A comprehensive investigation on the recommendation and optimization of the steam non-equilibrium rapid condensation model under a wide range of boundary conditions

Desalination, Journal Year: 2025, Volume and Issue: 602, P. 118602 - 118602

Published: Jan. 24, 2025

Language: Английский

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Effect of moist air non-equilibrium condensation on airfoil performance based on a novel model

Aerospace Science and Technology, Journal Year: 2025, Volume and Issue: unknown, P. 110108 - 110108

Published: March 1, 2025

Language: Английский

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An investigation into the correlation between operating conditions and non-equilibrium condensation in supersonic nozzles: Focusing on supercooled, saturated, and superheated vapor states

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(3)

Published: March 1, 2025

Non-equilibrium condensation (NQC) is a critical process within supersonic nozzle, leading to thermodynamic losses and significant alterations in the flow structure. The release of latent heat during NQC results increased pressure, temperature, reduction Mach number. This study investigates influence different input vapor types—superheated, saturated, supercooled—on structure two-phase regimes nozzle. A compressible model employed simulate behavior. Results reveal that type has profound impact on pattern. Supercooled associated with gradual pressure increase converging section, whereas saturated superheated vapors exhibit abrupt surges at throat diverging section. Furthermore, supercooled demonstrates higher mass fraction liquid larger droplet radii compared vapors. Saturated exhibits highest rate, while experiences loss. Superheated vapor, other hand, entropy production. Compared 10-degree 1.33% decrease 9.06% loss, reductions frictional thermal production by 3.61% 2.56%, respectively.

Language: Английский

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Prediction of the non-equilibrium condensation characteristic of CO2 based on a Laval nozzle to improve carbon capture efficiency

Fuel, Journal Year: 2024, Volume and Issue: 381, P. 133303 - 133303

Published: Sept. 30, 2024

Language: Английский

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The effect of the inlet steam superheat degree on the non-equilibrium condensation in steam turbine cascade

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(4)

Published: April 1, 2024

Due to the high steam velocity and low thermal parameters at turbine's final stage, generates non-equilibrium condensation forms a large number of small droplets during process pressure expansion. The wet mixed with impinges on turbine blades, endangering operation safety reducing work efficiency. This article modifies control equation embeds it into numerical simulation software make calculation results more accurate. By modifying inlet superheat in classical experiments, characteristics Moses–Stein nozzles Dykas cascades are studied. show that increasing can effectively suppress generation reduce outlet liquid mass fraction. minimum supercooling temperature is only related working fluid (the model used this around 20 K). When cascade large, rapid region mainly near suction surface. In contrast, when low, zone location affected by intensity internal shock waves cascade. Increasing not increases wave but also decreases angle passage. K, heat efficiency about 1%.

Language: Английский

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Evaluating and optimizing of steam ejector performance considering heterogeneous condensation using Machine learning framework

Energy, Journal Year: 2024, Volume and Issue: 305, P. 132240 - 132240

Published: June 27, 2024

Language: Английский

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Effects of motive flow temperature on holding steam ejector Performance under Condenser temperature change by considering Entropy generation and Non-equilibrium condensation

Applied Thermal Engineering, Journal Year: 2024, Volume and Issue: 257, P. 124268 - 124268

Published: Aug. 29, 2024

Language: Английский

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Passive control of the condensing flows in the three-dimensional steam turbine blade using a suction technique

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(4)

Published: April 1, 2024

A great amount of thermodynamic losses and mechanical damages in industrial equipment occur due to the condensation phenomenon two-phase flows such equipment. In this study, supercooled vapor suction has been passively used 3D (three-dimensional) steam turbine stationary blade. Supercooled is one techniques turbines for resisting corrosion erosion. For flow suction, design as follows: an embedded channel inside blade nucleation zone, which utmost non-equilibrium mode; furthermore, impacts location surface channels devised on following parameters have investigated: flow, ratio, losses, erosion average droplet growth, kinetic energy. Based results, optimal case (case F), radius, energy decrease by 3%, 24%, 6.5%, 2%, respectively; also, ratio 3.6%. The present research reveals that a necessary condensation, decreases This fact can provide designers with beneficial information.

Language: Английский

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Numerical investigation and optimization of heterogeneous-homogeneous coupled condensation in steam turbines of tower solar power system

International Communications in Heat and Mass Transfer, Journal Year: 2024, Volume and Issue: 159, P. 108336 - 108336

Published: Nov. 16, 2024

Language: Английский

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Nanoparticles-induced heterogeneous condensation and geometry optimizations to enhance liquefaction efficiency and mitigate exergy loss in a novel hydrogen liquefaction two-phase expander

Energy, Journal Year: 2024, Volume and Issue: unknown, P. 134006 - 134006

Published: Nov. 1, 2024

Language: Английский

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