phase flow through hydraulic machinery

Ngày tải lên: 14/03/2014, 19:33

... This is due the flow assumptions, the dispersion and hydrodynamic effects would predict SEM pattern, i.e., Au particles decrease as the flow time in the flow cell increases at a flow rate 0.5 mL·min−1 ... potential E2(ox)= +2.0 V, flow rate, 0.5 mL·min−1 3.3 Stability of Flow Cell-Voltammetric Sensor The operational stability of the sensors was studied by continuous exposure to the flow stream Figure ... dependent on the mobile phase flow- rate and varies from 0.2–0.6 mL·min−1 (Table 2) Table Dependences of retention time and peak height of cysteine (2.5 mg·L−1) on the flow rate (mL·min−1) at...

Ngày tải lên: 21/03/2014, 12:18

... T WO -PHASE FLOW 119 3.1 Introduction 119 3.2 Flow Patterns in Adiabatic and Diabatic Flows 120 2.5 3.2.1 Flow Patterns in Adiabatic Flow 120 3.2.2 Flow Pattern Transitions in Adiabatic Flow 128 ... Steady Two -Phase Flow Pressure Drop in Transient Flow 209 Pressure Drop in Flow Restriction 21 3.5.5.1 21 3.5.5.2 3.6 Steady-State, Two -Phase- Flow Pressure Drop Transient Two -Phase- Flow Pressure ... Stratified Flow (Horizontal Pipes) 82 3.4.8 Models for Transient Two -Phase Flow 83 3.4.8.1 85 3.4.8.2 Transient Slug Flow 86 3.4.8.3 3.5 Transient Two -Phase Flow in Horizontal Pipes Transient Two-Phase...

Ngày tải lên: 02/04/2014, 15:22

... Two -Phase Flow Y.L Wu 3.1 Basic Equations of Liquid-Solid Two -Phase Flow through Hydraulic Machinery 3.1.1 Introduction 3.1.2 General Concepts of Multiphase Flow 3.1.3 Basic Equations of Multiphase ... (Vforrosion of Hydraulic Machinery HYDRAULIC MACHINERY BOOK SERIES - - Hydraulic Design of Hydraulic Machinery Editor: Prof H Radha Krishna Mechanical Design and Manufacturing of Hydraulic Machinery ... Two -Phase Flow 3.2.3 The k-s-kp Turbulence Model of Two -Phase Flow 3.2.4 Lagrangian-Eulerian Model for Liquid-Particle Two -Phase Flow 3.3 Numerical Simulation of Liquid-Particle Two -Phase Flow through...

Ngày tải lên: 02/04/2014, 15:46

... pulses with energies up to 200 µJ at a repetition rate of kHz The pump pulse was shaped through amplitude and phase modulation using a double 128-pixel liquid crystal spatial light modulator [14] ... coherent phonons on materials phase change From a phenomenological point of view, amplifying phonon oscillations decreases the stability of the lattice and assists phase change Results shown in ... synthesize two-pulse and four-pulse pulse trains Our objective is to control material’s damage through resonantly enhancing or suppressing coherent phonon oscillations The effect of coherent...

Ngày tải lên: 06/05/2014, 08:53

... electromagnetic radiation and convection The Two Phase Flow, Phase Change and Numerical Modeling proposed method solves simultaneously the heat equation for the three phases (solid, liquid and vapor), computing ... state of the material in D pattern: (7) Two Phase Flow, Phase Change and Numerical Modeling T ( M, t o ) = To (M) , M ∈ D (8) In time, successions the phases the object suffers while irradiate ... between the boundaries C l (t) and C v (t) The power flow on the processed surface corresponding to the liquid state is given by: Two Phase Flow, Phase Change and Numerical Modeling r A ⋅ P −...

Ngày tải lên: 19/06/2014, 12:20

... Internal heat transfer of phase changing refrigerant is high and varies 28 Two Phase Flow, Phase Change and Numerical Modeling with flow regimes occurring along the tube passes Flow on the secondary ... heat transfer area (14) 36 Two Phase Flow, Phase Change and Numerical Modeling Amin: minimum free flow area through which air passes across the coil β: ratio of free -flow to frontal area The air ... return bends: ou = ( Pr )in − ( ΔPr ) l (2a) 34 Two Phase Flow, Phase Change and Numerical Modeling (P ) r ou = ( Pr )in − ( ΔPr )b (2b) For single phase, subcooled liquid and superheated vapour,...

