Browse > Article

Study on Velocity Measurement and Numerical Computation in a Rectangular Duct with $90^\circ$ Bend Elbow  

윤영환 (창원대학교 기계공학과)
박원구 (창원대학교 기계공학과)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.15, no.11, 2003 , pp. 910-917 More about this Journal
Abstract
Fluid flow in a rectangular duct for 90$^{\circ}$ bend elbow with the ratio of 1.5 between its curvature radius and width is measured by 5 W laser doppler velocity meter. The fluid flow is also computed by commercial software of STAR-CD for comparison between measured and computed velocity profiles in the duct. Reynolds numbers for the comparison are 11,643, 19,746 and 24,260. From the comparison, computation of principal velocity components in the duct predicts the experimental data somewhat satisfactorily even though those of minor velocity components and turbulent kinetic energy do not match with the experimental data quite well. K-factor for the bend elbow is computed to be average 0.086 while the equivalent ASHRAE data is 0.07.
Keywords
$90^\circ$ Rectangular bend elbow; Laser doppler velocity meter; Three dimensional numerical computation; Turbulent flow;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 /
[] / ASHRAE Hand book
2 Methodology v3.10 /
[] / Star-CD
3 Accuracy of CFD for predicting pressure losses in HVAC duct fitting /
[ Shao,L.;Riffat,S.B. ] / Applied Energy   ScienceOn
4 The numerical study of a 3D curved duct flow by incompressible Navier Stokes code /
[ Shin,B. ] / Journal of Korean Society for Aeronautical & Space Sicences   과학기술학회마을
5 Velocity measurement in a rectanglular duct with 90° mitered elbow /
[ Yoon,Y.H.;BaemT.H.;Park,W.G. ] / Korean Journal of Air-Conditioning and Refrigeration Engineering   과학기술학회마을
6 User Guide v3.10 /
[] / Star-CD
7 /
[ Wirt,L. ] / General Electric Rev.
8 A Study on turbulence models for the analysis of 3-dimensional flow /
[ Kim,H.M.;Kim,K.Y. ] / Proceedings of the SAREK, Winter Annual Conference(Ⅰ)
9 Flow modeling of flat oval ductwork elbows using computational fluid dynamics /
[ Mahank,T.A.;Mumma,S.A. ] / ASHRAE Transactions: Resaerch
10 Numerical analysis of turbulent flow and heat transfer in a rectangular duct with a 180° bend degree /
[ Choi,Y.D.;Moon,C. ] / Korean Journal of Air-Conditioning and Refrigeration Engineering
11 Prediction of thermal stratification in a curved duct with 3D body fitted co-ordinate /
[ Ushijama,S. ] / International Journal for Numerical Methods in Fluids   ScienceOn