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Article
Dynamic characteristics of molten droplets and hot particles falling in liquid pool
The dynamic characteristics of molten droplets and hot particles at the very beginning of their fall into coolant pools are presented. The falling course of a single droplet or a single hot particle was record...
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Article
Numerical Simulation of Condensation of Bubbles under Microgravity Conditions by Moving Mesh Method in the Double-staggered Grid
A numerical 2D method for simulation of two-phase flows including phase change under microgravity conditions is presented in this paper, with a level set method being coupled with the moving mesh method in the...
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Article
A Study on the Flow Instability in Evaporator of Gravity Separate Type Heat Pipe
The flow characteristics and instability in the small inclination angle evaporator of Gravity Separate Type Heat Pipe (GSTHP) were studied. Flow patterns were investigated by a quartz glass tube with a Φ25 × 2...
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Article
Numerical Simulation of Bubble Dynamics in Microgravity
A numerical method for the simulation of two-phase flows under microgravity conditions is presented in this paper. The level set method is combined with the moving mesh method in a collocated grid to capture t...
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Article
An investigation into the heat transfer characteristics of spiral wall with internal rib in a supercritical sliding-pressure operation once-through boiler
Within the pressure range of 9–28 MPa, mass velocity range of 600–1 200 kg/(m2·s), and heat flux range of 200–500 kW/m2, experiments were performed to investigate the heat transfer to water in the inclned upward ...
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Article
Experimental investigations on boiling heat transfer inside miniature circular tubes immersed in FC-72
To investigate the size effect on the characteristics of boiling heat transfer, boiling behavior of FC-72 in heated vertical miniature circular tubes immersed in a liquid pool was experimentally studied. Two A...
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Article
Flow boiling heat transfer in a vertical spirally internally ribbed tube
Experiments of flow boiling heat transfer and two-phase flow frictional pressure drop in a spirally internally ribbed tube (φ22×5.5 mm) and a smooth tube (φ19×2 mm) were conducted, respectively, under the con...
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Article
Numerical simulation of transient 3-D turbulent heated jet into crossflow in a thick-wall T-junction pipe
The present work is to investigate the transient three-dimensional heated turbulent jet into crossflow in a thick-wall T-junction pipe using CFD package. Two cases with the jet-to-crossflow velocity ratio of 0...
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Article
Experimental investigation of transient heat transfer in the once-through boiler water separator
The transient heat transfer between working fluid and inner wall of 600 MW supercritical pressure boiler’s water separator model during start-up was experimentally explored. The test conditions for water steam...
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Article
A numerical model prediction for boiling multi channel flow rate distribution and application in 600MW supercritical variable-pressure once-through boiler with vertical tube coils
Flow rate distribution is important in a multi channel system when the flow is heated non-uniformly. This paper describes a steady state approach for obtaining the flow distribution among various tubes of comp...
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Article
Two-phase critical discharge of initially saturated or subcooled water flowing in sharp-edged tubes at high pressure
The transient critical flow experiment with sharp-edged tubes as the break geometries is conducted in high pressure convective circulation test loop of **’an Jiaotong University. The initial steady operation p...
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Article
Acoustic wave prediction in flowing steam-water two-phase mixture
The transient two-fluid model has been used to develop a general relation for acoustic waves. The analysis is valid in principle over the whole void fraction region. Flow pattern transitions from one flow regi...
