: Briefly mention the theory used. Common models include:
An ejector consists of four main parts:
| 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
Ejectors are passive devices that use high-pressure motive fluid to entrain and compress a lower-pressure suction fluid. This paper details the empirical and analytical formulas required to automate design in Excel, specifically addressing non-choked flow regimes. 1. Nomenclature & Parameters Ejector Design Calculation — Write-up Tab 9: Material