Essays about: "DDEs"

Showing result 1 - 5 of 6 essays containing the word DDEs.

  1. 1. Transient Flow Simulations in Exhaust After Treatment Systems

    University essay from Linköpings universitet/Mekanisk värmeteori och strömningslära

    Author : John Walder; [2020]
    Keywords : Computational Fluid Dynamics; exhaust after treatment system; ammonia mixing;

    Abstract : The exhaust after treatment system is responsible for removing particulates and contaminants from the exhaust gases. The flow entering the SCR, a catalyst utilizing ammonia to reduce NOx emissions, was studied. The quality and distribution of flow entering the SCR plays an important role in the efficiency of the systems. READ MORE

  3. 2. CFD Analysis of Pressure Instabilities in Stator-Rotor Disc Cavity Systems

    University essay from Linköpings universitet/Mekanisk värmeteori och strömningslära

    Author : Pedro Santiago Parras Blázquez; [2017]
    Keywords : ;

    Abstract : The continuous demand to improve turbine performance has led manufactures to focus on aspects that have been previously considered of secondary importance such as the secondary air system. The purpose of this system is to cool the components and prevent ingestion of hot gas into the stator-rotor cavity that could lead to low frequency pressure fluctuations called Cavity Flow Instabilities. READ MORE

  4. 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

  5. 4. CFD Study of the Flow around a High-Speed Train

    University essay from KTH/Aerodynamik

    Author : Florian Guillou; [2012]
    Keywords : Computational Fluid Dynamic; slipstream; Reynolds Averaged Navier Stokes model; k-ω SST model; aerodynamic; Aerodynamic Train Model; wake; high-speed train;

    Abstract : This document is a report summering the master thesis work dealing with the Computational Fluid Dynamic (CFD) study of the flow around a high-speed train. The model is a scaled 1:50 generic train with two cars, one inter-car gap and simplified bogies. READ MORE

  6. 5. Study of the coupled interaction between the wake’s transient behavior and pressure surfaces upstream using Detached Eddy Simulation

    University essay from KTH/Aerodynamik

    Author : David Bergman; [2012]
    Keywords : ;

    Abstract : The aerodynamic sub-discipline of flow control has for many years been, and still is today, a very prominent subject of research. This field encompasses devices that produce a beneficial change in wall-bounded or free shear flows that may lead to, among many possibilities, reduced drag of ground vehicles and airplanes. READ MORE