Calculating the velocity of the motive fluid as it exits the nozzle (often reaching supersonic speeds).
A robust spreadsheet typically follows these sequential calculations: Key Formula/Logic Compression Ratio ( CRcap C cap R ) Assess performance feasibility 2 Expansion Ratio ( ERcap E cap R ) Determine motive energy 3 Entrainment Ratio ( ) Calculate suction capacity (Use semi-empirical constants A–H) 4 Nozzle Sizing Find throat ( A1cap A sub 1 ) & outlet area ( A2cap A sub 2 and isentropic expansion 5 Mixing & Diffuser Find mixing diameter ( A3cap A sub 3 Function of combined mass flow and Pccap P sub c 3. Critical Formulas for Excel Use these semi-empirical equations (valid for ) in your cells: Entrainment Ratio ( ): Constants (approximate): Nozzle Throat Area ( A1cap A sub 1 ): 4. Implementation Resources
If you want, I can:
Add a Monte Carlo simulation using =NORM.INV(RAND(), mean, stdev) on input parameters (e.g., pressure transmitters have ±1% error). Calculate the 90% confidence interval for actual ṁ_s.
Ejector Design Calculation Xls [ QUICK ]
Calculating the velocity of the motive fluid as it exits the nozzle (often reaching supersonic speeds).
A robust spreadsheet typically follows these sequential calculations: Key Formula/Logic Compression Ratio ( CRcap C cap R ) Assess performance feasibility 2 Expansion Ratio ( ERcap E cap R ) Determine motive energy 3 Entrainment Ratio ( ) Calculate suction capacity (Use semi-empirical constants A–H) 4 Nozzle Sizing Find throat ( A1cap A sub 1 ) & outlet area ( A2cap A sub 2 and isentropic expansion 5 Mixing & Diffuser Find mixing diameter ( A3cap A sub 3 Function of combined mass flow and Pccap P sub c 3. Critical Formulas for Excel Use these semi-empirical equations (valid for ) in your cells: Entrainment Ratio ( ): Constants (approximate): Nozzle Throat Area ( A1cap A sub 1 ): 4. Implementation Resources ejector design calculation xls
If you want, I can:
Add a Monte Carlo simulation using =NORM.INV(RAND(), mean, stdev) on input parameters (e.g., pressure transmitters have ±1% error). Calculate the 90% confidence interval for actual ṁ_s. Calculating the velocity of the motive fluid as