Development of Gas-Liquid Slug Flow Measurement Using Continuous-Wave Doppler Ultrasound and Bandpass Power Spectral Density
This paper addresses the issues of slug detection and characterization in air-water two-phase flow in a vertical pipeline. A novel non-invasive measurement technique using continuous-wave Doppler ultrasound (CWDU) and bandpass power spectral density (BPSD) is proposed for multiphase flow application...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-01-01
|
| Series: | ChemEngineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2305-7084/5/1/2 |
| _version_ | 1797414403645112320 |
|---|---|
| author | Somtochukwu Godfrey Nnabuife Prafull Sharma Ebuwa Iyore Aburime Pauline Long’or Lokidor Abdulrauf Bello |
| author_facet | Somtochukwu Godfrey Nnabuife Prafull Sharma Ebuwa Iyore Aburime Pauline Long’or Lokidor Abdulrauf Bello |
| author_sort | Somtochukwu Godfrey Nnabuife |
| collection | DOAJ |
| description | This paper addresses the issues of slug detection and characterization in air-water two-phase flow in a vertical pipeline. A novel non-invasive measurement technique using continuous-wave Doppler ultrasound (CWDU) and bandpass power spectral density (BPSD) is proposed for multiphase flow applications and compared with the more established gamma-ray densitometry measurement. In this work, analysis using time-frequency analysis of the CWDU is performed to infer the applicability of the BPSD method for observing the slug front and trailing bubbles in a multiphase flow. The CWDU used a piezo transmitter/receiver pair with an ultrasonic frequency of 500 kHz. Signal processing on the demodulated signal of Doppler frequency was done using the Butterworth bandpass filter on the power spectral density which reveals slugs from background bubbles. The experiments were carried out in the 2” vertical pipeline-riser at the process system engineering laboratory at Cranfield University. The 2-inch test facility used in this experiment is made up of a 54.8 mm internal diameter and 10.5 m high vertical riser connected to a 40 m long horizontal pipeline. Taylor bubbles were generated using a quick-closing air valve placed at the bottom of the riser underwater flow, with rates of 0.5 litres/s, 2 litres/s, and 4 litres/s. The CWDU spectrum of the measured signal along with the BPSD method is shown to describe the distinctive nature of the slugs. |
| first_indexed | 2024-03-09T05:32:34Z |
| format | Article |
| id | doaj.art-b02082fabe7b465e8dbb8cbd54fa0730 |
| institution | Directory Open Access Journal |
| issn | 2305-7084 |
| language | English |
| last_indexed | 2024-03-09T05:32:34Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | ChemEngineering |
| spelling | doaj.art-b02082fabe7b465e8dbb8cbd54fa07302023-12-03T12:31:17ZengMDPI AGChemEngineering2305-70842021-01-0151210.3390/chemengineering5010002Development of Gas-Liquid Slug Flow Measurement Using Continuous-Wave Doppler Ultrasound and Bandpass Power Spectral DensitySomtochukwu Godfrey Nnabuife0Prafull Sharma1Ebuwa Iyore Aburime2Pauline Long’or Lokidor3Abdulrauf Bello4School of Water, Energy, and Environment, Cranfield University, Cranfield MK43 0AL, UKSchool of Water, Energy, and Environment, Cranfield University, Cranfield MK43 0AL, UKDepartment of Chemical Engineering, the University of Texas at Austin, Austin, TX 73301, USASchool of Water, Energy, and Environment, Cranfield University, Cranfield MK43 0AL, UKSchool of Engineering, University of Aberdeen King’s College, Aberdeen AB24 3UE, UKThis paper addresses the issues of slug detection and characterization in air-water two-phase flow in a vertical pipeline. A novel non-invasive measurement technique using continuous-wave Doppler ultrasound (CWDU) and bandpass power spectral density (BPSD) is proposed for multiphase flow applications and compared with the more established gamma-ray densitometry measurement. In this work, analysis using time-frequency analysis of the CWDU is performed to infer the applicability of the BPSD method for observing the slug front and trailing bubbles in a multiphase flow. The CWDU used a piezo transmitter/receiver pair with an ultrasonic frequency of 500 kHz. Signal processing on the demodulated signal of Doppler frequency was done using the Butterworth bandpass filter on the power spectral density which reveals slugs from background bubbles. The experiments were carried out in the 2” vertical pipeline-riser at the process system engineering laboratory at Cranfield University. The 2-inch test facility used in this experiment is made up of a 54.8 mm internal diameter and 10.5 m high vertical riser connected to a 40 m long horizontal pipeline. Taylor bubbles were generated using a quick-closing air valve placed at the bottom of the riser underwater flow, with rates of 0.5 litres/s, 2 litres/s, and 4 litres/s. The CWDU spectrum of the measured signal along with the BPSD method is shown to describe the distinctive nature of the slugs.https://www.mdpi.com/2305-7084/5/1/2continuous-wave Doppler ultrasound (CWDU)bandpass power spectral density (BPSD)spectral kurtosisvertical riserflow regimemultiphase flow measurement |
| spellingShingle | Somtochukwu Godfrey Nnabuife Prafull Sharma Ebuwa Iyore Aburime Pauline Long’or Lokidor Abdulrauf Bello Development of Gas-Liquid Slug Flow Measurement Using Continuous-Wave Doppler Ultrasound and Bandpass Power Spectral Density ChemEngineering continuous-wave Doppler ultrasound (CWDU) bandpass power spectral density (BPSD) spectral kurtosis vertical riser flow regime multiphase flow measurement |
| title | Development of Gas-Liquid Slug Flow Measurement Using Continuous-Wave Doppler Ultrasound and Bandpass Power Spectral Density |
| title_full | Development of Gas-Liquid Slug Flow Measurement Using Continuous-Wave Doppler Ultrasound and Bandpass Power Spectral Density |
| title_fullStr | Development of Gas-Liquid Slug Flow Measurement Using Continuous-Wave Doppler Ultrasound and Bandpass Power Spectral Density |
| title_full_unstemmed | Development of Gas-Liquid Slug Flow Measurement Using Continuous-Wave Doppler Ultrasound and Bandpass Power Spectral Density |
| title_short | Development of Gas-Liquid Slug Flow Measurement Using Continuous-Wave Doppler Ultrasound and Bandpass Power Spectral Density |
| title_sort | development of gas liquid slug flow measurement using continuous wave doppler ultrasound and bandpass power spectral density |
| topic | continuous-wave Doppler ultrasound (CWDU) bandpass power spectral density (BPSD) spectral kurtosis vertical riser flow regime multiphase flow measurement |
| url | https://www.mdpi.com/2305-7084/5/1/2 |
| work_keys_str_mv | AT somtochukwugodfreynnabuife developmentofgasliquidslugflowmeasurementusingcontinuouswavedopplerultrasoundandbandpasspowerspectraldensity AT prafullsharma developmentofgasliquidslugflowmeasurementusingcontinuouswavedopplerultrasoundandbandpasspowerspectraldensity AT ebuwaiyoreaburime developmentofgasliquidslugflowmeasurementusingcontinuouswavedopplerultrasoundandbandpasspowerspectraldensity AT paulinelongorlokidor developmentofgasliquidslugflowmeasurementusingcontinuouswavedopplerultrasoundandbandpasspowerspectraldensity AT abdulraufbello developmentofgasliquidslugflowmeasurementusingcontinuouswavedopplerultrasoundandbandpasspowerspectraldensity |