Ngày tải lên: 19/06/2014, 12:20

... mainly due to the effect of water flow rate, while the shell-side heat transfer coefficient is 76 Two Phase Flow, Phase Change and Numerical Modeling influenced by the flow characteristic of refrigerant ... of heat exchangers are many, including flow arrangement, tube size, geometric configuration, and inlet/outlet conditions on the water 62 Two Phase Flow, Phase Change and Numerical Modeling and ... copper tubes The evaporator is a cross flow air-to-refrigerant heat exchanger of finned-tube type The throttling device is a thermostatic 64 Two Phase Flow, Phase Change and Numerical Modeling expansion...

Ngày tải lên: 19/06/2014, 12:20

... The results showed different type of flow patterns, as Couette-Taylor flow or single and double vortex flow, can be created in a wide 92 Two Phase Flow, Phase Change and Numerical Modeling range ... Fig Flow filed of single-vortex Flow VΘ /(2 R T0 )1/2 = 0.81 VΘ /(2 R T0 )1/2 =-0.237 Fig Flow filed of double-vortex Flow VΘ /(2 R T0 )1/2 = 0.81 VΘ /(2 R T0 )1/2 =-0.27 Figure shows the flow ... DSMC Method Fig Flow filed of single-vortex Flow when teperature of the inlet cylinder and the teperature of oulet cylinder are 300 and 350 K Fig Flow filed of single-vortex Flow when teperature...

Ngày tải lên: 19/06/2014, 12:20

... 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 z (m) Fig 19 The vapor phase velocity distribution 116 Two Phase Flow, Phase Change and Numerical Modeling The variations of the wall temperature ... critical strain (as measured on the RHS axis and illustrated by straight line 4) throughout the caster 138 Two Phase Flow, Phase Change and Numerical Modeling Fig 10 Temperature distribution in sections ... size and the shape of the microchannel that don't generate a very important vapor 114 Two Phase Flow, Phase Change and Numerical Modeling pressure drop For the liquid, the velocity increase is...

Ngày tải lên: 19/06/2014, 12:20

... 140 Two Phase Flow, Phase Change and Numerical Modeling Fig 13 presents the temperature distribution till solidus ... SPH: 40 K; solidus temperature = 1484ºC; (all temperatures in the graph are in ºC) 142 Two Phase Flow, Phase Change and Numerical Modeling Fig 16 presents the temperature distribution till solidus ... productivity reasons, the maximum attainable casting speeds are selected in normal 144 Two Phase Flow, Phase Change and Numerical Modeling practice, so to avoid redundancy only results at real...

Ngày tải lên: 19/06/2014, 12:20

... 170 Two Phase Flow, Phase Change and Numerical Modeling Diamond, P.H et al (1994) Self-regulating shear flow turbulence: a paradigm for the L to H transition, ... transport model, Phys of Plasmas, Vol.4, No.7 (July 1997), pp 2482-2496, ISSN 1070-664X 172 Two Phase Flow, Phase Change and Numerical Modeling Weiland, J (2000) Collective Modes in Inhomogeneous Plasma, ... non-swirling jet against a solid wall Their results are later validated by Particle Image 174 Two Phase Flow, Phase Change and Numerical Modeling Will-be-set-by-IN-TECH Velocimetry (PIV) experimental...

Ngày tải lên: 19/06/2014, 12:20

... Swirl Angle 202 Two Phase Flow, Phase Change and Numerical Modeling From Figure 10, it is quite evident that the CRZ acts as a “solid” body around which the strong swirling jet flows This is important, ... Swirl and Applications for Enhanced Heat Transfer and Flow Mixing Fig 12 Impact of Re and θ on Azimuthal Velocity Field 203 204 Two Phase Flow, Phase Change and Numerical Modeling The single-jet ... 214 Two Phase Flow, Phase Change and Numerical Modeling References Aboelkassem, Y., Vatistas, G H., and Esmail, N (2005) Viscous Dissipation of Rankine Vortex Profile in Zero Meridional Flow, Acta...

