Where velocity is converted back into pressure (static head) to reach the discharge requirement.
): Use empirical curves or an analytical formulation to determine ERcap E cap R
For gas ejectors, treating air or steam as an incompressible fluid (like water) results in massive errors. The density changes drastically across the nozzle. Ensure your formulas incorporate isentropic expansion relations: $$ T_2 = T_1 \left(\fracP_2P_1\right)^\frac\gamma-1\gamma $$ ejector design calculation xls fixed
Expands the high-pressure steam to supersonic velocities, dropping its static pressure below that of the suction fluid.
In a fixed spreadsheet, avoid =ITERATION or circular references. Use these direct formulas. Where velocity is converted back into pressure (static
Rm=WsWmcap R m equals the fraction with numerator cap W sub s and denominator cap W sub m end-fraction
The XLS calculates the dimensions of the diffuser, where the high-velocity mix converts back into pressure. Troubleshooting Common "Fixed" XLS Issues Rm=WsWmcap R m equals the fraction with numerator
): Find the area required to pass the motive steam at sonic speed (choked flow):