ESDU 81021 provides a means of estimating pressure losses caused by bluff obstructions in pipe and duct systems@ such as a pipe crossing a duct@ an instrumentation housing projecting into a pipe or equipment obstructing a mine gallery. The data cover bluff bodies of flat plate@ wedge@ rectangular block or circular-cylindrical sections in ducts or pipes of all cross-sections@ for liquid flow and incompressible gas flow. An Appendix briefly discusses the derivation of@ and causes of uncertainty in@ the data.
ESDU 81021 A-2007 history
2007ESDU 81021 A-2007 Pressure losses caused by obstructions in ducts or pipes.