Identification of two-phase flow regime using ultrasonic phased array

Fang, Luyuan; Zeng, Qiaoqiao; Wang, Fan; Faraj, Yousef; Zhao, Ye; Lang, Yuexin; Wei, Zihui

doi:10.1016/j.flowmeasinst.2020.101726

Cited by 31 publications

(5 citation statements)

References 7 publications

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“…where Z = 1 S 2 ρ l ρ g , as shown in Equation (14). The expression of Equation ( 16) for the throat tube is identical with Equation (3) for the convergent one, but it is generally believed that the flow within it is more or less homogenous, so that S 2 ≈ 1 [27].…”

Section: Throat Sectionmentioning

confidence: 99%

“…In addition, the ETV can be designed to be more compact due to its significantly higher flow velocity in the throat section. In recent years, other measuring techniques, such as electrical capacitance [11,12], photon (gamma and X-ray) attenuation [13] and ultrasound [14,15], have been increasingly used in ETV for determining the void fraction and flow regimes of multiphase flow. For example, a wet-gas flowmeter based on an ETV tube and a sonar flowmeter has been proposed by Weatherford [16,17].…”

Section: Introductionmentioning

confidence: 99%

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A Wet Gas Metering System Based on the Extended-Throat Venturi Tube

Xue

Zhang

et al. 2021

Sensors

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Although the use of a classical Venturi tube for wet gas metering has been extensively studied in the literature, the use of an extended-throat Venturi (ETV) tube has rarely been reported since its first proposal by J. R. Fincke in 1999. The structure of an ETV is very simple, but due to the complexity of multiphase flow, its theoretical model has not been fully established yet. Therefore, in this paper theoretical models have been developed for the convergent and throat sections of an ETV, and the gradients of front and rear differential pressures are derived analytically. Several flowrate algorithms have been proposed and compared with the existing ones. Among them, the iteration algorithm is found to be the best. A reasonable explanation is provided for its performance. The relationship between the differential pressure gradient and the flowrate relative error is also studied, such that the relative error distributions varying with ETV measured flowrates can be derived. The gas flowrate error of ETV increases with the liquid content whilst the liquid flowrate error of ETV decreases with the liquid content, and the relative errors of liquid flowrate are generally 2 to 3 times larger than that of the gas flowrate. Finally, the ETV tends to be more accurate than the classical Venturi tube. The ETV can be designed more compact under the same signal intensity due to its significantly higher velocity in the throat section.

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Section: Throat Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Wet Gas Metering System Based on the Extended-Throat Venturi Tube

Xue

Zhang

et al. 2021

Sensors

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“…Conventional methods for monitoring blood flow include Doppler flowmetry [3,4], spectroscopy [5,6], sonography [7,8], computed tomography [9], electrical capacitance [10], photon attenuation [11], and ultrasound [12], which are used to visualize or analyze vessel structures as well as fluid flow. These methods are commonly used in hospitals as the instruments are expensive, have complicated operations, and require trained operators for accurate analyses [13].…”

Section: Introductionmentioning

confidence: 99%

Noninvasive Flow Monitoring in Simple Flow Phantom Using Resistive Strain Sensors

Jung

Kim

2021

Sensors

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In this paper, we introduce a monitoring method for flow expansion and contraction in a simple flow phantom based on electrical resistance changes in an epidermal strain sensor attached to the phantom. The flow phantom was fabricated to have a nonflat surface and small modulus that are analogous to human skin. The epidermal sensors made of polydopamine and polyvinyl alcohol show sufficient linearity (R = 0.9969), reproducibility, and self-adhesion properties, as well as high sensitivity to small modulus measurements (<1% tensile strain). Pulsatile flow monitoring experiments were performed by placing the epidermal sensor on the flow phantom and measuring the relative changes in resistance by the heartbeat. Experiments were conducted for three types of vessel diameters (1.5, 2, and 3 mm). In each of the experiments, the vessels were divided into Top, Middle, and Bottom positions. Experiments for each position show that the relative changes in resistance increase proportionally with the diameter of the vessel. The vessels located close to the epidermal layer have greater relative electrical changes. The results were analyzed using the Bernoulli equation and hoop stress formula. This study demonstrates the feasibility of a noninvasive flow monitoring method using a novel resistive strain sensor.

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“…High-speed multi-phase compressible flow induced by blast or shock waves is of interest to both basic science and engineering [1][2][3][4][5][6][7][8]. For example, when a sample of a solid metal is subjected to a high-power laser beam, the large negative pressures created in the metal lead to its instant melting followed by micro-spalling [9].…”

Section: Introductionmentioning

confidence: 99%

An All-Mach Number HLLC-Based Scheme for Multi-Phase Flow with Surface Tension

et al. 2021

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This paper presents an all-Mach method for two-phase inviscid flow in the presence of surface tension. A modified version of the Hartens–Lax–van Leer Contact (HLLC) solver is developed and combined for the first time with a widely used volume-of-fluid (VoF) method: the compressive interface capturing scheme for arbitrary meshes (CICSAM). This novel combination yields a scheme with both HLLC shock capturing as well as accurate liquid–gas interface tracking characteristics. It is achieved by reconstructing non-conservative (primitive) variables in a consistent manner to yield both robustness and accuracy. Liquid–gas interface curvature is computed via height functions and the convolution method. We emphasize the use of VoF in the interest of interface accuracy when modelling surface tension effects. The method is validated using a range of test-cases available in the literature. The results show flow features that are in sensible agreement with previous experimental and numerical work. In particular, the use of the HLLC-VoF combination leads to a sharp volume fraction and energy field with improved accuracy.

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Identification of two-phase flow regime using ultrasonic phased array

Cited by 31 publications

References 7 publications

A Wet Gas Metering System Based on the Extended-Throat Venturi Tube

A Wet Gas Metering System Based on the Extended-Throat Venturi Tube

Noninvasive Flow Monitoring in Simple Flow Phantom Using Resistive Strain Sensors

An All-Mach Number HLLC-Based Scheme for Multi-Phase Flow with Surface Tension

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