Ejector Design Calculation Xls

For 95% of industrial sizing (steam jets, air ejectors, single-phase gas), an XLS is sufficient for preliminary and even detailed design.

| Sheet Name | Content | |------------|---------| | | Operating fluids, pressures, temperatures, mass flow rates | | Fluid Properties | Gas constant, specific heat ratio, saturation tables (if steam) | | Nozzle Calc | Motive nozzle throat & exit diameters, Mach number | | Suction Calc | Suction mass flow capacity | | Mixing & Shock | Momentum balance, shock Mach, pressure rise | | Diffuser | Final discharge pressure, efficiency | | Results | Entrainment ratio, area ratio, performance curves | | Charts | ω vs. compression ratio, parametric sweeps | ejector design calculation xls

Ensure all pressures are converted to Pascals ( ) and temperatures to Kelvin ( For 95% of industrial sizing (steam jets, air

Ejector performance is typically calculated using the following variables: Entrainment Ratio ( is a notable example used by SpaceX, Hatch,

For those who need even more functionality, several standalone ejector software packages exist. is a notable example used by SpaceX, Hatch, Veolia and other major engineering firms. It can perform rigorous steam and gas ejector design calculations based on fundamental thermodynamic principles and has been extensively validated against actual installations. Other commercial options include the IHS ESDU Ejectors and Jet Pumps program (94046 for steam/gas, 93022 for liquid flow), which can optimise the primary nozzle and exit dimensions, as well as predict flow conditions throughout the ejector.

Using Excel’s function, the designer can sweep: