Wet gas measurements of long-throat Venturi Tube based on forced annular flow

2021 ◽  
pp. 102037
Author(s):  
Weibiao Zheng ◽  
Ruomiao Liang ◽  
Xingkai Zhang ◽  
Ruiquan Liao ◽  
Dong Wang ◽  
...  
Keyword(s):  
Annular Flow ◽  
Venturi Tube ◽  
Wet Gas ◽  
Gas Measurements

Wet Gas Flow Measurement Base on a Symmetrical Venturi Tube

2012 ◽  
Vol 12 (1) ◽  
pp. 19-24 ◽  
Author(s):  
Lide Fang ◽  
Lili Pang ◽  
Xiaoting Li ◽  
Xiuming Xiang ◽  
Qinghua Lu
Keyword(s):  
Flow Measurement ◽  
Gas Flow ◽  
Venturi Tube ◽  
Wet Gas ◽  
Measurement Base

scholarly journals Improving the Efficiency of the Wet Gas Cleaning Process in a Venturi Tube by Superposition of Ultrasonic Fields

2019 ◽  
Vol 25 (4) ◽  
pp. 580-588
Author(s):  
V. N. Khmelev ◽  
◽  
A. V. Shalunov ◽  
V. A. Nesterov ◽  
A. C. Bochenkov ◽  
...  
Keyword(s):  
Venturi Tube ◽  
Cleaning Process ◽  
Gas Cleaning ◽  
Ultrasonic Fields ◽  
Wet Gas

Experimental Analysis of Venturi-Tube Behavior in Wet Gas Conditions

2020 ◽  
Author(s):  
Olav Mehlum ◽  
Øyvind Hundseid ◽  
Lars E. Bakken
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Volume Fraction ◽  
Volume Flow Rate ◽  
Venturi Tube ◽  
Low Flow ◽  
Detailed Knowledge ◽  
Operation Conditions ◽  
Wet Gas ◽  
Compressor Inlet

Abstract Subsea wet gas compressors have been successfully in operation for approximately 5 years. Their use has proven to increase the recovery by approximately 10% and achieve a reliability up to 98%. Further developed and operation of subsea wet gas compression require detailed knowledge of compressor operability and how shift in operational conditions affect the compressor system. The compressors ability to handle wet gas is documented in detail for a gas volume fraction limited down to 0.90. The 4–5 last year of operation proves the wet gas concepts capability. As years pass by, well pressure and production rate declines which causes the compressor operation point to shift towards the high head and low flow (surge) area of the characteristics. In addition, compressor inlet transients increase due to pipe surge (slugs), requiring a robust control system to prevent instabilities, e.g. compressor surge. It is therefore vital to understand how the compressor inlet flow device behaves at different wet operation conditions. The article documents how a standard dry gas venturi tube behave at different wet gas operation conditions. The venturi is designed according to ISO5167-4 for dry gas conditions and is tested at the low-pressure air water compressor test rig at NTNU. The primary objective of the work has been to visualize the wet flow regime through the transparent venturi tube and to document the wet gas flow rate measurements by means of single-phase meters. The venturi tube is tested in a GMF range from 1 to 0.83 at an air volume flow rate of 1.3m3/s.

Void fraction measurement using NIR technology for horizontal wet-gas annular flow

2016 ◽  
Vol 76 ◽  
pp. 98-108 ◽  
Author(s):  
Chao Wang ◽  
Ning Zhao ◽  
Lide Fang ◽  
Tao Zhang ◽  
Yue Feng
Keyword(s):  
Void Fraction ◽  
Annular Flow ◽  
Wet Gas ◽  
Fraction Measurement

scholarly journals Efficiency Increase of Wet Gas Cleaning from Dispersed Admixtures by the Application of Ultrasonic Fields

2016 ◽  
Vol 41 (4) ◽  
pp. 757-771 ◽  
Author(s):  
Vladimir N. Khmelev ◽  
Andrey V. Shalunov ◽  
Roman N. Golykh ◽  
Roman S. Dorovskikh ◽  
Viktor A. Nesterov ◽  
...  
Keyword(s):  
Sound Pressure Level ◽  
Sound Pressure ◽  
Ultrasonic Field ◽  
Pressure Level ◽  
Venturi Tube ◽  
Dust Extraction ◽  
Ultrasonic Action ◽  
Gas Cleaning ◽  
Wet Gas ◽  
Ultrasonic Influence

