Experimental Study of the Performance of a Venturi-Meter with Suspended Gas-Solid Flow

Document Type : Original Article


1 Mechanical Power eng. Faculty of eng.

2 Department of Mechanical Power Engineering, Faculty of Engineering, Menoufia University


4 Mechanical Power Engineering Department, Faculty of Engineering, Menoufia University, Shebin El-Kom Egypt


Due to the urgent need for electricity sources in Egypt, this investigation is an attempt to prepare a metering tool for measuring the flow rate of the suspended gas-solid mixture flows in coal thermal power stations. One of the simplest methods for accurately measuring the flow rate of pulverized coal in the thermal power stations is the venturi meter. In the present work, different geometrical models have been designed and applied for measuring air-coal mixture flow rate, considering the effect of different operational parameters on the pressure sensitivity, pressure recovery and performance of the venturi models. The measurements showed the effects of these parameters on the pressure drop and the pressure distribution. New charts have been deduced from the experimental data for seven non-standard venturi models that shows different effects of particle size, loading ratio and throat length of venturi. From the experimental results a new correlation for two-phase flow discharge coefficient is deduced in the present study and comparison between the experimental and calculated is done with error percentage from +25% to -20%.


[1] Allen R.W.K. and van Santen A., “Designing for pressure drop in Venturi scrubbers: the importance of dry pressure drop”, Chemical Engineering, 61, pp.203-211,1996.
[2] Allen R.W.K., “Prediction of Venturi scrubber grade efficiency curves using the contacting power law”, Powder Technology, 86, pp.137-144, 1996.
[3] Giddings D., Azzopardi B.J., Aroussi A. and Pickering S.J., “Optical investigation of a long-throated Venturi conveying inert spherical particulate with size range similar to pulverized coal”, Powder Technology, 207, pp.370-377, 2011.
 [4] Zhansong W. and Fei X., “Optimization of Venturi tube design for pipeline pulverized coal flow measurements”, Energy Power, 2, pp.369-373, 2008.
[5] Cai L., Jiawei H., Hengyu L., Liu S., Gaoyang Y., Xiaoping C., and Changsui Z., “Resistance characteristics of pressure letdown in dense-phase pneumatic conveying”, Chemical Engineering, 49, pp.511-518, 2016.
[6] Kai L., Haifeng L., Xiaolei G., Xiaolin S., Shunlong T., and Xin G., “Experimental study on flow characteristics and pressure drop of gas–coal mixture through venturi”, Powder Technology, 268, pp.401- 411, 2014.
[7] Azzopardi B.J., Teixeira S.F.C.F. and Pulford C.I., “A quasi-one-dimensional model for gas-solid flow in ventures”, Powder Technology, 102, pp.281-288, 1999.
[8] Haifeng L., Xiaolei G., Wanjie H., Kai L., and Xin G., “Flow characteristics and pressure drop across the Laval nozzle in dense phase pneumatic conveying of the pulverized coal”, Chemical Engineering and Processing, 50, pp.702-708, 2011.
[9] Cai L., John R., Liu S., Gaoyang Y., Xiaoping C., and Changsui Z., “Experimental investigation of pressure letdown flow characteristics in dense-phase pneumatic conveying at high pressure”, Powder Technology, 277, pp.171-180, 2015.
 [10] Haifeng L., Xiaolei G., Peng L., Kai L., and Xin G., “Design optimization of a venturi tube geometry in dense-phase pneumatic conveying of pulverized coal for entrained-flow gasification”, Chemical Engineering, 120, pp.208-217, 2017.
[11] Richard H., “System for measuring entrained solid flow”, New York, N.Y., Babcock and Wilcox Technology Inc, 1980.
[12] Herbreteau C. and Board R., “Experimental study of parameters which influence the energy minimum in horizontal gas-solid conveying”, Powder Technology, 112, pp.213–220, 2000.