Ngày tải lên: 19/06/2014, 12:20

... necessary for valence electrons to break through the 7.8 eV band gap (Carr et al., 2003) whereas at 1ω seven photons at 1.18 eV would 234 Two Phase Flow, Phase Change and Numerical Modeling Will-be-set-by-IN-TECH ... are not large enough to reproduce experimental results whatever the 1ω fluence 232 16 Two Phase Flow, Phase Change and Numerical Modeling Will-be-set-by-IN-TECH On Fig 5, green and orange dash ... 230 14 Two Phase Flow, Phase Change and Numerical Modeling Will-be-set-by-IN-TECH Where [a− ( F ), a+ ( F )] is the...

Ngày tải lên: 19/06/2014, 12:20

... for flow of twophase steam-water mixture Simplification of assuming the same interfacial pressure for the two phases, with equal phasic pressures as well, is considered 264 Two Phase Flow, Phase ... labs) 272 Two Phase Flow, Phase Change and Numerical Modeling All these delayed effects combine in single -phase pressure drop term and two -phase pressure drop term acquiring 180° out-of -phase fluctuations ... and energy for a single -phase fluid and a two -phase fluid, respectively Single -phase flow equations read: ∂ρ ∂G + =0 ∂t ∂z ∂ ( ρh) ∂t + ∂ ( Gh ) ∂z (6) = Q ''' (7) Two -phase mixture is dealt with...

Ngày tải lên: 19/06/2014, 12:20

... single phase and two -phase heat transfer will be reviewed In the single phase, there is no TCL However, there is an apparent slip flow on a hydrophobic surface Most studies related to a slip flow ... will be covered by the slip flow phenomenon and the convective heat transfer related to the slip flow on the hydrophobic surface In the two -phase flow, various two -phase heat transfers including ... involved This equation also applies if the gas phase is another liquid, immiscible with the droplet of the first liquid phase 314 Two Phase Flow, Phase Change and Numerical Modeling γ LG θ γ SL...

Ngày tải lên: 19/06/2014, 12:20

... 320 Two Phase Flow, Phase Change and Numerical Modeling 3.2 Two -phase heat transfer 3.2.1 Evaporation Evaporation is one of major two -phase heat transfer mechanisms In ... two -phase flow patterns in the microchannel with different wetting surfaces They observed a new flow pattern in the hydrophobic microchannel, which is named drop-wise slug (Fig 27) A major flow ... in Fig 29 332 Two Phase Flow, Phase Change and Numerical Modeling Fig 26 A single glass microchannel and six gold micro heaters (Choi & Kim, 2008) Fig 27 A drop-wise slug flow pattern in a hydrophobic...

Ngày tải lên: 19/06/2014, 12:20

... Fig Mass flow rate for laminar flow at the steady state versus modified Rayleigh number at different G/H ratios (HHVCHV) 372 Two Phase Flow, Phase Change and Numerical Modeling MASS FLOW RATE ... neighbouring images along the flow direction In Fig 17, error bars on the interferometer data indicate uncertainty of 95 % confidence Both results show good 358 Two Phase Flow, Phase Change and Numerical ... Transactions of the ASME, 118, 132-139 Qu, W & Mudawar, I (2004) Flow boiling heat transfer in two -phase micro-channel heat sink-II Annular two -phase flow model, International Journal of Heat Mass Transfer,...

Ngày tải lên: 19/06/2014, 12:20

... pressure drop of two -phase flow in adiabatic region (Zhang & Webb, 2001), the Tran correlation (Eq 23) for the friction pressure drop of two -phase flow in 384 Two Phase Flow, Phase Change and Numerical ... condition of single- and two phase flows The obtained results show that the one-dimensional two -phase separate flow model can be used to describe heat transfer and fluid flow in the thermosyphon ... for the friction pressure drop of two -phase flow in adiabatic region, the Tran correlation (Tran et al., 2000) for the friction pressure drop of two -phase flow in diabatic region and the Mikielewicz...

Ngày tải lên: 19/06/2014, 12:20

... flowing through a cylindrical minichannel Effects of Reynolds number and concentration of nanoparticles on the heat transfer performance are also reported and discussed 422 Two Phase Flow, Phase ... pressure drops in nanofluid flow and values calculated in assumption of single phase fluid flow with viscosity of the nanofluid [58-60] An alternative merit criterion for laminar flow [57] was suggested ... that dissipate more energy within the liquid thereby increasing its temperature 414 26 Two Phase Flow, Phase Change and Numerical Modeling Will-be-set-by-IN-TECH φ φ0 /8 φ0 /4 φ0 /2 φ0 (a) Evolution...

Ngày tải lên: 19/06/2014, 12:20