Tag Archives: PowerFLOW

Aeroacoustic simulation delivers breakthroughs in aircraft noise reduction

Simulated radiated sound field from a full-scale business jet during landing with flaps and main landing gears deployed. Credit: NASA Langley Research Center

Aircraft manufacturers face increasingly stringent standards for reducing community noise. Conventional aircraft development methods based on engineering experience, past designs and flight testing will not suffice to meet future noise reduction targets. Computational fluid dynamics (CFD) software based on so-called Reynolds-averaged Navier-Stokes (RANS) methods has revolutionized aircraft aerodynamics engineering, but is insufficient for high-fidelity aeroacoustic simulation. However, the Lattice-Boltzmann-based technology of Exa Corporation’s PowerFLOW software provides aeroacoustic simulation accuracy comparable to wind tunnels and flight testing. Today, PowerFLOW’s unique value and benefits for aeroacoustic simulation are being proven in practice by NASA, Embraer and others deploying the software to achieve breakthroughs in aircraft noise prediction and mitigation. Download the white paper to continue reading

Aerodynamic optimization: Automotive engineering’s next strategic frontier

Source: Exa

With the unprecedented demands on today’s vehicle engineering organizations, auto makers face a daunting challenge to reach their next targets for aerodynamics drag using traditional tools and methods. Trial-and-error development using wind tunnel testing achieved a coefficient of drag of 0.3. Introducing digital simulation to sequentially improve designs brought CD down to 0.24 for today’s best performing cars. But most companies have the next target set to 0.2. Without either a radical increase in time and resources—not a realistic solution for most—or else a radically more efficient and effective approach to aerodynamics engineering, this target will remain all but out of reach. Continue reading