Variation of Entrance Length Effect on EHD Gas Pump Performance

Article Preview

Abstract:

The effects of entrance length on performance and flow characteristic of EHD gas pump has been experimentally examined in this study. A 61.8mm-in-diameter EHD gas pump with eight evenly spaced emitting electrodes and flush mounted on the tube inner wall is used for this investigation. The experiment is conducted for two applied voltages 19 kV and 20kV with positive polarity. Several (L/D) ratios are used aiming at picking the appropriate length to achieve highest ionic discharge and maximum pump performance. Results show that the lowest (L/D) ratio gives the best pump performance with highest discharge managed.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

1-8

Citation:

Online since:

June 2015

Export:

Price:

* - Corresponding Author

[1] Yamamoto, T., and Velkoff, H. R. Electrohydrodynamics in an electrostatic precipitator, J. of Fluid Mechanics Vol. 108, 1981, pp.1-18.

DOI: 10.1017/s002211208100195x

Google Scholar

[2] Leger, L., Moreau, E., and Touchard, G. G. Effect of a DC corona electrical discharge on the airflow along a flat plate, Industry Applications, IEEE Transactions on Vol. 38, No. 6, 2002, pp.1478-1485.

DOI: 10.1109/tia.2002.804769

Google Scholar

[3] Moreau, E., Léger, L., and Touchard, G. Effect of a DC surface-corona discharge on a flat plate boundary layer for air flow velocity up to 25m/s, J. of Elect. Vol. 64, 2006, pp.215-225.

DOI: 10.1016/j.elstat.2005.05.009

Google Scholar

[4] Lai, F. C., and Tay, K. Electrohydrodynamically-Enhanced Forced Convection in a Horizontal Channel with Oscillatory Flows, Heat Transfer Engineering Vol. 31, No. 2, 2010, pp.147-156.

DOI: 10.1080/01457630903285427

Google Scholar

[5] Lai, F. C., and Mathew, J. Heat Transfer Enhancement by EHD-Induced Oscillatory Flows, J. of Heat Transfer Vol. 128, No. 9, 2006, p.861.

DOI: 10.1115/1.2241761

Google Scholar

[6] Huang, M., and Lai, F. C. Numerical Study of EHD-Enhanced Forced Convection Using Two-Way Coupling, J. of Heat Transfer Vol. 125, No. 4, 2003, p.760.

DOI: 10.1115/1.1578505

Google Scholar

[7] Lai, F. C. Effects of Buoyancy on Electrohydrodynamic-Enhanced Forced Convection in a Horizontal Channel, J. of Thermophysics and Heat Transfer Vol. 12, No. 3, 1998, pp.431-436.

DOI: 10.2514/2.6355

Google Scholar

[8] Lai, F. C., and Sharma, R. K. EHD-enhanced drying with multiple needle electrode, J. of Elect. Vol. 63, No. 3–4, 2005, pp.223-237.

DOI: 10.1016/j.elstat.2004.10.004

Google Scholar

[9] F. C. L., K. -W. L. EHD-enhanced drying with wire electrode, Drying Technology Vol. 20, No. 7, 2007, p.1393–1405.

DOI: 10.1081/drt-120005858

Google Scholar

[10] Zhang, J., and Lai, F. C. Effect of emitting electrode number on the performance of EHD gas pump in a rectangular channel, J. of Elect. Vol. 69, No. 6, 2011, pp.486-493.

DOI: 10.1016/j.elstat.2011.06.007

Google Scholar

[11] Brown, N. M., and Lai, F. C. Electrohydrodynamic gas pump in a vertical tube, J. of Elect. Vol. 67, No. 4, 2009, pp.709-714.

DOI: 10.1016/j.elstat.2009.03.007

Google Scholar

[12] Tsubone, H., Ueno, J., Komeili, B., Minami, S., Harvel, G. D., Urashima, K., Ching, C. Y., and Chang, J. S. Flow characteristics of dc wire-non-parallel plate electrohydrodynamic gas pumps, J. of Elect. Vol. 66, No. 1–2, 2008, pp.115-121.

DOI: 10.1016/j.elstat.2007.09.002

Google Scholar

[13] Komeili, B., Chang, J. S., Harvel, G. D., Ching, C. Y., and Brocilo, D. Flow characteristics of wire-rod type electrohydrodynamic gas pump under negative corona operations, J. of Elect. Vol. 66, No. 5–6, 2008, pp.342-353.

DOI: 10.1016/j.elstat.2008.02.004

Google Scholar

[14] Rickard, M., Dunn-Rankin, D., Weinberg, F., and Carleton, F. Characterization of ionic wind velocity, J. of Elect. Vol. 63, No. 6–10, 2005, pp.711-716.

Google Scholar

[15] Crowley, J. M., Wright, G. S., and Chato, J. C. Selecting a working fluid to increase the efficiency and flow rate of an EHD pump, Industry Applications, IEEE Transactions on Vol. 26, No. 1, 1990, pp.42-49.

DOI: 10.1109/28.52672

Google Scholar

[16] Steele, W. G., Taylor, R. P., Burrell, R. E., and Coleman, H. W. Use of previous experience to estimate precision uncertainty of small sample experiments, AIAA Journal Vol. 31, No. 10, 1993, pp.1891-1896.

DOI: 10.2514/3.11864

Google Scholar

[17] Birhane, Y., Lin, S., and Lai, F. Effect of Electrode Length on the Performance of EHD Gas Pump, Applied Mechanics and Materials. Vol. 598, Trans Tech Publ, 2014, pp.355-360.

DOI: 10.4028/www.scientific.net/amm.598.355

Google Scholar