Experimental study on void fraction, pressure drop and flow regime analysis in a large ID piping system

Dang, Zhuoran; Yang, Zijiang; Yang, Xiaohong; Ishii, Mamoru

doi:10.1016/j.ijmultiphaseflow.2018.10.006

Cited by 27 publications

(9 citation statements)

References 20 publications

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“…Однако, следует отметить что экспериментальные данные, соответствующие условиям транспортировки пароводяной геотермальной смеси, как минимум по такому важному параметру как диаметр труб, отсутствуют. В экспериментах по определению истинного объемного газосодержания большим считается диаметр 0.15 м [14], в то время как трубопроводы пароводяной смеси на геотермальных месторождениях имеют диаметр от 0.3 м и выше.…”

Section: математическая модель Swipunclassified

“…При этом важно выбрать общий тип искомых корреляций. Наиболее теоретически обоснованным считается тип, относящийся к модели дрейфа [12]- [14], согласно которой усредненная по сечению скорость газовой фазы определяется формулой…”

Section: математическая модель Swipunclassified

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Development of mathematical models for calculating parameters during transportation of a steam-water mixture

Chermoshentseva¹,

Шулюпин²

2021

Вестник КРАУНЦ. Физико-Математические Науки

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В практике освоения геотермальных месторождений возникает необходимость нахождение взаимосвязи между параметрами потока. При транспортировке пароводяной смеси требуется определение условий, обеспечивающих стабильную работу трубопровода. На отечественных объектах геотермальной энергетики гидравлический расчет трубопроводов пароводяной смеси проводился с использованием компьютерной программы MODEL, разработанной авторами данной работы. Новые вызовы и появление теории устойчивости привели к созданию математической модели SWIP (Steam-Water Inclining Pipeline). В данной статье представлены этапы разработки авторами новой модели, отвечающей современным требованиям In the practice of developing geothermal fields, there is a need to find the dependence between the flow parameters. When transporting a steam-water mixture, it is necessary to determine the conditions that ensure the stability in the pipeline. At domestic geothermal energy, the hydraulic calculation of steam-water mixture pipelines was carried out using the computer program MODEL created by the authors of this work. New challenges and the emergence of the theory of stability led to the creation of a mathematical model SWIP (Stream-Water Inclining Pipeline). This article presents the stages of creating a new model by the authors that meets modern requirements.

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Section: математическая модель Swipunclassified

Development of mathematical models for calculating parameters during transportation of a steam-water mixture

Chermoshentseva¹,

Шулюпин²

2021

Вестник КРАУНЦ. Физико-Математические Науки

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“…However, there are no experimental data on the void fraction under the conditions of transportation of a steam-water geothermal mixture, at least for such an important parameter as pipe diameter. a diameter of 0.15 m is considered large in known experiments [14], while in this case, a diameter of geothermal pipelines more than 0.3 m. In this situation, the only way to obtain the necessary formulas is to analyze the main determining factors using indirect experimental data. In this case, it is important to choose the general type of the sought correlations.…”

Section: Mathematical Model Of Steam-water Flow In a Pipelinementioning

confidence: 99%

“…In this case, it is important to choose the general type of the sought correlations. The most theoretically justified is the type related to the drift model [13,14]. According to the drift model, the gas phase velocity averaged over the cross section is determined by the formula…”

Section: Mathematical Model Of Steam-water Flow In a Pipelinementioning

confidence: 99%

A new program for the hydraulic calculation of steam-water mixture pipelines in geothermal fields

2020

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A new mathematical model of steam-water flow in a pipeline, which takes into account the gravitational effect and satisfies new challenges in the development of geothermal fields with two-phase transportation of the heat carrier is presented. Taking into account the gravitational effect in the upstream flows, a method based on the “drift model”, which determines the steam velocity averaged over the crosssection was used. A similar method is proposed for downstream flows, but it determines the water velocity averaged over the cross-section. In this case, analogs of empirical coefficients were used. These coefficients determined from the condition of equality of parameters calculated using different approaches in a horizontal flow. The model was verified, which showed positive results. The proposed model significantly expands the possibilities of hydraulic calculation of steam-water mixture pipelines in geothermal fields.

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“…As LM flows inside a micropipe, friction between the LM and the pipe wall causes a pressure drop, resulting in varying amounts of LM oxide being attached to different locations on the pipe wall. The microstructure on the inner wall of the pipe can further enhance the sensitivity of LM deformation. − …”

Section: Introductionmentioning

confidence: 99%

Liquid Metal-Based Angle Detection Sensor

Zhan

et al. 2023

ACS Appl. Electron. Mater.

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Liquid metal (LM) as the universal artificial biomimetic sensory material has attracted much interest in academic and industrial applications, such as soft robots, flexible electronics, and micro−nano devices. It remains a pivotal challenge to develop a stable and highly sensitive angle detection with a rapid response. Herein, we present an LM-based angle detection sensor. Ga-based LM is gradually injected into hollow fibers with rough internal structures, resulting in a gradient of LM content inside the fibers due to the synergistic effect of pressure drop and the fast formation of an oxide film on its surface. The LM is affected by the gravity pressure when the fiber is tilted, and the Laplace pressure on the surface of the LM continuously reaches an equilibrium state to induce the continuous deformation of the LM. The proposed sensor with highly sensitive to the tilt angle and showcases a linear relation with the tilt angle. For its advantages, this work shows a great potential application in sensor fields and opens routes for the application of electronic whiskers.

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Experimental study on void fraction, pressure drop and flow regime analysis in a large ID piping system

Cited by 27 publications

References 20 publications

Development of mathematical models for calculating parameters during transportation of a steam-water mixture

Development of mathematical models for calculating parameters during transportation of a steam-water mixture

A new program for the hydraulic calculation of steam-water mixture pipelines in geothermal fields

Liquid Metal-Based Angle Detection Sensor

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