Ejectors (or jet pumps) are passive fluid handling devices that use a high-pressure motive fluid to entrain and compress a secondary fluid. Their design involves iterative thermodynamic and fluid dynamic calculations. This paper presents a systematic methodology for ejector design calculation implemented in Microsoft Excel (XLS). The spreadsheet tool integrates key design parameters: entrainment ratio, area ratios, Mach number constraints, and pressure recovery. Validation against literature data shows agreement within ±5% for critical operating points. The tool enables rapid parametric studies without specialized software.
$$P_discharge = P_throat + \eta_d \cdot \frac12 \rho_m (V_2^2)$$ ejector design calculation xls
The humble is an extraordinarily capable platform for ejector design calculation. By combining thermodynamic property tables, empirical area-ratio correlations, momentum balances, and iterative solvers, you can create a .xls file that rivals dedicated software – with the added advantages of transparency, customizability, and zero licensing cost. Ejectors (or jet pumps) are passive fluid handling
An is a practical, lightweight tool for engineers to quickly size ejectors for gases, vapors, or liquids. While not a replacement for rigorous simulation, it provides reliable first estimates, facilitates design reviews, and serves as an excellent teaching aid. For final detailed engineering, manufacturer validation and CFD are still recommended. $$P_discharge = P_throat + \eta_d \cdot \frac12 \rho_m
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