[1] Zhang Pu**, Kong Li, Huang Xinhan,. Characteristics of a Flow Transducer Based on Polarized Charge* [J]. Journal of Southeast University (English Edition), 2001, 17 (2): 36-40. [doi:10.3969/j.issn.1003-7985.2001.02.009]

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Characteristics of a Flow Transducer Based on Polarized Charge^*()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

17

Issue:

2001 2

Page:

36-40

Research Field:

Electrical Engineering

Publishing date:

2001-12-30

Info

Title:

Characteristics of a Flow Transducer Based on Polarized Charge^*

Author(s):

Zhang Pu^**;  Kong Li;  Huang Xinhan

Department of Control Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Keywords:

polarized charge;  gas-solid two-phase flow;  measurement model

PACS:

TM930.12

DOI:

10.3969/j.issn.1003-7985.2001.02.009

Abstract:

In this paper we analyze the characteristics of a flow transducer based on polarized charge. The effects of the charged particles in pneumatic pipeline on the measurement pipe potential are discussed in detail and the equivalent circuits of the potential measurement are presented. On this bases, the relationships between mass flowrate and the electrical potential are obtained for different time constants of the measurement circuit. A satisfactory model is presented based on the characteristics of gas-solid two-phase flow. The linearity of the model is verified by the experiment results. The transducer, which is coaxially connected with the transport pipeline, does not disturb the flow state and has the features of ruggedness and durability, it is especially suitable for industry process control.

References:

[1] G.S. Lian, Theory of multiphase flowage, Publishing company of Zhejiang University, Hangzhou, pp.129-166, 1989
[2.] R.S. Medlock, and R.A. Furness, Mass flow measurement — a state of the art review, Measurement+Control, vol.23, no.5, pp.100-113, 1990
[3] C.Zhu, and S.L.Soo, A modified theory for electrostatic probe measurements of particles mass flows in dense gas-solid suspensions, J Appl Phys, vol.72, no.5, pp.2060-2062, 1992
[4] R.G.Green, M.F.Rahamat, and K. Dutton, et al., Velocity and mass flow rate profiles of dry powders in a gravity drop conveyor using an electrodynamic tomography system, Meas Sci Technol, no.8, pp.427-436, 1997
[5] J.Cross, Electrostatics: principles, problems and applications, Adam Hilger, Bristol, pp.41-46, 1987
[6.] Z.G.Bao, Principles of electrostatic technique(In Chinese), Publishing company of Beijing University of Science and Technology, Beijing, pp.30-67, 1993

Memo

Memo:

* The project supported by the National Natural Science Foundation of China(69874017).
** Born in 1966, female, doctor, associate professor.

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