What it is
Aeroacoustics is the study of sound generated by fluid flow — turbulence, unsteady pressure on surfaces, vortex shedding, and the interaction of rotating blades with the flow around them. The sources are created by the flow — mostly where it meets blades, struts and other surfaces and, at higher speeds, in the turbulence itself — so they respond to velocity, geometry and installation in ways that are easy to underestimate.
Aeroacoustics engineering consulting puts an experienced specialist on the problem. The work starts with what is actually generating the noise and what decision the engineering team needs to make, then applies the level of analysis — engineering estimate, acoustic model, CFD or a combination — that the decision justifies.
Problems it helps solve
- Fans, blowers or air-moving systems that are louder than predicted or than the specification allows
- Tonal noise — a whine or blade-pass tone — with no obvious source
- A design change that unexpectedly made the product louder
- An internal or supplier noise analysis that needs an independent technical review
- Uncertainty about whether a noise problem calls for simulation, testing or a design change
When to use it
- Early in development, while geometry and airflow paths can still change cheaply
- Before committing to tooling, a prototype build or a production release
- When an internal team wants a specialist, independent view of a noise problem
- When a problem spans airflow, acoustics and mechanical design and needs one engineer to connect them
Typical engineering inputs
- A description of the product or system and the noise concern
- Geometry — CAD or drawings at whatever maturity exists
- Operating conditions: flow rates, speeds, pressures, duty points
- Existing test data, recordings, spectra or simulation results
- The acoustic target or requirement the design must meet
Early-stage or incomplete inputs are normal — scoping establishes what is actually needed. Proprietary geometry is shared only after first contact, by a method agreed with you.
How SH Consulting approaches it
- Frame the question. Agree on the decision the work has to support and how the result will be judged.
- Identify the mechanisms. Use the physics, the geometry and any existing data to establish which noise mechanisms are plausible.
- Choose the level of analysis. Match the method — estimate, acoustic model, CFD or a combination — to the question and the budget.
- Analyze and compare. Run the agreed analysis and compare results against the target or the current design.
- Recommend. Translate results into specific, prioritized design actions and next steps.
Outputs
- A written assessment of the dominant noise mechanisms
- Analysis or simulation results scoped to the question
- Ranked design recommendations with the reasoning behind each
- A recommended path forward: further simulation, targeted testing or design iteration
Design decisions it supports
- Which noise source to address first
- Whether a design is likely to meet its acoustic target
- Which of several concepts to carry forward
- Whether a question warrants simulation, physical testing or both
Industries
- Generator Sets & Power GenerationExhaust and intake silencers, enclosures and ventilation paths on engine-driven generator sets.
- Industrial Machinery ManufacturingFan, blower, duct and exhaust noise in machinery where airflow is part of the design.
- Electrical EquipmentCooling-airflow noise in enclosures where cooling performance cannot be compromised.
- Fans, Blowers & Air-Moving EquipmentAn independent view of blade-pass tones and broadband noise in fan and blower designs.
- Filtration, Intake & Exhaust SystemsAttenuation against pressure drop; engine intake and air-filter restriction.
- Commercial HVAC, Air Handling & Data-Center CoolingPlenum and discharge noise; grille, diffuser and louver noise.
Specialty in detail: engine and generator noise simulation
Related services
- Acoustic Modeling & SimulationWhen the question is how sound travels through a silencer, duct or enclosure.
- CFD Flow & Pressure DropWhen the question is the back pressure or flow distribution behind a design.
- Noise Control & MitigationWhen a noise problem is known and the task is choosing the right fix.