Title of article :
Effects of Feeding Mode and Inlet Area Ratio on Heating Characteristics in Dual-Inlet Swirl Tubes
Author/Authors :
Xu ، X. School of Mechanical and Power Engineering - East China University of Science and Technology , Wang ، J. School of Mechanical and Power Engineering - East China University of Science and Technology , Yang ، Q. State Key Laboratory of Chemical Engineering - East China University of Science and Technology , Liu ، H. State Key Laboratory of Chemical Engineering - East China University of Science and Technology , Wang ، H. State Key Laboratory of Chemical Engineering - East China University of Science and Technology
Abstract :
A preheating exchanger is developed for improving acidic water degassing. Reasonable optimization of dualinlet swirl heating tubes is analyzed by computations of the flow and heat transfer. The comparisons of the swirl number and circumferential average Nusselt number between isobaric injection and isokinetic injection are performed. Inlet area ratios ranging from 0.1 to 0.9 exhibit an important influence on the flow phenomena and the heating performance. A lower value of inlet area ratio leads to the tendency for the fluid passing through inlet 2 to move upstream of inlet 2 and results in more vortex pairs between inlets 1 and 2. An inlet area ratio value of 0.5 exhibits the largest global average Nusselt number, normalized Nusselt number, and thermal performance factor. The optimized inlet area ratio is suitable for improving the degassing efficiency.
Keywords :
Preheating degassing , Dual , inlet swirl , Flow and heat transfer , Numerical simulations
Journal title :
Journal of Applied Fluid Mechanics (JAFM)
Journal title :
Journal of Applied Fluid Mechanics (JAFM)
