The Role of Simulation in Defense Fan Development

Aerodynamic design for Perseus cooling fans begins in the simulation environment before a physical prototype is produced. Impeller blade geometry, airflow-channel profiles, inlet restrictions, outlet paths, and housing interactions are reviewed computationally so high-risk design issues can be identified before tooling and test resources are committed.

For defense and aerospace electronics, fan development is constrained by SWaP targets, qualification schedules, acoustic limits, and enclosure impedance. Simulation-led development reduces the risk of discovering a fundamental aerodynamic limitation during wind tunnel testing or during system integration.

What CFD Analysis Covers

• Blade profile optimization: reviewing blade angle, chord, and loading to improve static-pressure capability within the available impeller diameter.

• Flow-channel geometry: evaluating inlet clearance, housing tolerance, outlet diffusion, and guide-channel structure to reduce turbulence losses.

• Aerodynamic noise risk: identifying blade-passing frequency (BPF) contributors and broadband turbulence sources before acoustic testing.

• Altitude and density effects: modeling reduced-air-density conditions for airborne platforms where sea-level P-Q data alone is not sufficient.

From Simulation to Physical Verification

CFD results define the target geometry that enters wind tunnel testing. Wind tunnel P-Q measurement then validates the simulation prediction and provides the definitive performance data used for customer thermal modeling. Where simulation and measurement diverge, the difference informs the next design iteration.

This simulation-to-test workflow is especially useful for custom fan programs where the customer's enclosure impedance, altitude profile, acoustic target, and voltage interface must be reviewed before hardware is finalized.