TY - JOUR
TI - Pressure drop and stability of flow in Archimedean spiral tube with transverse corrugations
AU - Đorđević Milan Lj
AU - Stefanović Velimir P
AU - Mančić Marko V
JN - Thermal Science
PY - 2016
VL - 20
IS - 2
SP - 579
EP - 591
PT - Article
AB - Isothermal pressure drop experiments were carried out for the steady  Newtonian fluid flow in Archimedean spiral tube with transverse corrugations.  Pressure drop correlations and stability criteria for distinguishing the flow  regimes have been obtained in a continuous Reynolds number range from 150 to  15 000. The characterizing geometrical groups which take into account all the  geometrical parameters of Archimedean spiral and corrugated pipe has been  acquired. Before performing experiments over the Archimedean spiral, the  corrugated straight pipe having high relative roughness e/d = 0.129 of  approximately sinusoidal type was tested in order to obtain correlations for  the Darcy friction factor. Insight into the magnitude of pressure loss in the  proposed geometry of spiral solar receiver for different flow rates is  important because of its effect upon the efficiency of the receiver. Although  flow in spiral and corrugated geometries has the advantages of compactness  and high heat transfer rates, the disadvantage of greater pressure drops  makes hydrodynamic studies relevant. [Projekat Ministarstva nauke Republike  Srbije, br. III 42006 i br. TR 33015]