Buradasınız

Anasayfa » Content

KÜRESEL TABANLI FIŞKIRAN BİR YATAĞIN AERODİNAMİĞİ

AERODYNAMICS OF A SPHERICAL BASED SPOUTED BED

Journal Name:

  • Sigma Mühendislik ve Fen Bilimleri Dergisi

Publication Year:

  • 2007

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
The experimental findings belong to the conventional cone based spouted beds show that, the individual particles in the annular part of the bed move vertically downward and radially inward, describing approximately parabolic trajectories. In this study, the shape of the jacket is arranged by conforming to parabolic trajectories of the particles as much as possible for eliminating or decreasing the dead zone. To ensure this, “a cylindrical spouted bed with spherical base” is used as closest shaped one and hydrodynamics of this spouted bed is investigated experimentally. This study includes experimental results of spherical based spouted bed of different materials for various operating parameters (H, U). Effects of bed height (H) and properties of the solid particles on minimum spouting velocity, peak pressure drop and steady spouting pressure drop (onset of spouting) are determined.
Bookmark/Search this post with
Abstract (Original Language): 
Konvansiyonel fışkıran yataklara ait literatürdeki deneysel bulgular, halka kesitli bölgeye düşen her bir parçacığın, aşağı ve içe doğru hareket ederken yaklaşık olarak parabolik bir yol izlediğini göstermektedir. Alışılagelmiş “düz veya konik” tabanlı fışkıran yataklarda, sirkülasyona katılmayan ölü bölgeyi minimuma indirmek amacıyla bu çalışmada, fışkıran yatak gövdesinin tabanı, akışın parabolik seyrine en yakın bir şekilde küresel olarak imâl edilmiştir. Geliştirilen “Küresel Tabanlı Fışkıran Yatak (KTFY)” karakteristikleri hidrodinamik açıdan deneysel olarak incelenmiştir. Çalışma, farklı fiziksel özelliklere sahip malzemelerin küresel tabanlı fışkıran yatakta farklı işletme parametreleri (H, U) ile elde edilen deneysel sonuçlarını içermektedir. H yatak yüksekliğinin ve katı parçacık özelliklerinin minimum fışkırma hızı ile pik noktası ve sürekli rejim basınç düşüleri üzerine etkileri deneysel olarak incelenmiştir.
FULL TEXT (PDF): 
PDF icon arastrmx_845_25_pp_67-75.pdf
  • 1
67-75
  • Turkish

REFERENCES

References: 

[1] Mathur, K.B. and Epstein, N., Spouted Beds, Academic Press, New York, 1974.
[2] Mujumdar, A.S., Spouted bed technology- a brief review, In: A.S. Mujumdar (ed.),
Drying’84, Hemisphere, New York, 193-196, 1984,.
[3] Devahastin, S. and Mujumdar, A.S., Some hydrodynamic and mixing characteristics of a
pulsed spouted bed dryer, Powder technology, 117, 189-197, 2001.
[4] Jumah, R.Y., Mujumdar, A. S. and Raghavan, G.S.V., Aerodynamics of a novel rotating
jet spouted bed, Chemical Engineering Journal, 70, 209-219, 1998.
[5] Devahastin, S., Mujumdar, A.S. and Raghavan, G.S.V., Hydrodynamic characteristics of
a rotating jet annular spouted bed, Powder Technology, 103, 169–174, 1999.
[6] Olazar, M., San Jose, M.J., Izquierdo, M.A., Salazar, A.O. and Bilbao,J., Effect of
operating conditions on solid velocity in the spout, annulus and fountain of spouted beds,
Chemical Engineering Science, 56, 3585-3594, 2001.
[7] Freitas, L.A.P. and Freire, J.T, Experimental study on the dynamics of a spouted bed with
particle feed through the base, Braz. J. Chem. Eng., vol. 14, no. 3, 1997.
[8] Swaminathan, R. and Mujumdar, A.S., Some aerodynamic aspects of spouted beds of
grains, In: A.S. Mujumdar (ed.), Drying ’84, Hemisphere, New York, 193-196, 1984.
[9] Olazar, M. and Jose, M.J.S., Aguayo, A.T., Arendes, J.M., Bilbao, J., Stable operation
conditions for gas-solid contact regimes in conical spouted beds, Ind. Eng. Chem. Res.,
31, 1784-1792, 1992.
[10] Olazar, M., Alvarez, R., Aguado, R. and Jose, M.J.S. Spoted bed reactors, Chem. Eng.
Technol., 26, 8, 845-852, 2003.
[11] Jing, S., Hu, Q., Wang, J. and Jin, Y., Fluidization of coarse particles in gas-solid conical
beds, Chemical Engineering and Processing, 39, 379-387, 2000.
[12] Ishikura, T., Nagashima, H. and Ide, M., Hydrodynamics of a spouted bed with a porous
draft tube containing a small amount of finer particles, Powder technology, 131, 56-65,
2003.
[13] He, Y.-L., Lim, C.J. and Grace, J.R., Scale up studies of spouted beds, Chem. Eng.
Science, 52, 2, 329-339, 1997.

Thank you for copying data from http://www.arastirmax.com