Model & approach
- Steady models for vehicle movement and standstill
- Several transient fire scenarios represented as separate load cases
- Time-dependent temperature evaluation at detector locations
Project / Rail & safety
Locomotive fire detectors: transient flow and thermal assessment
Normal operation and defined fire scenarios were modeled to assess temperature histories at detector locations.
Engineering question
The study examined whether the proposed detector locations registered a temperature rise across different operating and fire scenarios.
Boundary conditions
- Steady reference states and transient fire scenarios
- The original project report references EN 50553
- Flow velocity evaluated as an additional influencing quantity
Results of the assessment
- Several detector locations responded to the temperature rise in the assessed scenarios.
- High local velocities remained confined to the immediate fan region.
- The steady cases established the normal-operation thermal baseline.
Engineering consequence
The assessment supported evaluation of the detector arrangement for the modeled scenarios.
Context
The study assessed the simulation model. Formal release follows the test and evidence route defined for the project.
Related projects
RailCFD simulation
Locomotive aerodynamics
Whole-vehicle and cab-front accounts were consolidated into an aerodynamic variant study.
View project
RailCFD simulation
Driver-cabin thermal comfort
A transient thermal-flow analysis assessed heating, cooling and temperature distribution in a driver cabin under extreme ambient conditions.
View project
RailCFD simulation
Rail-powerpack cooling
Pressure, velocity and temperature fields were compared at standstill and in motion to assess cooling paths and recirculation.
View projectA similar question?