An experimental study and prediction of a two-phase pressure drop inmicrogravity

Chen, I. Y.; Downing, R.; Keshock, E. G.; Al-Sharif, Majid M.

doi:10.2514/6.1989-74

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…Equation 18represents the present asymptotic model. It can be seen that the present model with fitting parameter p = 1/4 represents the Chen et al (1989) data in a successful manner. The RMS error is equal to 24.40%.…”

Section: Figmentioning

confidence: 66%

“…If the lower point of ϕ g at X = 1.23 is excluded, the RMS error will be equal to 17.78% instead of 24.40%. A comparison of the Lockhart and Martinelli (1949) model using the classical Chisholm (1967) relationship (C = 20) with experimental data of Chen et al (1989) is also shown in Fig. 4.…”

Section: Figmentioning

confidence: 94%

“…1-3, it is clear that the experimental points set in the form of ϕ l → ∞ as X → 0 and ϕ l → 1 as X → ∞ are in line with the expected asymptotic behavior of the Lockhart and Martinelli (1949) correlation. Figure 4 shows ϕ g versus the Lockhart-Martinelli parameter (X) for the Chen et al (1989) data for two-phase turbulent/turbulent horizontal flow at microgravity conditions using R114 in a 15.8 mm inside diameter tube in the annular regime. Equation 18represents the present asymptotic model.…”

Section: Figmentioning

confidence: 99%

“…Figure 6 shows ϕ l versus the Lockhart-Martinelli parameter (X) for all data sets shown in Figs. 1-5 (Zhao and Rezkallah, 1993;Fujii et al, 1998;Ohta et al, 2000;Chen et al, 1989;Wheeler, 1992). The data in Figs.…”

Section: Figmentioning

confidence: 99%

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Review and Modeling of Two-Phase Frictional Pressure Gradient at Microgravity Conditions

Awad

Muzychka

2010

ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C

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First, a detailed review of two-phase frictional pressure gradient at microgravity conditions is presented. Then, a simple semi-theoretical method for calculating two-phase frictional pressure gradient at microgravity conditions using asymptotic analysis is presented. Two-phase frictional pressure gradient is expressed in terms of the asymptotic single-phase frictional pressure gradients for liquid and gas flowing alone. In the present model, the two-phase frictional pressure gradient for x ≅ 0 is nearly identical to single-phase liquid frictional pressure gradient. Also, the two-phase frictional pressure gradient for x ≅ 1 is nearly identical to single-phase gas frictional pressure gradient. The proposed model can be transformed into either a two-phase frictional multiplier for liquid flowing alone (φl2) or two-phase frictional multiplier for gas flowing alone (φg2) as a function of the Lockhart-Martinelli parameter, X. Comparison of the asymptotic model with experimental data at microgravity conditions is presented.

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Section: Figmentioning

confidence: 66%

Section: Figmentioning

confidence: 94%

Section: Figmentioning

confidence: 99%