Model & approach
- Build a simplified CAD model of the powerpack
- Compare airflow, pressure loss and temperature distribution
- Evaluate cooler inlets/outlets and possible recirculation
Project / Rail engineering
Rail powerpack: cooling across operating conditions
Pressure, velocity and temperature fields were compared at standstill and in motion to assess cooling paths and recirculation.
Engineering question
The cooling system of an enclosed power unit had to work at standstill and under vehicle-motion conditions.
Boundary conditions
- Standstill and motion as separate operating conditions
- Multiple coolers within a complex enclosure
- System-level flow and thermal result fields
Results of the assessment
- The operating conditions produced different airflow paths.
- Pressure loss and airflow had to be assessed together.
- One archived stage identified recirculation above the coolers and recommended further investigation.
Additional project view
Engineering consequence
The assessment focused subsequent work on air paths, pressure loss and recirculation zones.
Context
The published articles provide no quantitative temperature or pressure limits and no measurement correlation.
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