๐๏ธ Turbocharger Engine Match & Surge Margin Sizer
Calculate turbocharger turbine-compressor energy balance, compressor pressure ratio PR, engine airflow, turbine exhaust backpressure, surge margin, and shaft RPM.
โก Fortran 90 Engine
Double Precision (IEEE 754)
โ ISO / ASME Validated
Turbomachinery
๐ Solver Telemetry
โ ACTIVE
๐๏ธ Views
19
โก Solves
14
๐พ Downloads
300
๐ฆ Fortran Code
5.2 KB
๐
Released
Jun 2026
โฑ๏ธ Latency
< 1 ms
๐ Compressor Performance Map, Surge Line & Engine Match
Real-time visual simulation: Operating engine load point on PR vs corrected mass flow map๐ Configuration & Presets
๐๏ธ 2.0L Gasoline Sports
๐ 12.8L Truck Turbo Diesel
๐ 2.5L Motorsport High-Boost
โ 6.6L Marine Aux Genset
Turbocharger Matching Formulation:
โข Airflow: แนair = [Vdยท(N/120)ยทฮทvolยทPman] / (RยทTman) [kg/s]
โข Compressor Power: Pcomp = [แนยทcpยทT1 / ฮทc] ยท [PRc(ฮณโ1)/ฮณ โ 1] [kW]
โข Shaft Balance: Pturb ยท ฮทmech = Pcomp
โข Surge Margin: SM = (แนcorr โ แนsurge) / แนcorr โฅ 15%.
โข Airflow: แนair = [Vdยท(N/120)ยทฮทvolยทPman] / (RยทTman) [kg/s]
โข Compressor Power: Pcomp = [แนยทcpยทT1 / ฮทc] ยท [PRc(ฮณโ1)/ฮณ โ 1] [kW]
โข Shaft Balance: Pturb ยท ฮทmech = Pcomp
โข Surge Margin: SM = (แนcorr โ แนsurge) / แนcorr โฅ 15%.
๐ Performance Results
Configure inputs and click Compute to view results.
๐ Calculation Methodology & Turbocharging Standards
Turbocharger Power Match & Shaft Balance
The turbine extracts enthalpy from pulsating engine exhaust gases to drive the compressor wheel through a shared shaft with bearing mechanical losses: $P_{comp} = P_{turb} \cdot \eta_{mech}$.
Surge Margin & Choke Limits
Surge occurs at low mass flow and high boost where aerodynamic stall causes audible high-frequency flow reversal. A minimum 15% margin to the surge line is essential for reliable engine operation.
Key Engineering Assumptions
- SAE J1826 gas stand compressor & turbine mapping.
- 4-stroke IC engine volumetric filling formulation.
- Widely used in automotive powertrain engineering, diesel truck sizing, and marine propulsion.