Ejector Design Calculation: Xls
Mastering Ejector Design Calculation Using Excel Spreadsheets (.xls): A Complete Engineering Guide
w=mempw equals the fraction with numerator m sub e and denominator m sub p end-fraction
Often incorporates logarithmic terms of the pressure ratios to account for subsonic behavior. Geometric Parameters (Area Ratios) : Calculates cross-sectional areas for: Nozzle Throat ( cap A sub 1 Where motive fluid reaches sonic speed. Nozzle Outlet ( cap A sub 2 Optimized for the expansion to suction pressure. Ejector Throat/Mixing Tube ( cap A sub 3 Where motive and suction fluids combine. Specialized Calculators Steam Jet Ejectors : Professional sheets like those from Graham Corporation ejector design calculation xls
- Know your phase – Gas ejector ≠ liquid ejector ≠ two-phase ejector. Use separate sheets.
- Avoid choked diffuser – Ensure diffuser throat does not choke the mixed flow.
- Use absolute pressures – Always convert gauge pressure to absolute before calculations.
- Check critical pressure ratio – For gases, if ( \fracP_dischargeP_suction > \textcritical ratio ), the ejector may not start properly.
Ready to start?
Download this article as a PDF, open a blank Excel workbook, and begin coding the momentum balance in Section 3. Your first working ejector XLS will be the most enlightening spreadsheet you have ever built. Know your phase – Gas ejector ≠ liquid