Xls Fixed — Ejector Design Calculation

In supersonic ejectors, "choking" can occur at the nozzle exit AND the mixing throat. A robust calculation sheet must check for Mach 1.0 at both locations. If the spreadsheet ignores choking at the secondary inlet, it will over-predict suction flow capacity.

Are the formula cells permanently locked and password protected , leaving only the Input Panel fields editable? (This keeps the XLS "fixed" and safe from accidental corruption).

If the Excel model indicates a Mach number of less than 1.0 at the nozzle exit, the motive steam pressure is too low to achieve supersonic flow. The spreadsheet should be programmed with conditional formatting ( IF statements) to flag "Subsonic Flow Error" if Pmcap P sub m drops below the critical pressure threshold. The "Break" Point ejector design calculation xls fixed

Vm=2⋅ΔHisencap V sub m equals the square root of 2 center dot cap delta cap H sub i s e n end-sub end-root is the isentropic enthalpy change ( ) from motive pressure ( Pmcap P sub m ) to the suction chamber pressure ( Pscap P sub s Step 2: Entrainment Ratio Calculation The mass ratio of suction fluid ( ) to motive fluid ( ) is calculated using critical pressure relationships:

Before building a spreadsheet, it is crucial to understand the governing physical laws that must be encoded within it. In supersonic ejectors, "choking" can occur at the

Em=MWactualMWair⋅TairTactualcap E m equals the square root of the fraction with numerator cap M cap W sub a c t u a l end-sub and denominator cap M cap W sub a i r end-sub end-fraction end-root center dot the square root of the fraction with numerator cap T sub a i r end-sub and denominator cap T sub a c t u a l end-sub end-fraction end-root 4. Step-by-Step Architecture for your XLS Spreadsheet

: A specific technical tool from Inter.net designed for Lempor ejectors used in steam locomotives, solving complex flow equations through iterative trial-and-error. ⚙️ Key Design Formulas Ejector design often relies on the Entrainment Ratio ( ERcap E cap R Are the formula cells permanently locked and password

Do you require (bar, kg/h, °C) or US Customary units (psig, lb/h, °F)? Share public link

A robust Excel workbook must separate hardcoded physical constants from variable operating parameters. Structure your tabs using the framework below: Function / Contents 1. Cover & Readme

An ejector, sometimes called an eductor or jet pump, is a device that uses the Venturi effect to move, compress, or mix fluids. It consists of a converging-diverging nozzle (often operating at supersonic speeds), a suction chamber, a mixing throat section, and a diffuser. High-pressure motive fluid (steam, gas, or liquid) accelerates through the nozzle, creating a low-pressure region that draws in a secondary suction fluid. The two streams mix in the throat, and the diffuser then decelerates the mixture to recover pressure.