Ejector | Design Calculation Xls

ARM = 0.98 * (CR)^(-0.5) * (P_m/P_s)^0.3 ' Approximate – replace with your digitized data

Rm=mmotivemsuctioncap R m equals the fraction with numerator m sub m o t i v e end-sub and denominator m sub s u c t i o n end-sub end-fraction Critical Flow Through the Motive Nozzle ejector design calculation xls

Before diving into spreadsheet formulas, we must establish the core physics. ARM = 0

But wait – if $P_m/P_s$ exceeds the critical pressure ratio (approx 1.89 for air), Mach is >1. Most ejectors operate supersonically (M=1.5 to 4.0). Your XLS should cap Mach using the critical ratio. Mach is &gt

This iteration is easily automated in Excel using or a lookup table.