This is why the search for an is one of the most common queries on engineering forums. Engineers are tired of floating macros, broken iterative loops, and unprotected cells. They want a fixed —meaning stable, validated, and non-crashing—spreadsheet.
, specific constants (A through J) are used in empirical correlations to determine Non-Choked Flow: For compression ratios is less than 1.8 , a different set of constants is applied. Motive Mass Flow Rate: For a fixed nozzle, the mass flow rate ( ejector design calculation xls fixed
, where the geometry is optimized for a specific design point (MDP - Motive Design Pressure). It utilizes high-velocity steam (motive fluid) to entrain and compress a lower-pressure gas (suction fluid). 2. Input Parameters (Data Entry) This is why the search for an is
To build or use an effective calculation sheet, you must account for several critical variables: 1. Suction Conditions (The "Load") You need to define what you are pulling. This includes: Usually expressed in kg/hr or lb/hr. Suction Pressure: The vacuum level required. , specific constants (A through J) are used
: $$A_t = \frac\dotm_mP_m \times \frac1C_d \times \sqrt \fracR T_mk \left( \frack+12 \right)^\frack+1k-1 $$ Excel Formula (assuming $R=8314/M_m$ and $C_d = 0.95$): =(B11/B2) * (1/0.95) * SQRT( ( (8314/B7)*B5 / B9 ) * ((B9+1)/2)^((B9+1)/(B9-1)) )