Essays about: "CAA"

Showing result 1 - 5 of 7 essays containing the word CAA.

  1. 1. Identification and modelling of noise sources on a realisticnose landing gear using phased array methods applied tocomputational data

    University essay from KTH/MWL Marcus Wallenberg Laboratoriet

    Author : Hamza Bouchouireb; [2017]
    Keywords : ;

    Abstract : Due to the recent development of quieter turbofan engines, airframe noise has started to emerge asthe most important noise source. This is particularly true during the approach/landing phase, whenthe engines are operated at low-thrust levels. READ MORE

  2. 2. Aeroacoustic study on the roofbar of a truck using CFD

    University essay from Chalmers tekniska högskola/Institutionen för tillämpad mekanik

    Author : Erik Johansson; [2013]
    Keywords : Aeroacoustics; CAA; LES; DES; incompressibility; compressibility; truck; roofbar; cavity; hatch;

    Abstract : Aeroacoustic CFD-simulations around a roofbar on a Volvo FH-series truck wereperformed with the purpose to find a method of how to perform an aeroacousticsimulation. The simulations included incompressible approaches using DetachedEddy Simulation (DES) with the SST k-! turbulence-model and Spalart-Allmarasturbulence-model as RANS-models, and Large Eddy Simulation (LES) but also acompressible approach using SST-DES. READ MORE

  3. 3. Numerical Investigation of Flow Induced Noise in a Simplified HVAC Duct with OpenFOAM

    University essay from KTH/Flygdynamik

    Author : Cong Wang; [2013]
    Keywords : ;

    Abstract : Due to the growing demand for comfort, the noise generated by HVAC components should be considered by the designers. Flow induced noise is one of the major contributors to the noise in HVAC systems. By means of computational aero-acoustics(CAA), the mechanism of noise generationis able to be studiedin the design phase. READ MORE

  4. 4. A Wave Propagation Solver for Computational Aero-Acoustics

    University essay from Göteborgs universitet/Institutionen för matematiska vetenskaper

    Author : Elin Solberg; [2012-03-14]
    Keywords : Helmholtz equation; Lighthill’s analogy; computationalaero-acoustics; finite element method; Galerkin least-squares stabilization; infinite element method; computational fluid dynamics;

    Abstract : Simulation software is increasingly replacing traditional physicaltesting in the process of product development, as it can in many casesreduce development times and costs. In a variety of applications, thereduction of noise is an important aspect of the product design andusing methods from the field of computational aero-acoustics (CAA),the generation and propagation of sound in air may be simulated. READ MORE

  5. 5. A STEP Implementation for Product Data Exchange : DT005A

    University essay from Mittuniversitetet/Institutionen för informationsteknologi och medier

    Author : Sairam Ghanta; [2012]
    Keywords : ;

    Abstract : SCANIA does the automobile production based on Modular Approach. A ModularSystem provides a huge variety of specifications to meet varying dramatic needs fordifferent customers. Modular approach with the support of reusable components increasesthe efficiency of designing different products. READ MORE