Results 161 to 170 of about 30,981 (205)
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Noninvasive Flow Regime Identification for Wet Gas Flow Based on Flow-induced Vibration
Chinese Journal of Chemical Engineering, 2010Abstract A novel noninvasive approach, based on flow-induced vibration, to the online flow regime identification for wet gas flow in a horizontal pipeline is proposed. Research into the flow-induced vibration response for the wet gas flow was conducted under the conditions of pipe diameter 50 mm, pressure from 0.25 MPa to 0.35 MPa, Lockhart ...
Yanfeng Geng
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Flow regime identification in a two-phase flow using wavelet transform
Experiments in Fluids, 2002This study addresses the problem of the automatic flow regime identification in two-phase flows in pipes. A novel wavelet transform-based approach is proposed and validated using time series of differential pressure fluctuations. The experimental data on the differential pressure measured in a vertically installed Venturi meter for air–water flow were ...
T. Elperin, M. Klochko
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Flow regime identification in a novel circulating-turbulent fluidized bed
Chemical Engineering Journal, 2014Abstract Whether flow dynamics in a novel circulating-turbulent fluidized bed (C-TFB) belongs to a new flow regime or just a transition state is controversial. In order to resolve this confusion, transient fluctuation signal processing and wavelet analysis have been used to identify the flow regimes in five specially designed flow systems, which have
Qiang Geng, Xiaolin Zhu, Yibin Liu
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Fuzzy logical flow regime identification for two-phase flow
2015 11th International Conference on Natural Computation (ICNC), 2015The conventional flow regime map to determine the correlations of interfacial transfer in immiscible multi-phase flow is reconstructed using the fuzzy logic membership function in the present study. Since in the present fuzzy flow regime the interfacial transfer rate is determined by the summation of each term weighted with the its own membership, the ...
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Global Flow Regime Identification in a Rod Bundle Geometry
Volume 3: Thermal Hydraulics; Instrumentation and Controls, 2008Flow regime maps were obtained for an adiabatic air-water two phase flow through a flow channel with 8×8 rod bundle, which simulated a typical rod bundle in a BWR. Impedance void meters were used to measure the area averaged void fraction at various axial locations in the flow channel The Cumulative Probability Distribution Functions (CPDF) of the ...
Sidharth Paranjape +4 more
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Physics of Fluids, 2023
Oscillatory flows past two identical circular cylinders are investigated by two-dimensional direct numerical simulations in the parameter space of gap ratio (0.5 ≤ G ≤ 4.0), angle of flow incidence (0° ≤ α ≤ 90°) and Keulegan–Carpenter number (4 ≤ KC ≤ 12) with a constant Reynolds number Re = 150, where G = L/D, KC = UmT/D and Re = UmD/υ with D being ...
Lin Lu, Zhongbing Zhou, Cheng Zhang
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Oscillatory flows past two identical circular cylinders are investigated by two-dimensional direct numerical simulations in the parameter space of gap ratio (0.5 ≤ G ≤ 4.0), angle of flow incidence (0° ≤ α ≤ 90°) and Keulegan–Carpenter number (4 ≤ KC ≤ 12) with a constant Reynolds number Re = 150, where G = L/D, KC = UmT/D and Re = UmD/υ with D being ...
Lin Lu, Zhongbing Zhou, Cheng Zhang
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New methods for flow regime identification in bubble columns and fluidized beds
Chemical Engineering Science, 2015Abstract New methods for flow regime identification were developed and applied to photon count time series measured in a bubble column (0.162 m in ID) and fluidized bed (0.438 m in ID). The signals in the bubble column (operated with an air-therminol system) were measured by means of Computed Tomography (CT), whereas the data in the fluidized bed ...
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A new intelligent method for flow regime identification in cooling pump of engine
2010 Sixth International Conference on Natural Computation, 2010Flow regime identification is very practical and academic significance for cavity research in cooling pump of engine but it is very complicated. A novel classification model that combined the particle swarm optimization (PSO) with support vector Machine (SVM) was put forward for flow regime identification in this study.
Li-hong Li +4 more
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Experimental identification of shock tunnel flow regimes.
AIAA Journal, 1969An analytic inversion of the matrix P(t) was determined by calculating the determinant and the co-factors. The details are omitted here for brevity but the result is given by Eqs. (34) and (35) t 3. Summary A simple analytic solution for the Lagrange multipliers has been derived in terms of flight time, Cartesian position, velocity and angular momentum
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Flow regime identification in cryogenic gas-liquid flow through vertical tubes
Cryogenics, 1995Abstract A method of identifying flow regimes in gas-liquid two-phase flow of cryogenic fluids through vertical tubes has been developed. In this method a small capacitor is used to sense the local void fraction of the flowing mixture. The capacitor is connected to a multivibrator whose pulse width is modulated in response to the changing void ...
R. Das, S. Pattanayak
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