Non-Circular Duct Flow Calculations
Flow through non-circular duct calculations including incompressible flow and compressible flow for flow through an annulus, rectangular duct and general non-circular duct.
These Excel spreadsheets calculate the head loss and pressure drop for flow of a liquid through an annulus, or a rectangular duct or a general non-circular duct. There are separate worksheets to calculate pressure drop/head loss or flow rate for each of the three non-circular duct configurations. The worksheets for flow through an annulus and for flow through a rectangular duct can handle either laminar flow or turbulent flow calculations. The general non-circular duct worksheets are useable only for turbulent flow. Calculations are in U.S. units.
These Excel spreadsheets calculate the head loss and pressure drop for flow of a liquid through an annulus, or a rectangular duct or a general non-circular duct. There are separate worksheets to calculate pressure drop/head loss or flow rate for each of the three non-circular duct configurations. The worksheets for flow through an annulus and for flow through a rectangular duct can handle either laminar flow or turbulent flow calculations. The general non-circular duct worksheets are useable only for turbulent flow. Calculations are in S.I. units.
This Excel spreadsheet makes compressible flow (Fanno Flow) calculations for gas flow through a non-circular duct. There are worksheets for laminar or turbulent flow through an annulus, laminar or turbulent flow thru a rectangular duct and for turbulent flow through a nonicircular duct in general. For each of these,the frictional pressure drop can be found for specified gas flow rate, pipe diameters (or duct dimensions) and length, surfaace roughness, and inlet gas temperature and pressure. Also, flow rate can be determined for specified pressure drop. Each of the worksheets calculates the conditions for "choked" flow to show the limits for user input parameters. Needed gas properities are available in the Excel workbook for 23 gases (acetylene, air, ammonia, argon, carbon dioxide, carbon monoxide, chlorine, ehtane, ethylene, helium, hydrogen, hydrogen chloride, hydrogen sulphide, krypton, methane methyl chloride, neon, nitric oxide, nitrogen, nitrous oxide, oxygen, sulphur dioxide, and xenon. Also the user may enter gas properties for any other gas. Calculations are in U.S. units.
This Excel spreadsheet makes compressible flow (Fanno Flow) calculations for gas flow through a non-circular duct. There are worksheets for laminar or turbulent flow through an annulus, laminar or turbulent flow thru a rectangular duct and for turbulent flow through a nonicircular duct in general. For each of these,the frictional pressure drop can be found for specified gas flow rate, pipe diameters (or duct dimensions) and length, surfaace roughness, and inlet gas temperature and pressure. Also, flow rate can be determined for specified pressure drop. Each of the worksheets calculates the conditions for "choked" flow to show the limits for user input parameters. Needed gas properities are available in the Excel workbook for 23 gases (acetylene, air, ammonia, argon, carbon dioxide, carbon monoxide, chlorine, ehtane, ethylene, helium, hydrogen, hydrogen chloride, hydrogen sulphide, krypton, methane methyl chloride, neon, nitric oxide, nitrogen, nitrous oxide, oxygen, sulphur dioxide, and xenon. Also the user may enter gas properties for any other gas. Calculations are in S.I. units.