Abstract The article presents the results of research aimed at increase of the efficiency of gas cleaning equipment based on the Venturi tube using high-intensity ultrasound. The model based on known laws of hydrodynamics of multiphase mediums of dust-extraction in Venturi scrubbers was proposed. Modification of this model taking into account ultrasonic field allows evaluating optimum modes (sound pressure level) and conditions (direction of ultrasonic field, square and number of ultrasonic sources) of ultrasonic influence. It is evaluated that optimum for efficient gas cleaning is the mode of ultrasonic action at the frequency of 22 kHz with sound pressure level of 145. . . 155 dB at the installation of two radiators with area of 0.14 m2, four radiators with area of 0.11 m2 or six radiators with area of 0.08 m2 at the angle of 45 degrees to the axis of Venturi tube. Numerical calculations showed that realization of ultrasonic action is the most efficient for the reduction (up to 15 times) of the content of fine-dispersed fraction (2 μm and less), which is impossible to extract without ultrasonic action. The received theoretical results were confirmed by industrial testing by typical dust-extraction plant and used as foundations of development of apparatuses with the radiators of various sizes.

Study on the Key Factors of Wet Gas Metering Overreading in Standard Venturi Tube Base on DPM

2012 ◽  
Vol 220-223 ◽  
pp. 1693-1697 ◽  
Author(s):  
Ying Xu ◽  
Yi Zhao ◽  
Zheng Hai Long
Keyword(s):  
Froude Number ◽  
Relative Error ◽  
Venturi Tube ◽  
Experimental Results ◽  
Average Relative Error ◽  
Maximum Relative Error ◽  
Multiphase Model ◽  
Key Factors ◽  
Wet Gas

This article discusses how and why the wet gas metering overreading produce for a standard Venturi tube by analyzing the influence of the key parameters of X parameter, the Froude number and pressure. The adopted multiphase model is DPM. The results of simulation are compared with the experimental results of National Engineering Laboratory. The maximum relative error of the predicted overreading from simulation is 5.14% and the average relative error is less than 2.8%.

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

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 2120
Author(s):  
Haobai Xue ◽  
Peining Yu ◽  
Maomao Zhang ◽  
Haifeng Zhang ◽  
Encheng Wang ◽  
...  
Keyword(s):  
Relative Error ◽  
Theoretical Models ◽  
Venturi Tube ◽  
Iteration Algorithm ◽  
Liquid Content ◽  
Wet Gas ◽  
Error Distributions ◽  
Relative Errors ◽  
Throat Section ◽  
The Relationship

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.

scholarly journals Experiment and Numerical Simulation on Gas-Liquid Annular Flow through a Cone Sensor

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2923 ◽  
Author(s):  
Denghui He ◽  
Senlin Chen ◽  
Bofeng Bai
Keyword(s):  
Numerical Simulation ◽  
Annular Flow ◽  
Gas Flow ◽  
Low Pressure ◽  
Pressure Recovery ◽  
Liquid Distribution ◽  
Wet Gas ◽  
Sensor Structure ◽  
Gas Measurement ◽  
Flow Through

The cone meter has been paid increasing attention in wet gas measurement, due to its distinct advantages. However, the cone sensor, which is an essential primary element of the cone meter, plays a role in the measurement of wet gas flow that is important, but not fully understood. In this article, we investigate the gas-liquid annular flow through a cone sensor by experiment and numerical simulation. Emphasis is put on the influences of pressure recovery characteristics and flow structure, and how they are affected by the cone sensor. The results show that the vortex length is shortened in gas-liquid annular flow, compared with that in single-phase gas flow. The pressure recovery length is closely related with the vortex length, and shorter vortex length leads to shorter pressure recovery length. The gas-liquid distribution suggests that flow around the apex of back-cone is very stable, little liquid is entrained into the vortex, and no liquid appears around the low pressure tapping, which makes a more stable pressure at the apex of cone sensor feasible. This finding highlights the importance of obtaining the low pressure from the back-cone apex, which should be recommended in the multiphase flow measurement. Our results may help to guide the optimization of the cone sensor structure in the wet gas measurement.

Sign in / Sign up

Export Citation Format

Share Document