Pressure-Pulse Propagation in Two-Phase One- And Two-Component Mixtures.

Abstract

One-dimensional Model of Wave Propagation 18 2. Comparison of Homogeneous Frozen and Homogeneous Equilibrium Model with Data of Ref. 11 for Pressure-pulse Propagation in Steam-Water Mixtures 26 3. Comparison of Homogeneous Frozen and Homogeneous Equilibrium Model with Data of Ref. 12 for Pressure-pulss Propagation in Steam-Water Mixtures 27 4. Illustration of Simple Separated-flow Regimes. 34 5. Illustration of (a) Possible Nonuniform Propagation and (b) Resulting Wave Form for a Simple Stratified Media ...... 34 6. Approximate Wave Form Employed to Describe Momentum Transfer in Wavy Annular Flow 37 7. Gas and Liquid Elements in (a) a Slug-flow Pattern and (b) Idealized Slug-flow Model. 42 8. Pressure Response of Gas Element in Slug Flow to Step Change Ahead of Liquid Element 45 9. Experimental Facility 49 10. Mixer Section for Experimental Facility 50 11. Test Section for Experimental Facility 51 12. Photo of Transducer, Oscilloscope, and Charge Amplifier ... 53 l.'j. Sample Oscilloscope Traces for Steaa-Water Compression and Rarefaction Pulses. 54 14. Correlation of Air-Water Data at Various Pressures ..... 55 15. Comparison of the Proposed Correlation and the Steam-Water Data 56 16. Comparison of the Frontal Velocities for Compression and Rarefaction Waves in Steam-Water Mixtures .57 17. Comparison of the Proposed Correlation and the Homogeneous Models with the Air-Water Data of Refs. 13 and 33 58 16. Comparison of the Homogeneous Adiabatic Model and Eq. 82 with the Steam-Water Data of Karplus 58 19. Comparison of the Homogeneous Adiabatic Model and Eq. 82 with the Steam-Water and Air-Water Data of Semenov and Kosterln 59 20. Comparison of the Homogeneous Models and Eq. 82 with the Weak-shock-wave Air-Water Data of Hamilton 21. Comparison of the Measurement Technique Used in This Study and that Employed by Hamilton 60 22. Comparison of Eq. 82 and the Steam-Water Data of Dejong and Firey • 62 23. Comparison of the Homogeneous Models and the Proposed Correlation with the Air-Water Velocity of Sound Data of Karplus ... ......... 24. Frequency Dependence of Velocity of Sound » 25. Comparison of the Smooth-interface Model with the Stratified Air-Water Data 26. Comparison of the Smooth-interface Model with the Stratified Steam-Water Data 27. Comparison of the Two-component Models with the Experimental Data of Refs. 7 and 9 65 28. Comparison of the Proposed Models with Air-Water Data of Garrard for (a) Void Fractions Determined from Film Thickness Measurements, (b) Calculated Void Fractions, and (c) Calculated Core Void Fractions 66 29. Comparison of the Proposed One-component Models with the Steam-Water Data of White and D'Arcy 67 30. Compression and Rarefaction Wave Data for (a) Air at 60°F and (b) a 50% Quality Steam-Water Mixture as Reported in Ref. 14 68 31. Comparison of the One-component Models with the Rarefaction Wave Data of England et_ al 68 32. Comparison of the One-component Models with the Rarefaction Wave Data of Collinghara e£ al. as a Function of Gross and Core Qualities 69 33.

Performance Predictions of Dry and Wet Vapors Ejectors Over Entire Operational Range

“…They also conducted comparisons with several available methods on two-phase speed of sound and found that Wood's equation [23] provided relatively good predictions. Tao et al [24] also found that Wood's equation agrees well with experimental data [25]. Here the Wood's equation is introduced in our models which is…”

Effect of Interfacial Pressure Jump and Virtual Mass Terms on Sound Wave Propagation in the Two-Phase Flow

“…The speed of sound in the two-phase mixture is shown in Figure 2 along with the experimental data given by Henry et al [21]. The present result agrees well with the experimental data up to the void fraction 0)22.…”

Assessment of the FBR Core Disruptive Accident (CDA): The Role and Application of General Behavior Principles (GBPs).

“…where ρ TP (kg·m −3 ) is the two-phase density, c TP (m·s −1 ) is the two-phase propagation velocity which for the vapor continuous regime can be approximated by the sound speed in the gas component of the two-phase mixture, c g 35,36) and u d (m·s −1 ) is the liquid droplet velocity as a result of the pressure disturbance ∆P.…”

“…where u c (m·s −1 ) is the resulting continuous liquid velocity, and for the continuous liquid regime c TP is given by 35,36) …”