Ejector Design Calculation Xls Fixed Jun 2026

) is calculated using the critical flow equation for compressible fluids:

The "Fixed" version of this calculation sheet refers to an ejector with a non-adjustable nozzle position

meq=msFMW⋅FTm sub e q end-sub equals the fraction with numerator m sub s and denominator cap F sub cap M cap W end-sub center dot cap F sub cap T end-fraction Estimate Entrainment Ratio ( ERcap E cap R ejector design calculation xls fixed

A diverging section that converts the kinetic energy of the mixture back into pressure (potential energy) for discharge. Essential Design Parameters

: $$A_t = \frac\dotm_mP_m \times \frac1C_d \times \sqrt \fracR T_mk \left( \frack+12 \right)^\frack+1k-1 $$ Excel Formula (assuming $R=8314/M_m$ and $C_d = 0.95$): =(B11/B2) * (1/0.95) * SQRT( ( (8314/B7)*B5 / B9 ) * ((B9+1)/2)^((B9+1)/(B9-1)) ) ) is calculated using the critical flow equation

At=mmPm⋅R⋅Tmγ⋅M⋅(2γ+1)γ+1γ−1cap A sub t equals the fraction with numerator m sub m and denominator cap P sub m end-fraction center dot the square root of the fraction with numerator cap R center dot cap T sub m and denominator gamma center dot cap M center dot open paren the fraction with numerator 2 and denominator gamma plus 1 end-fraction close paren raised to the the fraction with numerator gamma plus 1 and denominator gamma minus 1 end-fraction power end-fraction end-root is the universal gas constant and is the molecular weight. Step 4: Size the Diffuser Throat ( Adcap A sub d

A "fixed" calculation sheet typically follows these logical steps: Entrainment Ratio ( Ercap E sub r The section where the high-velocity primary fluid and

Because fixed-geometry ejectors break down off-design, this tab uses Excel Data Tables to plot how changes in discharge pressure affect the entrainment ratio.

The section where the high-velocity primary fluid and lower-velocity secondary fluid mix. Throat Section: