"A Procedure for Predicting Pressure Loss Coefficients of Duct Fittings Using Computa- tional Fluid Dynamics (RP-1493)." HVAC&R Research 18 (6): 1168-1181.Liu W,Long Z,Chen Q.A procedure for predicting pressure loss coefficients of duct fittings using CFD(RP-1493)[J].HVAC&R Research,...
Minor loss coefficients for commonly used pipe and tube system components: Pipe and Tube System Fittings - Minor (Dynamic) Loss Coefficients Type of Component or Fitting Minor Loss Coefficient - ξ - Tee, Flanged, Dividing Line Flow 0.2 Tee, Threaded, Dividing Line Flow 0.9 Tee, Flanged, Divid...
This did not allow you to sum loss coefficients for a section because thejunction losswould be referenced to the upstream section's velocity pressure, while the rest of the fittings were referenced to the velocity pressure in the section. ...
What are Some Good Online References for Head Loss Coefficients in Ductwork? I am working on a project at my summer internship rerouting some duct work and want to do some calculations to see how much changing some of the 90 degree angles in the duct will improve flow. I don't have my...
Pressure drop diagrams for PTFE, PP, PFA and PVDF lined pipes. Pipe and Tube System Components - Minor (Dynamic) Loss Coefficients Minor loss coefficients for components used in pipe and tube systems. Plastic Pipes - Friction Head Loss vs. Water Flow ...
Table of Minor Loss Coefficients(K has no units) FittingKFittingK Valves:Elbows: Globe, fully open10Regular 90°, flanged0.3 Angle, fully open2Regular 90°, threaded1.5 Gate, fully open0.15Long radius 90°, flanged0.2 Gate 1/4 closed0.26Long radius 90°, threaded0.7 ...
8.6.2.1 Local loss coefficients In dynamically similar flow streams, a dimensionless coefficient (C) has the same value and is therefore a useful parameter in the analysis of flow resistance. The fluid resistance coefficient is the ratio of total pressure loss to velocity pressure at the cross se...
Analytical determination of duct fitting loss-coefficients. Appl Energ 1998;61(4):224-9.S. A. Mumma, T. A. Mahank, and Y.-P. Ke, "Analytical determi- nation of duct fitting loss-coefficients," Applied Energy, vol. 61, no. 4, pp. 229-247, 1998....
These fittings cause losses and these losses play a significant role in the total pressure loss in a duct system. Numerical simulations were performed using Fluent on laminar flows in a circular pipe to obtain pressure loss coefficients associated with different fittings of two elbows and three ...
The aspect ratio for both main and branch ducts was varied from 2.2 to 3.8 using combinations of three main duct sizes and four branch duct sizes. A logarithmic model was used to correlate branch and main loss coefficients as functions of branch-to-common and main-to-common flow rate ratio...