Ship Engine Room Ventilation System

Engine Room Ventilation System of a Ship — ANSYS Fluent CFD Simulation

Description

This project presents a complete CFD simulation of a ship's engine room ventilation system — one of the most critical thermal-management challenges in marine engineering. Engine rooms house compressors, pumps, fans, diesel engines, and electric motors, all packed into a confined space and all generating significant heat. Without proper ventilation, equipment overheats, efficiency drops, and safety risks rise. In this project, you'll use ANSYS Fluent to simulate how injected cool air at 300 K distributes through the engine room and removes heat from the operating machinery, allowing you to evaluate ventilation effectiveness and identify hot spots. As the opening project of the Marine Engineering: Beginner CFD Training Package, it introduces the CFD workflow through a self-contained internal-airflow problem in a familiar marine setting.

Methodology

The 3D engine room geometry is imported and prepared in SpaceClaim, then meshed in ANSYS Meshing with an unstructured grid of roughly 706,000 cells to resolve the complex internal flow domain and its multiple equipment volumes. The energy equation is activated to capture the heat transfer, and the machinery is modeled as distributed heat generators through volumetric heat sources defined in the cell-zone conditions — 12,500 W/m³ for the diesel engines and 8,333.33 W/m³ for the electric motors. The marine-specific boundary conditions comprise a mass-flow inlet supplying 35 kg/s of air at 300 K and dual pressure outlets for natural exhaust. Appropriate turbulence and solver settings are chosen for this internal forced-convection ventilation problem.

Analysis

Post-processing produces temperature, velocity, and pressure contours, along with streamlines and velocity vectors that show how the cool air reaches the hot equipment surfaces. From these results you can evaluate ventilation effectiveness — identifying whether the cool air actually reaches the hottest machinery zones and where hot spots remain. The same CFD workflow built here — volumetric heat sources, forced ventilation, and internal recirculation — applies directly to engine rooms in submarines, ferries, cargo vessels, and offshore platforms, as well as to data centers and industrial machinery enclosures on land. By the end of this project, you'll be able to set up an internal forced-convection ventilation simulation, model machinery as volumetric heat sources, and interpret the flow and temperature fields to assess how effectively a confined marine space is cooled.