[13] Reader-H., Brunton W.C., Gibson J.J., Hodges D., and Nicholson I.G., "Discharge coefficients of Venturi tubes with standard and non-standard convergent angles”, Flow Measurement and Instrumentation, 12, pp.135-145, 2001.
[14] Gary O. and Anthony P., “Flow-Rate measurement in two-phase flow”, Fluid Mech., 36, pp.149-172, 2004.
[15] Wang Z.L., Ding Y.L. and Ghadiri M., “Flow of a gas-solid two-phase mixture through a packed bed”, Chemical and Particle Science, 59, pp. 3071-3079, 2004.
[16] Hu H.L., Xu T.M., Hui S.E. and Zhou Q.L., “A novel capacitive system for the concentration measurement of pneumatically conveyed pulverized fuel at power stations”, Flow Measurement and Instrumentation, 17, pp.87-92, 2006.
[17] Ali M., Qi Y. C. and Mehboob K., “A Review of Performance of a Venturi Scrubber”, Nuclear Science and Technology, 4(19), pp.3811-3818,2012.
[18] Ying X., Qiang Z., Tao Z. and Xili B., “An overreading model for nonstandard Venturi meters based on H correction factor”, Flow Measurement, 61, pp.100-106, 2015.
[19] Grazia M., Mario De S. and Bruno P., “Two-phase flow measurements at high void fraction by a Venturi Meter”, Flow Measurement, 77, pp.167-175,2014.
[20] Schade K.P., Erdmann H.J., Hadrich Th., Schneider H., Frank T. and Bernert K., “Experimental and numerical investigation of particle erosion caused by pulverized fuel in channels and pipework of coal-fired power plant”, Powder Technology 125, pp.242-250, 2002.
[21] Xiaoqiang Z., Dongfeng Z., Wang and Yide G., “Transportation characteristics of gas-solid two-phase flow in a long-distance pipeline”, Particuology, 21, pp.196-202,2015.
[22] Thiago F. de P., Rodrigo B. and José T. F., “Gas-Solid Flow Behavior in a Pneumatic Conveying System for Drying Applications: Coarse Particles Feeding with a Venturi Device”, Chemical Engineering, 5, pp.225-238, 2015.
[23] Richard H. B., “Particle Collection and Pressure Drop in Venturi Scrubbers”, Chemical Engineering, 12, pp.40-50,1973.
 [24] Giddings D., Azzopardi B.J., Aroussi A. and Pickering S.J., “Absolute measurement of pneumatically conveyed powder using a single long throat venturi”, Powder Technology, 172, pp.149-156,2007.
[25] El-Behery S. M., El-Askary W. A., Ibrahim K. A. and Mofreh H. Hamed., " Porous Particles Drying in a Vertical Upward Pneumatic Conveying Dryer ", International Journal of Aerospace and Mechanical Engineering, pp.110-125,2011.
[26] El-Askary W. A., Ibrahim K. A., El-Behery S. M., Mofreh H. Hamed. and Al-Agha M.S.," Performance of vertical diffusers carrying gas-solid flow: experimental and numerical studies", Powder Technology, 273, pp.19-32,2015.
[27] Zhang J., Xiao L., Zhaoyang C., Yu Z., Gang L., Kefeng Y. and Tao L., "Gas-Lifting Characteristics of Methane-Water Mixture and Its Potential Application for Self-Eruption Production of Marine Natural Gas Hydrates". Energies, 240, pp.1-22, 2018.
[28] Holman J.P., "Experimental methods for engineers", 7th ed. McGraw-Hill,2000.
[29] Ghonim, T. A., Sheha, M., Sakr, I. M. and El-Askary, W. A., " Experimental study on Gas-Solid mixture flows in a Venturi", 18th International Conference on Applied Mechanics and Mechanical Engineering, 3-5 April, pp.18-29,2018.
[30] El-Behery S. M., El-Askary W. A., Ibrahim K. A. and Mofreh H. Hamed., "Numerical and experimental studies of heat transfer in particle-laden gas flows through a vertical riser", International Journal of Heat and Fluid Flow, 30, pp.118-130,2012.
[31] Doss, E.," Analysis and application of solid-gas flow inside a venturi with particle interaction", International Journal of Multiphase Flow, Vol. I 1, No. 4, pp. 445-458,1985.
Volume 43, Issue 3
Volume issued on 11/6/2020 in 5 Parts (PART 1: Electric Eng., PART 2: Mechanical Eng., PART 3: Civil Eng., PART 4: Basic Eng. Sciences, PART 5: Architecture Eng.)
July 2020
Pages 199-209