Flow averaging tube geometry improvement for K-factor stability increase

• Autorzy: Kabaciński M. , Pospolita J.
• Języki publikacji: EN

Abstrakty

EN

Fluid flow around two-profile averaging differential pressure sensor was investigated in this paper. Research concentrated particularly on fluid movement direction and velocity over the investigated flow sensor. Analysis was conducted experimentally in low velocity wind tunnel. Because of large number of measuring points placed very close to each other, it was decided that velocity profile measurement will be performed by means of fully automated test stand. Due to a recirculation of the stream in the vicinity of the probe tested in the wind tunnel, an original two-direction probe was used. A linear module with a stepper motor formed an integral part of the measurement system. The location of the measuring probe, the possibility of adjusting stream mean velocities and data acquisition was undertaken by means of a dedicated program. The above mentioned investigation method helped to improve the metrological properties of the flowmeter applying non symmetrical probe cross-section forced air stream to be redirected in the desired direction. This modification significantly increased K-factor value and stability of air flow through the contraction of the flowmeter.

Słowa kluczowe

EN

velocity profiles; air flow measurement; closed conduits; automated test stand; flow averaging Pitot tube

• Wydawca: Wydawnictwo PAK
• Czasopismo: Measurement Automation Monitoring
• Rocznik: 2017
• Tom: Vol. 63, No. 1
• Strony: 2--5
• Opis fizyczny: Bibliogr. 12 poz., rys., tab., wykr., wzory

Twórcy

autor

Kabaciński M.

• Department of Thermal Engineering and Industrial Facilities, Opole University of Technology, 5 Mikołajczyka St., 45-271 Opole, Poland

autor

Pospolita J.

• Department of Thermal Engineering and Industrial Facilities, Opole University of Technology , 5 Mikołajczyka St., 45-271 Opole, Poland

Bibliografia

• [1] Dobrowolski B., Kabaciński M., Pospolita J.: A mathematical model of the self-averaging Pitot tube. A mathematical model of a flow sensor. Flow Measurement and Instrumentation vol. 16, issue 4, pp. 251-256, August 2005.
• [2] Accutube, Technical documentation, http://www.accutube.com/
• [3] Preso, Technical documentation, http://www.preso.com/
• [4] Veris, Technical documentation, http://www.veris-inc.com/
• [5] Mobrey, Technical documentation, http://www.mobrey.com/
• [6] Kabaciński M., Pospolita J.: Numerical and experimental research on new cross-sections of averaging Pitot tubes. Flow Measurement and Instrumentation, vol. 19, Number 1, pp. 17-27, March 2008.
• [7] Kabaciński M., Pospolita J.: Experimental research into a new design of flow-averaging tube. Flow Measurement and Instrumentation, vol. 22, 2011, pp. 421-427.
• [8] Kabaciński M., Pawliczek R.: Fully automated system for air velocity profile measurement. The Archive of Mechanical Engineering, Vol. LIX, No.4, 2012, pp.435-451.
• [9] Kabaciński M.: Experimental Research on Velocity Profiles in Selected Flow Systems TASK Quarterly, 3-4/2012, pp. 185-201.
• [10] ISO 3966:2008: Measurement of fluid flow in closed conduits - Velocity area method using Pitot static tubes, 2008.
• [11] Cierniak W.: Measurement of the average flow velocity with the Pitot-Prandtl tube. Archiving of Mining Sciences 48, 2003, pp. 415–424.
• [12] Obayashi H., Tasaka Y., Kon S., Takeda Y.: Velocity vector profile measurement using multiple ultrasonic transducers. Flow Measurement and Instrumentation, 2008, pp. 189–195.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).