Xls Fixed — Ejector Design Calculation

Fixed, locked formulas protect against incorrect inputs or accidental formula changes.

Before trusting the output, your model must be validated. Test the spreadsheet against:

This step involves translating the physics into spreadsheet formulas. A one-dimensional model is used, as it is a balance of accuracy and complexity. ejector design calculation xls fixed

Calculated based on critical flow conditions for compressible fluids:

= (B6 / B4) * SQRT((B11 * B5) / (B10 * B12 * (2 / (B10 + 1)) ^ ((B10 + 1) / (B10 - 1)))) Nozzle Throat Diameter ( Dtcap D sub t = SQRT((4 * B22) / PI()) * 1000 Fixed, locked formulas protect against incorrect inputs or

This technical guide breaks down the physics of fixed-geometry ejector design, outlines the step-by-step mathematical model required for an XLS calculator, and provides troubleshooting steps to fix broken formulas and convergence loops. 1. Fundamental Physics of Fixed-Geometry Ejectors

Download a trial of a fixed ejector calculation template (PDF preview available) and input your operating conditions. Verify that the entrainment ratio matches your existing ejector performance curve. If it does, you have found your permanent design tool. A one-dimensional model is used, as it is

If you want to expand this layout, consider writing a short to automate fluid property lookup from water-steam tables (IAPWS-IF97), ensuring your fixed sheet handles superheated steam regions automatically. AI responses may include mistakes. Learn more Share public link

(isentropic efficiency) are realistically tuned.

): Typically . Accounts for momentum transfer losses when streams collide. Diffuser Efficiency ( ηdeta sub d

Vm=2⋅ηn⋅(kk−1)⋅R⋅Tm⋅[1−(PsPm)k−1k]cap V sub m equals the square root of 2 center dot eta sub n center dot open paren the fraction with numerator k and denominator k minus 1 end-fraction close paren center dot cap R center dot cap T sub m center dot open bracket 1 minus open paren the fraction with numerator cap P sub s and denominator cap P sub m end-fraction close paren raised to the the fraction with numerator k minus 1 and denominator k end-fraction power close bracket end-root ηneta sub n : Nozzle efficiency (typically 0.94 to 0.97) : Isentropic exponent (Specific heat ratio, : Specific gas constant ( Tmcap T sub m : Motive temperature (Kelvin) Critical Nozzle Throat Area ( Atcap A sub t For choked, supersonic flow (which occurs when