a Gas-Liquid Two-Phase Flow in Helically Coiled Tubes

Cited by 51 publications

References 0 publications

Flow regimes, hold–up and pressure drop for two phase flowin helical coils

Flow regimes, hold–up and pressure drop for two phase flowin helical coils

Frictional Pressure Drop of Air Non‐Newtonian Liquid Flow through Helical Coils in Horizontal Orientation

Gas—Liquid Flow Through Helical Coils in Horizontal Orientation

Contact Info

Product

Resources

About