Air conditioning systems - Import export

Actran TM A powerful acoustic CAE tool for turbomachinery noise prediction Actran TM is the reference CAE tool for analyzing the sound radiated by turbo machines and for optimizing the related acoustic treatments. Actran TM is used extensively by many leading aerospace companies that rely on the tools’ accuracy, ease-of-use and performance for reaching their strategic acoustic design goals. Actran TM contains all advanced modeling features required for turbo machinery noise analysis. To capture the important convection and refraction effects, the sound waves propagate on top of a non-uniform background mean flow which can be calculated by Actran or imported from a CFD simulation. The influence of the mean flow on the performance of acoustic liners is accounted for thanks to the Myers boundary condition. The acoustic source is defined in terms of incident duct modes of arbitrary order and their amplitude can be defined in a variety of ways (e.g. normalized amplitude, intensity, equal distribution of energy on all propagating modes) or derived from pressure fluctuations calculated on a set of planes by one of the supported CFD tools. Both 3D and axisymmetric models can be defined. One of the challenges of acoustic CAE is to handle large models associated to high wave number and to large geometrical size and complexity. Actran TM meets this challenge thanks to its efficient solver technology that includes advanced parallel processing. Actran TM is used not only for optimal aircraft engine nacelle liner design but also on inlet and outlet liners for helicopter turbines, environmental control systems (ECS) or auxiliary power unit (APU). Actran TM is also used for non aerospace applications like computer cooling system noise and more. Actran TM can be complemented by Actran DGM to solve problems involving complex shear layers and flow gradients occurring at the engine exhaust. Model courtesy of Alenia Aermacchi™ Target Applications: Aircraft engine noise, including nacelle design Ducted cooling systems (electronic devices) Blower systems (air conditioning modules) Helicopter turbine noise

Acoustics Rich and powerful acoustic features for your simulation needs Actran Acoustics is the foundation module of the Actran family and is both a standalone tool and a pre-requisite for advanced modules like Actran VibroAcoustics, Actran AeroAcoustics or Actran TM. Actran Acoustics contains a wide set of acoustic modeling features making it the CAE tool of choice for simulating a large variety of problems, from the simplest component to the most elaborate system. The Actran Acoustics product relies on Free Field Technologies’ exclusive powerful, robust, fast and reliable acoustic finite and infinite element library. Sound fields in cavities are easily analyzed with Actran Acoustics which offers both modal and physical approaches. Absorbing walls may be modelled in detail using impedance conditions or porous material models. Actran Acoustics is also uniquely suited for sound radiation analysis where it brings unprecedented efficiency, speed and productivity to your analysis process. Actran Acoustics features seamless interfaces with most FEA structural analysis codes like NASTRAN, ABAQUS™ or ANSYS™. Actran Acoustics also offers powerful features for analyzing sound propagation in ducts and may be used for designing e.g. intake and exhaust lines or air distribution systems in buildings, aircrafts and cars. Among the many advanced features available in Actran Acoustics are the handling of a mean flow field (convected acoustic propagation) and temperature gradient effects. Specific elements are also available to handle visco-thermal effects important when sound waves propagates in narrow ducts or thin cavities (eg: hearing aids, solar array panels, etc.). Pressure field generated by the vibration of a powertrain. Target Applications: Sound radiation by vibrating structures: powertrain, engine components (oilpan, intake manifold and air filter, valve cover, etc.), compressors, electrical motors, loudspeakers and more. Intake and exhaust noise, including complex mufflers and silencers. Air conditioning units and distribution systems (calculation of transfer matrices coefficients). Sound absorption inside passenger compartment of cars, trains and aircrafts. Sound propagation in complex media with mean flow or temperature gradient. Audio devices such as telephones, hearing aids or musical instruments.